backup

app/__init__.py

@@ -0,0 +1,218 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Flask 應用程式工廠
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import os
+import redis
+from flask import Flask, request, make_response
+from flask_sqlalchemy import SQLAlchemy
+from flask_cors import CORS
+from flask_jwt_extended import JWTManager
+from celery import Celery
+from app.config import config
+from app.utils.logger import init_logging
+
+# 初始化擴展
+db = SQLAlchemy()
+cors = CORS()
+jwt = JWTManager()
+
+
+def make_celery(app):
+    """創建 Celery 實例"""
+    celery = Celery(
+        app.import_name,
+        backend=app.config['CELERY_RESULT_BACKEND'],
+        broker=app.config['CELERY_BROKER_URL']
+    )
+    celery.conf.update(app.config)
+    
+    class ContextTask(celery.Task):
+        """在 Flask 應用上下文中執行任務"""
+        def __call__(self, *args, **kwargs):
+            with app.app_context():
+                return self.run(*args, **kwargs)
+    
+    celery.Task = ContextTask
+    return celery
+
+
+def create_app(config_name=None):
+    """應用程式工廠"""
+    app = Flask(__name__)
+    
+    # 載入配置
+    config_name = config_name or os.getenv('FLASK_ENV', 'default')
+    
+    # 先載入 Dify API 配置
+    config[config_name].load_dify_config()
+    
+    # 然後載入配置到 Flask app
+    app.config.from_object(config[config_name])
+    
+    # 初始化必要目錄
+    config[config_name].init_directories()
+    
+    # 初始化擴展
+    db.init_app(app)
+    
+    # 不使用 Flask-CORS 避免衝突，使用手動CORS處理
+    
+    # 初始化 JWT
+    jwt.init_app(app)
+    app.logger.info(f"🔑 [JWT Config] JWT_SECRET_KEY: {app.config.get('JWT_SECRET_KEY')[:10]}...{app.config.get('JWT_SECRET_KEY')[-10:] if app.config.get('JWT_SECRET_KEY') else 'None'}")
+    app.logger.info(f"🔑 [JWT Config] JWT_ACCESS_TOKEN_EXPIRES: {app.config.get('JWT_ACCESS_TOKEN_EXPIRES')}")
+    app.logger.info(f"🔑 [JWT Config] JWT_REFRESH_TOKEN_EXPIRES: {app.config.get('JWT_REFRESH_TOKEN_EXPIRES')}")
+    
+    app.logger.info("🔑 [JWT] Using JWT authentication")
+    
+    # 設定 Redis（用於Celery）
+    try:
+        redis_client = redis.from_url(app.config['REDIS_URL'])
+        app.redis_client = redis_client
+    except Exception as e:
+        app.logger.warning(f"Redis initialization failed: {str(e)}")
+        app.redis_client = None
+    
+    # 初始化日誌
+    init_logging(app)
+    
+    # 註冊 API 路由
+    from app.api import api_v1
+    app.register_blueprint(api_v1)
+    
+    # 註冊錯誤處理器
+    register_error_handlers(app)
+    
+    # 添加 CORS 響應headers
+    @app.after_request
+    def after_request(response):
+        origin = request.headers.get('Origin')
+        allowed_origins = ['http://localhost:3000', 'http://127.0.0.1:3000', 'http://localhost:3001', 'http://127.0.0.1:3001', 'http://localhost:12010', 'http://127.0.0.1:12010']
+        
+        if origin and origin in allowed_origins:
+            response.headers['Access-Control-Allow-Origin'] = origin
+            response.headers['Access-Control-Allow-Headers'] = 'Content-Type, Authorization, X-Requested-With'
+            response.headers['Access-Control-Allow-Methods'] = 'GET, POST, PUT, DELETE, OPTIONS, PATCH'
+            response.headers['Access-Control-Allow-Credentials'] = 'true'
+            response.headers['Access-Control-Max-Age'] = '86400'
+        
+        return response
+    
+    # 處理 OPTIONS 預檢請求
+    @app.before_request
+    def before_request():
+        if request.method == 'OPTIONS':
+            response = make_response()
+            origin = request.headers.get('Origin')
+            allowed_origins = ['http://localhost:3000', 'http://127.0.0.1:3000', 'http://localhost:3001', 'http://127.0.0.1:3001', 'http://localhost:12010', 'http://127.0.0.1:12010']
+            
+            if origin and origin in allowed_origins:
+                response.headers['Access-Control-Allow-Origin'] = origin
+                response.headers['Access-Control-Allow-Headers'] = 'Content-Type, Authorization, X-Requested-With'
+                response.headers['Access-Control-Allow-Methods'] = 'GET, POST, PUT, DELETE, OPTIONS, PATCH'
+                response.headers['Access-Control-Allow-Credentials'] = 'true'
+                response.headers['Access-Control-Max-Age'] = '86400'
+            
+            return response
+    
+    # 建立資料表
+    with app.app_context():
+        # 導入模型
+        from app.models import User, TranslationJob, JobFile, TranslationCache, APIUsageStats, SystemLog, Notification
+        
+        db.create_all()
+        
+        # 創建默認管理員用戶（如果不存在）
+        create_default_admin()
+    
+    # 創建 Celery 實例
+    app.celery = make_celery(app)
+    
+    # 初始化 WebSocket
+    from app.websocket import init_websocket
+    app.socketio = init_websocket(app)
+    
+    app.logger.info("Flask application created successfully")
+    return app
+
+
+def register_error_handlers(app):
+    """註冊錯誤處理器"""
+    
+    @app.errorhandler(404)
+    def not_found(error):
+        return {
+            'success': False,
+            'error': 'NOT_FOUND',
+            'message': '請求的資源不存在'
+        }, 404
+    
+    @app.errorhandler(403)
+    def forbidden(error):
+        return {
+            'success': False,
+            'error': 'FORBIDDEN',
+            'message': '權限不足'
+        }, 403
+    
+    @app.errorhandler(401)
+    def unauthorized(error):
+        return {
+            'success': False,
+            'error': 'UNAUTHORIZED',
+            'message': '需要認證'
+        }, 401
+    
+    @app.errorhandler(500)
+    def internal_server_error(error):
+        return {
+            'success': False,
+            'error': 'INTERNAL_SERVER_ERROR',
+            'message': '系統內部錯誤'
+        }, 500
+    
+    @app.errorhandler(413)
+    def request_entity_too_large(error):
+        return {
+            'success': False,
+            'error': 'FILE_TOO_LARGE',
+            'message': '檔案大小超過限制'
+        }, 413
+
+
+def create_default_admin():
+    """創建默認管理員用戶"""
+    try:
+        from app.models import User
+        
+        admin_email = os.environ.get('ADMIN_EMAIL', 'ymirliu@panjit.com.tw')
+        
+        # 檢查是否已存在管理員
+        admin_user = User.query.filter_by(email=admin_email).first()
+        
+        if not admin_user:
+            # 創建管理員用戶（待 LDAP 登入時完善資訊）
+            admin_user = User(
+                username=admin_email.split('@')[0],
+                display_name='系統管理員',
+                email=admin_email,
+                department='IT',
+                is_admin=True
+            )
+            db.session.add(admin_user)
+            db.session.commit()
+            
+            print(f"Created default admin user: {admin_email}")
+    
+    except Exception as e:
+        print(f"Failed to create default admin: {str(e)}")
+
+
+# 導入模型在需要時才進行，避免循環導入

app/api/__init__.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+API 模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from flask import Blueprint
+
+# 建立 API Blueprint
+api_v1 = Blueprint('api_v1', __name__, url_prefix='/api/v1')
+
+# 匯入各 API 模組
+from . import auth, jobs, files, admin, health, notification
+
+# 註冊路由
+api_v1.register_blueprint(auth.auth_bp)
+api_v1.register_blueprint(jobs.jobs_bp)
+api_v1.register_blueprint(files.files_bp)
+api_v1.register_blueprint(admin.admin_bp)
+api_v1.register_blueprint(health.health_bp)
+api_v1.register_blueprint(notification.notification_bp)

app/api/auth.py

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+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+JWT 認證 API
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-09-02
+"""
+
+from flask import Blueprint, request, jsonify, current_app
+from flask_jwt_extended import (
+    create_access_token, create_refresh_token, 
+    jwt_required, get_jwt_identity, get_jwt
+)
+from app.utils.ldap_auth import LDAPAuthService
+from app.utils.decorators import validate_json, rate_limit
+from app.utils.exceptions import AuthenticationError
+from app.utils.logger import get_logger
+from app.models.user import User
+from app.models.log import SystemLog
+
+auth_bp = Blueprint('auth', __name__, url_prefix='/auth')
+logger = get_logger(__name__)
+
+
+@auth_bp.route('/login', methods=['POST'])
+@rate_limit(max_requests=10, per_seconds=300)  # 5分鐘內最多10次嘗試
+@validate_json(['username', 'password'])
+def login():
+    """使用者登入"""
+    try:
+        data = request.get_json()
+        username = data['username'].strip()
+        password = data['password']
+        
+        if not username or not password:
+            return jsonify({
+                'success': False,
+                'error': 'INVALID_INPUT',
+                'message': '帳號和密碼不能為空'
+            }), 400
+        
+        # LDAP 認證
+        ldap_service = LDAPAuthService()
+        user_info = ldap_service.authenticate_user(username, password)
+        
+        # 取得或建立使用者
+        user = User.get_or_create(
+            username=user_info['username'],
+            display_name=user_info['display_name'],
+            email=user_info['email'],
+            department=user_info.get('department')
+        )
+        
+        # 更新登入時間
+        user.update_last_login()
+        
+        # 創建 JWT tokens
+        access_token = create_access_token(
+            identity=user.username,
+            additional_claims={
+                'user_id': user.id,
+                'is_admin': user.is_admin,
+                'display_name': user.display_name,
+                'email': user.email
+            }
+        )
+        refresh_token = create_refresh_token(identity=user.username)
+        
+        # 記錄登入日誌
+        SystemLog.info(
+            'auth.login',
+            f'User {username} logged in successfully',
+            user_id=user.id,
+            extra_data={
+                'ip_address': request.remote_addr,
+                'user_agent': request.headers.get('User-Agent')
+            }
+        )
+        
+        logger.info(f"🔑 [JWT Created] User: {username}, UserID: {user.id}")
+        logger.info(f"User {username} logged in successfully")
+        
+        return jsonify({
+            'success': True,
+            'data': {
+                'access_token': access_token,
+                'refresh_token': refresh_token,
+                'user': user.to_dict()
+            },
+            'message': '登入成功'
+        })
+    
+    except AuthenticationError as e:
+        # 記錄認證失敗
+        SystemLog.warning(
+            'auth.login_failed',
+            f'Authentication failed for user {username}: {str(e)}',
+            extra_data={
+                'username': username,
+                'ip_address': request.remote_addr,
+                'error': str(e)
+            }
+        )
+        
+        logger.warning(f"Authentication failed for user {username}: {str(e)}")
+        
+        return jsonify({
+            'success': False,
+            'error': 'INVALID_CREDENTIALS',
+            'message': str(e)
+        }), 401
+    
+    except Exception as e:
+        logger.error(f"Login error: {str(e)}")
+        
+        SystemLog.error(
+            'auth.login_error',
+            f'Login system error: {str(e)}',
+            extra_data={
+                'username': username,
+                'error': str(e)
+            }
+        )
+        
+        return jsonify({
+            'success': False,
+            'error': 'SYSTEM_ERROR',
+            'message': '系統錯誤，請稍後再試'
+        }), 500
+
+
+@auth_bp.route('/logout', methods=['POST'])
+@jwt_required()
+def logout():
+    """使用者登出"""
+    try:
+        username = get_jwt_identity()
+        
+        # 記錄登出日誌
+        SystemLog.info(
+            'auth.logout',
+            f'User {username} logged out'
+        )
+        
+        logger.info(f"🚪 [JWT Logout] User: {username}")
+        logger.info(f"User {username} logged out")
+        
+        return jsonify({
+            'success': True,
+            'message': '登出成功'
+        })
+    
+    except Exception as e:
+        logger.error(f"Logout error: {str(e)}")
+        
+        return jsonify({
+            'success': False,
+            'error': 'SYSTEM_ERROR',
+            'message': '登出時發生錯誤'
+        }), 500
+
+
+@auth_bp.route('/me', methods=['GET'])
+@jwt_required()
+def get_current_user():
+    """取得當前使用者資訊"""
+    try:
+        username = get_jwt_identity()
+        claims = get_jwt()
+        
+        user_data = {
+            'username': username,
+            'user_id': claims.get('user_id'),
+            'is_admin': claims.get('is_admin'),
+            'display_name': claims.get('display_name'),
+            'email': claims.get('email')
+        }
+        
+        return jsonify({
+            'success': True,
+            'data': {
+                'user': user_data
+            }
+        })
+    
+    except Exception as e:
+        logger.error(f"Get current user error: {str(e)}")
+        
+        return jsonify({
+            'success': False,
+            'error': 'SYSTEM_ERROR',
+            'message': '取得使用者資訊時發生錯誤'
+        }), 500
+
+
+@auth_bp.route('/refresh', methods=['POST'])
+@jwt_required(refresh=True)
+def refresh_token():
+    """刷新 Access Token"""
+    try:
+        username = get_jwt_identity()
+        
+        # 重新取得使用者資訊
+        user = User.query.filter_by(username=username).first()
+        if not user:
+            return jsonify({
+                'success': False,
+                'error': 'USER_NOT_FOUND',
+                'message': '使用者不存在'
+            }), 401
+        
+        # 創建新的 access token
+        new_access_token = create_access_token(
+            identity=user.username,
+            additional_claims={
+                'user_id': user.id,
+                'is_admin': user.is_admin,
+                'display_name': user.display_name,
+                'email': user.email
+            }
+        )
+        
+        logger.info(f"Token refreshed for user {user.username}")
+        
+        return jsonify({
+            'success': True,
+            'data': {
+                'access_token': new_access_token,
+                'user': user.to_dict()
+            },
+            'message': 'Token 已刷新'
+        })
+    
+    except Exception as e:
+        logger.error(f"Token refresh error: {str(e)}")
+        
+        return jsonify({
+            'success': False,
+            'error': 'SYSTEM_ERROR',
+            'message': '刷新 Token 時發生錯誤'
+        }), 500
+
+
+@auth_bp.route('/check', methods=['GET'])
+@jwt_required()
+def check_auth():
+    """檢查認證狀態"""
+    try:
+        username = get_jwt_identity()
+        claims = get_jwt()
+        
+        user_data = {
+            'username': username,
+            'user_id': claims.get('user_id'),
+            'is_admin': claims.get('is_admin'),
+            'display_name': claims.get('display_name'),
+            'email': claims.get('email')
+        }
+        
+        return jsonify({
+            'success': True,
+            'authenticated': True,
+            'data': {
+                'user': user_data
+            }
+        })
+    
+    except Exception as e:
+        logger.error(f"Auth check error: {str(e)}")
+        
+        return jsonify({
+            'success': False,
+            'authenticated': False,
+            'error': 'SYSTEM_ERROR',
+            'message': '檢查認證狀態時發生錯誤'
+        }), 500
+
+
+@auth_bp.route('/search-users', methods=['GET'])
+@jwt_required()
+def search_users():
+    """搜尋使用者（LDAP）"""
+    try:
+        search_term = request.args.get('q', '').strip()
+        limit = min(int(request.args.get('limit', 20)), 50)
+        
+        if len(search_term) < 2:
+            return jsonify({
+                'success': False,
+                'error': 'INVALID_SEARCH_TERM',
+                'message': '搜尋關鍵字至少需要2個字元'
+            }), 400
+        
+        ldap_service = LDAPAuthService()
+        users = ldap_service.search_users(search_term, limit)
+        
+        return jsonify({
+            'success': True,
+            'data': {
+                'users': users,
+                'count': len(users)
+            }
+        })
+    
+    except Exception as e:
+        logger.error(f"User search error: {str(e)}")
+        
+        return jsonify({
+            'success': False,
+            'error': 'SYSTEM_ERROR',
+            'message': '搜尋使用者時發生錯誤'
+        }), 500
+
+
+# 錯誤處理器
+@auth_bp.errorhandler(429)
+def rate_limit_handler(e):
+    """速率限制錯誤處理器"""
+    return jsonify({
+        'success': False,
+        'error': 'RATE_LIMIT_EXCEEDED',
+        'message': '請求過於頻繁，請稍後再試'
+    }), 429

app/api/files.py

@@ -0,0 +1,691 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+檔案管理 API
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import json
+import zipfile
+import tempfile
+from pathlib import Path
+from flask import Blueprint, request, jsonify, send_file, current_app, g
+from werkzeug.utils import secure_filename
+from app.utils.decorators import jwt_login_required, rate_limit
+from app.utils.validators import validate_file, validate_languages, validate_job_uuid
+from app.utils.helpers import (
+    save_uploaded_file, 
+    create_response, 
+    format_file_size,
+    generate_download_token
+)
+from app.utils.exceptions import ValidationError, FileProcessingError
+from app.utils.logger import get_logger
+from app.models.job import TranslationJob
+from app.models.log import SystemLog
+
+files_bp = Blueprint('files', __name__, url_prefix='/files')
+logger = get_logger(__name__)
+
+
+@files_bp.route('/upload', methods=['POST'])
+@jwt_login_required
+@rate_limit(max_requests=20, per_seconds=3600)  # 每小時最多20次上傳
+def upload_file():
+    """檔案上傳"""
+    try:
+        # 檢查是否有檔案
+        if 'file' not in request.files:
+            return jsonify(create_response(
+                success=False,
+                error='NO_FILE',
+                message='未選擇檔案'
+            )), 400
+        
+        file_obj = request.files['file']
+        
+        # 驗證檔案
+        file_info = validate_file(file_obj)
+        
+        # 取得翻譯設定
+        source_language = request.form.get('source_language', 'auto')
+        target_languages_str = request.form.get('target_languages', '[]')
+        
+        try:
+            target_languages = json.loads(target_languages_str)
+        except json.JSONDecodeError:
+            return jsonify(create_response(
+                success=False,
+                error='INVALID_TARGET_LANGUAGES',
+                message='目標語言格式錯誤'
+            )), 400
+        
+        # 驗證語言設定
+        lang_info = validate_languages(source_language, target_languages)
+        
+        # 建立翻譯任務
+        job = TranslationJob(
+            user_id=g.current_user_id,
+            original_filename=file_info['filename'],
+            file_extension=file_info['file_extension'],
+            file_size=file_info['file_size'],
+            file_path='',  # 暫時為空，稍後更新
+            source_language=lang_info['source_language'],
+            target_languages=lang_info['target_languages'],
+            status='PENDING'
+        )
+        
+        # 先保存到資料庫以取得 job_uuid
+        from app import db
+        db.session.add(job)
+        db.session.commit()
+        
+        # 儲存檔案
+        file_result = save_uploaded_file(file_obj, job.job_uuid)
+        
+        if not file_result['success']:
+            # 如果儲存失敗，刪除任務記錄
+            db.session.delete(job)
+            db.session.commit()
+            
+            raise FileProcessingError(f"檔案儲存失敗: {file_result['error']}")
+        
+        # 更新任務的檔案路徑
+        job.file_path = file_result['file_path']
+        
+        # 新增原始檔案記錄
+        job.add_original_file(
+            filename=file_result['filename'],
+            file_path=file_result['file_path'],
+            file_size=file_result['file_size']
+        )
+        
+        db.session.commit()
+        
+        # 計算佇列位置
+        queue_position = TranslationJob.get_queue_position(job.job_uuid)
+        
+        # 記錄日誌
+        SystemLog.info(
+            'files.upload',
+            f'File uploaded successfully: {file_info["filename"]}',
+            user_id=g.current_user_id,
+            job_id=job.id,
+            extra_data={
+                'filename': file_info['filename'],
+                'file_size': file_info['file_size'],
+                'source_language': source_language,
+                'target_languages': target_languages
+            }
+        )
+        
+        logger.info(f"File uploaded successfully: {job.job_uuid} - {file_info['filename']}")
+        
+        # 觸發翻譯任務
+        try:
+            from app.tasks.translation import process_translation_job
+            
+            # 嘗試使用 Celery 異步處理
+            try:
+                task = process_translation_job.delay(job.id)
+                logger.info(f"Translation task queued with Celery: {task.id} for job {job.job_uuid}")
+            except Exception as celery_error:
+                logger.warning(f"Celery not available, falling back to synchronous processing: {str(celery_error)}")
+                
+                # Celery 不可用時，使用同步處理
+                try:
+                    from app.services.translation_service import TranslationService
+                    service = TranslationService()
+                    
+                    # 在後台執行翻譯（同步處理）
+                    logger.info(f"Starting synchronous translation for job {job.job_uuid}")
+                    result = service.translate_document(job.job_uuid)
+                    logger.info(f"Synchronous translation completed for job {job.job_uuid}: {result}")
+                    
+                except Exception as sync_error:
+                    logger.error(f"Synchronous translation failed for job {job.job_uuid}: {str(sync_error)}")
+                    job.update_status('FAILED', error_message=f"翻譯處理失敗: {str(sync_error)}")
+                    db.session.commit()
+                    
+        except Exception as e:
+            logger.error(f"Failed to process translation for job {job.job_uuid}: {str(e)}")
+            job.update_status('FAILED', error_message=f"任務處理失敗: {str(e)}")
+            db.session.commit()
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'job_uuid': job.job_uuid,
+                'original_filename': job.original_filename,
+                'file_size': job.file_size,
+                'file_size_formatted': format_file_size(job.file_size),
+                'source_language': job.source_language,
+                'target_languages': job.target_languages,
+                'status': job.status,
+                'queue_position': queue_position,
+                'created_at': job.created_at.isoformat()
+            },
+            message='檔案上傳成功，已加入翻譯佇列'
+        ))
+    
+    except ValidationError as e:
+        logger.warning(f"File upload validation error: {str(e)}")
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except FileProcessingError as e:
+        logger.error(f"File processing error: {str(e)}")
+        return jsonify(create_response(
+            success=False,
+            error='FILE_PROCESSING_ERROR',
+            message=str(e)
+        )), 500
+    
+    except Exception as e:
+        logger.error(f"File upload error: {str(e)}")
+        
+        SystemLog.error(
+            'files.upload_error',
+            f'File upload failed: {str(e)}',
+            user_id=g.current_user_id,
+            extra_data={'error': str(e)}
+        )
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='檔案上傳失敗'
+        )), 500
+
+
+@files_bp.route('/<job_uuid>/download/<language_code>', methods=['GET'])
+@jwt_login_required
+def download_file(job_uuid, language_code):
+    """下載翻譯檔案"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限存取此檔案'
+            )), 403
+        
+        # 檢查任務狀態
+        if job.status != 'COMPLETED':
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_COMPLETED',
+                message='任務尚未完成'
+            )), 400
+        
+        # 尋找對應的翻譯檔案
+        translated_file = None
+        for file_record in job.files:
+            if file_record.file_type == 'TRANSLATED' and file_record.language_code == language_code:
+                translated_file = file_record
+                break
+        
+        if not translated_file:
+            return jsonify(create_response(
+                success=False,
+                error='FILE_NOT_FOUND',
+                message=f'找不到 {language_code} 的翻譯檔案'
+            )), 404
+        
+        # 檢查檔案是否存在
+        file_path = Path(translated_file.file_path)
+        if not file_path.exists():
+            logger.error(f"File not found on disk: {file_path}")
+            
+            return jsonify(create_response(
+                success=False,
+                error='FILE_NOT_FOUND_ON_DISK',
+                message='檔案在伺服器上不存在'
+            )), 404
+        
+        # 記錄下載日誌
+        SystemLog.info(
+            'files.download',
+            f'File downloaded: {translated_file.filename}',
+            user_id=g.current_user_id,
+            job_id=job.id,
+            extra_data={
+                'filename': translated_file.filename,
+                'language_code': language_code,
+                'file_size': translated_file.file_size
+            }
+        )
+        
+        logger.info(f"File downloaded: {job.job_uuid} - {language_code}")
+        
+        # 發送檔案
+        return send_file(
+            str(file_path),
+            as_attachment=True,
+            download_name=translated_file.filename,
+            mimetype='application/octet-stream'
+        )
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"File download error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='檔案下載失敗'
+        )), 500
+
+
+@files_bp.route('/<job_uuid>/download/original', methods=['GET'])
+@jwt_login_required
+def download_original_file(job_uuid):
+    """下載原始檔案"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限存取此檔案'
+            )), 403
+        
+        # 取得原始檔案
+        original_file = job.get_original_file()
+        
+        if not original_file:
+            return jsonify(create_response(
+                success=False,
+                error='ORIGINAL_FILE_NOT_FOUND',
+                message='找不到原始檔案記錄'
+            )), 404
+        
+        # 檢查檔案是否存在
+        file_path = Path(original_file.file_path)
+        if not file_path.exists():
+            logger.error(f"Original file not found on disk: {file_path}")
+            
+            return jsonify(create_response(
+                success=False,
+                error='FILE_NOT_FOUND_ON_DISK',
+                message='原始檔案在伺服器上不存在'
+            )), 404
+        
+        # 記錄下載日誌
+        SystemLog.info(
+            'files.download_original',
+            f'Original file downloaded: {original_file.filename}',
+            user_id=g.current_user_id,
+            job_id=job.id,
+            extra_data={
+                'filename': original_file.filename,
+                'file_size': original_file.file_size
+            }
+        )
+        
+        logger.info(f"Original file downloaded: {job.job_uuid}")
+        
+        # 發送檔案
+        return send_file(
+            str(file_path),
+            as_attachment=True,
+            download_name=job.original_filename,
+            mimetype='application/octet-stream'
+        )
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Original file download error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='原始檔案下載失敗'
+        )), 500
+
+
+@files_bp.route('/supported-formats', methods=['GET'])
+def get_supported_formats():
+    """取得支援的檔案格式"""
+    try:
+        formats = {
+            '.docx': {
+                'name': 'Word 文件 (.docx)',
+                'description': 'Microsoft Word 2007+ 格式',
+                'icon': 'file-word'
+            },
+            '.doc': {
+                'name': 'Word 文件 (.doc)',
+                'description': 'Microsoft Word 97-2003 格式',
+                'icon': 'file-word'
+            },
+            '.pptx': {
+                'name': 'PowerPoint 簡報 (.pptx)',
+                'description': 'Microsoft PowerPoint 2007+ 格式',
+                'icon': 'file-powerpoint'
+            },
+            '.xlsx': {
+                'name': 'Excel 試算表 (.xlsx)',
+                'description': 'Microsoft Excel 2007+ 格式',
+                'icon': 'file-excel'
+            },
+            '.xls': {
+                'name': 'Excel 試算表 (.xls)',
+                'description': 'Microsoft Excel 97-2003 格式',
+                'icon': 'file-excel'
+            },
+            '.pdf': {
+                'name': 'PDF 文件 (.pdf)',
+                'description': 'Portable Document Format',
+                'icon': 'file-pdf'
+            }
+        }
+        
+        max_size = current_app.config.get('MAX_CONTENT_LENGTH', 26214400)
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'supported_formats': formats,
+                'max_file_size': max_size,
+                'max_file_size_formatted': format_file_size(max_size)
+            }
+        ))
+    
+    except Exception as e:
+        logger.error(f"Get supported formats error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得支援格式失敗'
+        )), 500
+
+
+@files_bp.route('/supported-languages', methods=['GET'])
+def get_supported_languages():
+    """取得支援的語言"""
+    try:
+        from app.utils.helpers import get_supported_languages
+        
+        languages = get_supported_languages()
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'supported_languages': languages
+            }
+        ))
+    
+    except Exception as e:
+        logger.error(f"Get supported languages error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得支援語言失敗'
+        )), 500
+
+
+@files_bp.route('/<job_uuid>/download/batch', methods=['GET'])
+@jwt_login_required
+def download_batch_files(job_uuid):
+    """批量下載所有翻譯檔案為 ZIP"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限存取此檔案'
+            )), 403
+        
+        # 檢查任務狀態
+        if job.status != 'COMPLETED':
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_COMPLETED',
+                message='任務尚未完成'
+            )), 400
+        
+        # 收集所有翻譯檔案
+        translated_files = job.get_translated_files()
+        
+        if not translated_files:
+            return jsonify(create_response(
+                success=False,
+                error='NO_TRANSLATED_FILES',
+                message='沒有找到翻譯檔案'
+            )), 404
+        
+        # 建立臨時 ZIP 檔案
+        temp_dir = tempfile.gettempdir()
+        zip_filename = f"{job.original_filename.split('.')[0]}_translations_{job.job_uuid[:8]}.zip"
+        zip_path = Path(temp_dir) / zip_filename
+        
+        try:
+            with zipfile.ZipFile(zip_path, 'w', zipfile.ZIP_DEFLATED) as zip_file:
+                files_added = 0
+                
+                # 添加原始檔案
+                original_file = job.get_original_file()
+                if original_file and Path(original_file.file_path).exists():
+                    zip_file.write(
+                        original_file.file_path,
+                        f"original/{original_file.filename}"
+                    )
+                    files_added += 1
+                
+                # 添加所有翻譯檔案（避免重複）
+                added_files = set()  # 追蹤已添加的檔案，避免重複
+                for tf in translated_files:
+                    file_path = Path(tf.file_path)
+                    if file_path.exists():
+                        # 按語言建立資料夾結構
+                        archive_name = f"{tf.language_code}/{tf.filename}"
+                        
+                        # 檢查是否已經添加過這個檔案
+                        if archive_name not in added_files:
+                            zip_file.write(str(file_path), archive_name)
+                            added_files.add(archive_name)
+                            files_added += 1
+                    else:
+                        logger.warning(f"Translation file not found: {tf.file_path}")
+                
+                if files_added == 0:
+                    return jsonify(create_response(
+                        success=False,
+                        error='NO_FILES_TO_ZIP',
+                        message='沒有可用的檔案進行壓縮'
+                    )), 404
+            
+            # 檢查 ZIP 檔案是否建立成功
+            if not zip_path.exists():
+                return jsonify(create_response(
+                    success=False,
+                    error='ZIP_CREATION_FAILED',
+                    message='ZIP 檔案建立失敗'
+                )), 500
+            
+            # 記錄下載日誌
+            SystemLog.info(
+                'files.download_batch',
+                f'Batch files downloaded: {zip_filename}',
+                user_id=g.current_user_id,
+                job_id=job.id,
+                extra_data={
+                    'zip_filename': zip_filename,
+                    'files_count': files_added,
+                    'job_uuid': job_uuid
+                }
+            )
+            
+            logger.info(f"Batch files downloaded: {job.job_uuid} - {files_added} files in ZIP")
+            
+            # 發送 ZIP 檔案
+            return send_file(
+                str(zip_path),
+                as_attachment=True,
+                download_name=zip_filename,
+                mimetype='application/zip'
+            )
+        
+        finally:
+            # 清理臨時檔案（在發送後會自動清理）
+            pass
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Batch download error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='批量下載失敗'
+        )), 500
+
+
+@files_bp.route('/<job_uuid>/download/combine', methods=['GET'])
+@jwt_login_required
+def download_combine_file(job_uuid):
+    """下載合併檔案"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得當前用戶
+        current_user_id = g.current_user_id
+        
+        # 查找任務
+        job = TranslationJob.query.filter_by(
+            job_uuid=job_uuid,
+            user_id=current_user_id
+        ).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查任務狀態
+        if job.status != 'COMPLETED':
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_COMPLETED',
+                message='任務尚未完成'
+            )), 400
+        
+        # 尋找 combine 檔案
+        combine_file = None
+        for file in job.files:
+            if file.filename.lower().find('combine') != -1 or file.file_type == 'combined':
+                combine_file = file
+                break
+        
+        if not combine_file:
+            return jsonify(create_response(
+                success=False,
+                error='COMBINE_FILE_NOT_FOUND',
+                message='找不到合併檔案'
+            )), 404
+        
+        # 檢查檔案是否存在
+        file_path = Path(combine_file.file_path)
+        if not file_path.exists():
+            return jsonify(create_response(
+                success=False,
+                error='FILE_NOT_FOUND',
+                message='合併檔案已被刪除'
+            )), 404
+        
+        logger.info(f"Combine file downloaded: {job.job_uuid} - {combine_file.filename}")
+        
+        # 發送檔案
+        return send_file(
+            str(file_path),
+            as_attachment=True,
+            download_name=combine_file.filename,
+            mimetype='application/octet-stream'
+        )
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Combine file download error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='合併檔案下載失敗'
+        )), 500

app/api/health.py

@@ -0,0 +1,224 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+系統健康檢查 API
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from datetime import datetime
+from flask import Blueprint, jsonify
+from app.utils.helpers import create_response
+from app.utils.logger import get_logger
+from app.models.job import TranslationJob
+from app.utils.timezone import format_taiwan_time, now_taiwan
+
+health_bp = Blueprint('health', __name__, url_prefix='/health')
+logger = get_logger(__name__)
+
+
+@health_bp.route('', methods=['GET'])
+def health_check():
+    """系統健康檢查"""
+    try:
+        status = {
+            'timestamp': format_taiwan_time(datetime.utcnow(), "%Y-%m-%d %H:%M:%S"),
+            'status': 'healthy',
+            'services': {}
+        }
+        
+        # 資料庫檢查
+        try:
+            from app import db
+            from sqlalchemy import text
+            db.session.execute(text('SELECT 1'))
+            status['services']['database'] = {'status': 'healthy'}
+        except Exception as e:
+            status['services']['database'] = {
+                'status': 'unhealthy',
+                'error': str(e)
+            }
+            status['status'] = 'unhealthy'
+        
+        # Redis 檢查
+        try:
+            import redis
+            from flask import current_app
+            redis_client = redis.from_url(current_app.config['REDIS_URL'])
+            redis_client.ping()
+            status['services']['redis'] = {'status': 'healthy'}
+        except Exception as e:
+            status['services']['redis'] = {
+                'status': 'unhealthy', 
+                'error': str(e)
+            }
+            # Redis 暫時異常不影響整體狀態（如果沒有使用 Celery）
+        
+        # LDAP 檢查
+        try:
+            from app.utils.ldap_auth import LDAPAuthService
+            ldap_service = LDAPAuthService()
+            if ldap_service.test_connection():
+                status['services']['ldap'] = {'status': 'healthy'}
+            else:
+                status['services']['ldap'] = {'status': 'unhealthy', 'error': 'Connection failed'}
+        except Exception as e:
+            status['services']['ldap'] = {
+                'status': 'unhealthy',
+                'error': str(e)
+            }
+            # LDAP 異常會影響整體狀態
+            status['status'] = 'unhealthy'
+        
+        # 檔案系統檢查
+        try:
+            from pathlib import Path
+            from flask import current_app
+            upload_folder = Path(current_app.config['UPLOAD_FOLDER'])
+            
+            # 檢查上傳目錄是否可寫
+            test_file = upload_folder / 'health_check.tmp'
+            test_file.write_text('health_check')
+            test_file.unlink()
+            
+            status['services']['filesystem'] = {'status': 'healthy'}
+        except Exception as e:
+            status['services']['filesystem'] = {
+                'status': 'unhealthy',
+                'error': str(e)
+            }
+            status['status'] = 'unhealthy'
+        
+        # 檢查 Dify API（如果配置了）
+        try:
+            from flask import current_app
+            if current_app.config.get('DIFY_API_KEY') and current_app.config.get('DIFY_API_BASE_URL'):
+                # 這裡會在實作 Dify 服務時加入連線測試
+                status['services']['dify_api'] = {'status': 'not_tested'}
+            else:
+                status['services']['dify_api'] = {'status': 'not_configured'}
+        except Exception as e:
+            status['services']['dify_api'] = {
+                'status': 'error',
+                'error': str(e)
+            }
+        
+        return jsonify(status), 200 if status['status'] == 'healthy' else 503
+    
+    except Exception as e:
+        logger.error(f"Health check error: {str(e)}")
+        return jsonify({
+            'timestamp': format_taiwan_time(datetime.utcnow(), "%Y-%m-%d %H:%M:%S"),
+            'status': 'error',
+            'error': str(e)
+        }), 500
+
+
+@health_bp.route('/metrics', methods=['GET'])
+def get_metrics():
+    """系統指標"""
+    try:
+        # 統計任務狀態
+        from app import db
+        from sqlalchemy import func
+        
+        job_stats = db.session.query(
+            TranslationJob.status,
+            func.count(TranslationJob.id)
+        ).group_by(TranslationJob.status).all()
+        
+        job_counts = {status: count for status, count in job_stats}
+        
+        # 系統指標
+        metrics_data = {
+            'timestamp': format_taiwan_time(datetime.utcnow(), "%Y-%m-%d %H:%M:%S"),
+            'jobs': {
+                'pending': job_counts.get('PENDING', 0),
+                'processing': job_counts.get('PROCESSING', 0),
+                'completed': job_counts.get('COMPLETED', 0),
+                'failed': job_counts.get('FAILED', 0),
+                'retry': job_counts.get('RETRY', 0),
+                'total': sum(job_counts.values())
+            }
+        }
+        
+        # 添加最近24小時的統計
+        from datetime import timedelta
+        yesterday = datetime.utcnow() - timedelta(days=1)
+        
+        recent_jobs = db.session.query(
+            TranslationJob.status,
+            func.count(TranslationJob.id)
+        ).filter(
+            TranslationJob.created_at >= yesterday
+        ).group_by(TranslationJob.status).all()
+        
+        recent_counts = {status: count for status, count in recent_jobs}
+        
+        metrics_data['recent_24h'] = {
+            'pending': recent_counts.get('PENDING', 0),
+            'processing': recent_counts.get('PROCESSING', 0),
+            'completed': recent_counts.get('COMPLETED', 0),
+            'failed': recent_counts.get('FAILED', 0),
+            'retry': recent_counts.get('RETRY', 0),
+            'total': sum(recent_counts.values())
+        }
+        
+        return jsonify(create_response(
+            success=True,
+            data=metrics_data
+        ))
+    
+    except Exception as e:
+        logger.error(f"Get metrics error: {str(e)}")
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得系統指標失敗'
+        )), 500
+
+
+@health_bp.route('/version', methods=['GET'])
+def get_version():
+    """取得版本資訊"""
+    try:
+        version_info = {
+            'application': 'PANJIT Document Translator',
+            'version': '1.0.0',
+            'build_date': '2024-01-28',
+            'python_version': None,
+            'flask_version': None
+        }
+        
+        # 取得 Python 版本
+        import sys
+        version_info['python_version'] = sys.version
+        
+        # 取得 Flask 版本
+        import flask
+        version_info['flask_version'] = flask.__version__
+        
+        return jsonify(create_response(
+            success=True,
+            data=version_info
+        ))
+    
+    except Exception as e:
+        logger.error(f"Get version error: {str(e)}")
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得版本資訊失敗'
+        )), 500
+
+
+@health_bp.route('/ping', methods=['GET'])
+def ping():
+    """簡單的 ping 檢查"""
+    return jsonify({
+        'status': 'ok',
+        'timestamp': format_taiwan_time(datetime.utcnow(), "%Y-%m-%d %H:%M:%S"),
+        'message': 'pong'
+    })

app/api/jobs.py

@@ -0,0 +1,548 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+翻譯任務管理 API
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from flask import Blueprint, request, jsonify, g
+from app.utils.decorators import jwt_login_required, admin_required
+from app.utils.validators import (
+    validate_job_uuid, 
+    validate_pagination, 
+    validate_date_range
+)
+from app.utils.helpers import create_response, calculate_processing_time
+from app.utils.exceptions import ValidationError
+from app.utils.logger import get_logger
+from app.models.job import TranslationJob
+from app.models.stats import APIUsageStats
+from app.models.log import SystemLog
+from sqlalchemy import and_, or_
+
+jobs_bp = Blueprint('jobs', __name__, url_prefix='/jobs')
+logger = get_logger(__name__)
+
+
+@jobs_bp.route('', methods=['GET'])
+@jwt_login_required
+def get_user_jobs():
+    """取得使用者任務列表"""
+    try:
+        # 取得查詢參數
+        page = request.args.get('page', 1, type=int)
+        per_page = request.args.get('per_page', 20, type=int)
+        status = request.args.get('status', 'all')
+        
+        # 驗證分頁參數
+        page, per_page = validate_pagination(page, per_page)
+        
+        # 建立查詢（排除軟刪除的記錄）
+        query = TranslationJob.query.filter_by(user_id=g.current_user_id).filter(TranslationJob.deleted_at.is_(None))
+        
+        # 狀態篩選
+        if status and status != 'all':
+            valid_statuses = ['PENDING', 'PROCESSING', 'COMPLETED', 'FAILED', 'RETRY']
+            if status.upper() in valid_statuses:
+                query = query.filter_by(status=status.upper())
+        
+        # 排序
+        query = query.order_by(TranslationJob.created_at.desc())
+        
+        # 分頁
+        pagination = query.paginate(
+            page=page, 
+            per_page=per_page, 
+            error_out=False
+        )
+        
+        jobs = pagination.items
+        
+        # 組合回應資料
+        jobs_data = []
+        for job in jobs:
+            job_data = job.to_dict(include_files=False)
+            
+            # 計算處理時間
+            if job.processing_started_at and job.completed_at:
+                job_data['processing_time'] = calculate_processing_time(
+                    job.processing_started_at, job.completed_at
+                )
+            
+            # 取得佇列位置（只對 PENDING 狀態）
+            if job.status == 'PENDING':
+                job_data['queue_position'] = TranslationJob.get_queue_position(job.job_uuid)
+            
+            jobs_data.append(job_data)
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'jobs': jobs_data,
+                'pagination': {
+                    'page': page,
+                    'per_page': per_page,
+                    'total': pagination.total,
+                    'pages': pagination.pages,
+                    'has_prev': pagination.has_prev,
+                    'has_next': pagination.has_next
+                }
+            }
+        ))
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Get user jobs error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得任務列表失敗'
+        )), 500
+
+
+@jobs_bp.route('/<job_uuid>', methods=['GET'])
+@jwt_login_required
+def get_job_detail(job_uuid):
+    """取得任務詳細資訊"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務（排除軟刪除的記錄）
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).filter(TranslationJob.deleted_at.is_(None)).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限存取此任務'
+            )), 403
+        
+        # 取得任務詳細資料
+        job_data = job.to_dict(include_files=True)
+        
+        # 計算處理時間
+        if job.processing_started_at and job.completed_at:
+            job_data['processing_time'] = calculate_processing_time(
+                job.processing_started_at, job.completed_at
+            )
+        elif job.processing_started_at:
+            job_data['processing_time'] = calculate_processing_time(
+                job.processing_started_at
+            )
+        
+        # 取得佇列位置（只對 PENDING 狀態）
+        if job.status == 'PENDING':
+            job_data['queue_position'] = TranslationJob.get_queue_position(job.job_uuid)
+        
+        # 取得 API 使用統計（如果已完成）
+        if job.status == 'COMPLETED':
+            api_stats = APIUsageStats.get_user_statistics(
+                user_id=job.user_id,
+                start_date=job.created_at,
+                end_date=job.completed_at
+            )
+            job_data['api_usage'] = api_stats
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'job': job_data
+            }
+        ))
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Get job detail error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得任務詳情失敗'
+        )), 500
+
+
+@jobs_bp.route('/<job_uuid>/retry', methods=['POST'])
+@jwt_login_required
+def retry_job(job_uuid):
+    """重試失敗任務"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務（排除軟刪除的記錄）
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).filter(TranslationJob.deleted_at.is_(None)).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限操作此任務'
+            )), 403
+        
+        # 檢查是否可以重試
+        if not job.can_retry():
+            return jsonify(create_response(
+                success=False,
+                error='CANNOT_RETRY',
+                message='任務無法重試（狀態不正確或重試次數已達上限）'
+            )), 400
+        
+        # 重置任務狀態
+        job.update_status('PENDING', error_message=None)
+        job.increment_retry()
+        
+        # 計算新的佇列位置
+        queue_position = TranslationJob.get_queue_position(job.job_uuid)
+        
+        # 記錄重試日誌
+        SystemLog.info(
+            'jobs.retry',
+            f'Job retry requested: {job_uuid}',
+            user_id=g.current_user_id,
+            job_id=job.id,
+            extra_data={
+                'retry_count': job.retry_count,
+                'previous_error': job.error_message
+            }
+        )
+        
+        logger.info(f"Job retry requested: {job_uuid} (retry count: {job.retry_count})")
+        
+        # 重新觸發翻譯任務（這裡會在實作 Celery 時加入）
+        # from app.tasks.translation import process_translation_job
+        # process_translation_job.delay(job.id)
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'job_uuid': job.job_uuid,
+                'status': job.status,
+                'retry_count': job.retry_count,
+                'queue_position': queue_position
+            },
+            message='任務已重新加入佇列'
+        ))
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Job retry error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='重試任務失敗'
+        )), 500
+
+
+@jobs_bp.route('/statistics', methods=['GET'])
+@jwt_login_required
+def get_user_statistics():
+    """取得使用者統計資料"""
+    try:
+        # 取得日期範圍參數
+        start_date = request.args.get('start_date')
+        end_date = request.args.get('end_date')
+        
+        # 驗證日期範圍
+        if start_date or end_date:
+            start_date, end_date = validate_date_range(start_date, end_date)
+        
+        # 取得任務統計
+        job_stats = TranslationJob.get_statistics(
+            user_id=g.current_user_id,
+            start_date=start_date,
+            end_date=end_date
+        )
+        
+        # 取得 API 使用統計
+        api_stats = APIUsageStats.get_user_statistics(
+            user_id=g.current_user_id,
+            start_date=start_date,
+            end_date=end_date
+        )
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'job_statistics': job_stats,
+                'api_statistics': api_stats
+            }
+        ))
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Get user statistics error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得統計資料失敗'
+        )), 500
+
+
+@jobs_bp.route('/queue/status', methods=['GET'])
+def get_queue_status():
+    """取得佇列狀態（不需登入）"""
+    try:
+        # 取得各狀態任務數量
+        pending_count = TranslationJob.query.filter_by(status='PENDING').count()
+        processing_count = TranslationJob.query.filter_by(status='PROCESSING').count()
+        
+        # 取得當前處理中的任務（最多5個）
+        processing_jobs = TranslationJob.query.filter_by(
+            status='PROCESSING'
+        ).order_by(TranslationJob.processing_started_at).limit(5).all()
+        
+        processing_jobs_data = []
+        for job in processing_jobs:
+            processing_jobs_data.append({
+                'job_uuid': job.job_uuid,
+                'original_filename': job.original_filename,
+                'progress': float(job.progress) if job.progress else 0.0,
+                'processing_started_at': job.processing_started_at.isoformat() if job.processing_started_at else None,
+                'processing_time': calculate_processing_time(job.processing_started_at) if job.processing_started_at else None
+            })
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'queue_status': {
+                    'pending': pending_count,
+                    'processing': processing_count,
+                    'total_in_queue': pending_count + processing_count
+                },
+                'processing_jobs': processing_jobs_data
+            }
+        ))
+    
+    except Exception as e:
+        logger.error(f"Get queue status error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取得佇列狀態失敗'
+        )), 500
+
+
+@jobs_bp.route('/<job_uuid>/cancel', methods=['POST'])
+@jwt_login_required
+def cancel_job(job_uuid):
+    """取消任務（支援 PENDING 和 PROCESSING 狀態）"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務（排除軟刪除的記錄）
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).filter(TranslationJob.deleted_at.is_(None)).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限操作此任務'
+            )), 403
+        
+        # 只能取消等待中或處理中的任務
+        if job.status not in ['PENDING', 'PROCESSING']:
+            return jsonify(create_response(
+                success=False,
+                error='CANNOT_CANCEL',
+                message='只能取消等待中或處理中的任務'
+            )), 400
+        
+        # 如果是處理中的任務，需要中斷 Celery 任務
+        if job.status == 'PROCESSING':
+            try:
+                from app.services.celery_service import revoke_task
+                # 嘗試撤銷 Celery 任務
+                revoke_task(job.job_uuid)
+                logger.info(f"Celery task revoked for job: {job.job_uuid}")
+            except Exception as celery_error:
+                logger.warning(f"Failed to revoke Celery task for job {job.job_uuid}: {celery_error}")
+                # 即使撤銷失敗也繼續取消任務，因為用戶請求取消
+        
+        # 更新任務狀態為失敗（取消）
+        cancel_message = f'使用者取消任務 (原狀態: {job.status})'
+        job.update_status('FAILED', error_message=cancel_message)
+        
+        # 記錄取消日誌
+        SystemLog.info(
+            'jobs.cancel',
+            f'Job cancelled by user: {job_uuid}',
+            user_id=g.current_user_id,
+            job_id=job.id
+        )
+        
+        logger.info(f"Job cancelled by user: {job_uuid}")
+        
+        return jsonify(create_response(
+            success=True,
+            data={
+                'job_uuid': job.job_uuid,
+                'status': job.status
+            },
+            message='任務已取消'
+        ))
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Cancel job error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='取消任務失敗'
+        )), 500
+
+
+@jobs_bp.route('/<job_uuid>', methods=['DELETE'])
+@jwt_login_required
+def delete_job(job_uuid):
+    """刪除任務"""
+    try:
+        # 驗證 UUID 格式
+        validate_job_uuid(job_uuid)
+        
+        # 取得任務
+        job = TranslationJob.query.filter_by(job_uuid=job_uuid).first()
+        
+        if not job:
+            return jsonify(create_response(
+                success=False,
+                error='JOB_NOT_FOUND',
+                message='任務不存在'
+            )), 404
+        
+        # 檢查權限
+        if job.user_id != g.current_user_id and not g.is_admin:
+            return jsonify(create_response(
+                success=False,
+                error='PERMISSION_DENIED',
+                message='無權限操作此任務'
+            )), 403
+        
+        # 如果是處理中的任務，先嘗試中斷 Celery 任務
+        if job.status == 'PROCESSING':
+            try:
+                from app.services.celery_service import revoke_task
+                # 嘗試撤銷 Celery 任務
+                revoke_task(job.job_uuid)
+                logger.info(f"Celery task revoked before deletion for job: {job.job_uuid}")
+            except Exception as celery_error:
+                logger.warning(f"Failed to revoke Celery task before deletion for job {job.job_uuid}: {celery_error}")
+                # 即使撤銷失敗也繼續刪除任務，因為用戶要求刪除
+        
+        # 刪除任務相關檔案
+        import os
+        import shutil
+        from pathlib import Path
+        
+        try:
+            if job.file_path and os.path.exists(job.file_path):
+                # 取得任務目錄（通常是 uploads/job_uuid）
+                job_dir = Path(job.file_path).parent
+                if job_dir.exists() and job_dir.name == job.job_uuid:
+                    shutil.rmtree(job_dir)
+                    logger.info(f"Deleted job directory: {job_dir}")
+        except Exception as file_error:
+            logger.warning(f"Failed to delete job files: {str(file_error)}")
+        
+        # 記錄刪除日誌
+        SystemLog.info(
+            'jobs.delete',
+            f'Job deleted by user: {job_uuid}',
+            user_id=g.current_user_id,
+            job_id=job.id,
+            extra_data={
+                'filename': job.original_filename,
+                'status': job.status
+            }
+        )
+        
+        from app import db
+        
+        # 軟刪除資料庫記錄（保留數據供報表使用）
+        job.soft_delete()
+        
+        logger.info(f"Job soft deleted by user: {job_uuid}")
+        
+        return jsonify(create_response(
+            success=True,
+            message='任務已刪除'
+        ))
+    
+    except ValidationError as e:
+        return jsonify(create_response(
+            success=False,
+            error=e.error_code,
+            message=str(e)
+        )), 400
+    
+    except Exception as e:
+        logger.error(f"Delete job error: {str(e)}")
+        
+        return jsonify(create_response(
+            success=False,
+            error='SYSTEM_ERROR',
+            message='刪除任務失敗'
+        )), 500

app/api/notification.py

@@ -0,0 +1,331 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+通知系統 API 路由
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from flask import Blueprint, jsonify, request, g
+from app.utils.decorators import jwt_login_required
+from sqlalchemy import desc, and_, or_
+from datetime import datetime, timedelta
+from app import db
+from app.models import Notification, NotificationType, User
+from app.utils.response import create_taiwan_response
+# 移除不需要的導入
+
+# 建立藍圖
+notification_bp = Blueprint('notification', __name__, url_prefix='/notifications')
+
+
+@notification_bp.route('', methods=['GET'])
+@jwt_login_required
+def get_notifications():
+    """獲取當前用戶的通知列表"""
+    try:
+        # 獲取當前用戶
+        current_user_id = g.current_user_id
+        
+        # 獲取查詢參數
+        page = request.args.get('page', 1, type=int)
+        per_page = min(request.args.get('per_page', 20, type=int), 100)
+        status_filter = request.args.get('status', 'all')
+        type_filter = request.args.get('type', None)
+        
+        # 建構查詢
+        query = Notification.query.filter_by(user_id=current_user_id)
+        
+        # 只顯示未過期的通知
+        query = query.filter(or_(
+            Notification.expires_at.is_(None),
+            Notification.expires_at > datetime.now()
+        ))
+        
+        # 過濾狀態
+        if status_filter == 'unread':
+            query = query.filter_by(is_read=False)
+        elif status_filter == 'read':
+            query = query.filter_by(is_read=True)
+        
+        # 過濾類型
+        if type_filter:
+            query = query.filter_by(type=type_filter)
+        
+        # 排序 - 未讀在前，然後按時間排序
+        query = query.order_by(Notification.is_read.asc(), desc(Notification.created_at))
+        
+        # 分頁
+        paginated = query.paginate(
+            page=page, per_page=per_page, error_out=False
+        )
+        
+        # 獲取未讀數量
+        unread_count = Notification.query.filter_by(
+            user_id=current_user_id,
+            is_read=False
+        ).filter(or_(
+            Notification.expires_at.is_(None),
+            Notification.expires_at > datetime.now()
+        )).count()
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            data={
+                'notifications': [n.to_dict() for n in paginated.items],
+                'pagination': {
+                    'total': paginated.total,
+                    'page': page,
+                    'per_page': per_page,
+                    'pages': paginated.pages
+                },
+                'unread_count': unread_count
+            },
+            message='獲取通知列表成功'
+        ))
+        
+    except Exception as e:
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'獲取通知失敗：{str(e)}'
+        )), 500
+
+
+@notification_bp.route('/<notification_id>', methods=['GET'])
+@jwt_login_required
+def get_notification(notification_id):
+    """獲取單個通知詳情"""
+    try:
+        current_user_id = g.current_user_id
+        
+        # 查找通知
+        notification = Notification.query.filter_by(
+            notification_uuid=notification_id,
+            user_id=current_user_id
+        ).first()
+        
+        if not notification:
+            return jsonify(create_taiwan_response(
+                success=False,
+                error='通知不存在'
+            )), 404
+        
+        # 自動標記為已讀
+        if not notification.is_read:
+            notification.mark_as_read()
+            db.session.commit()
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            data=notification.to_dict(),
+            message='獲取通知成功'
+        ))
+        
+    except Exception as e:
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'獲取通知失敗：{str(e)}'
+        )), 500
+
+
+@notification_bp.route('/<notification_id>/read', methods=['POST'])
+@jwt_login_required
+def mark_notification_read(notification_id):
+    """標記通知為已讀"""
+    try:
+        current_user_id = g.current_user_id
+        
+        # 查找通知
+        notification = Notification.query.filter_by(
+            notification_uuid=notification_id,
+            user_id=current_user_id
+        ).first()
+        
+        if not notification:
+            return jsonify(create_taiwan_response(
+                success=False,
+                error='通知不存在'
+            )), 404
+        
+        # 標記為已讀
+        notification.mark_as_read()
+        db.session.commit()
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            message='標記已讀成功'
+        ))
+        
+    except Exception as e:
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'標記已讀失敗：{str(e)}'
+        )), 500
+
+
+@notification_bp.route('/read-all', methods=['POST'])
+@jwt_login_required
+def mark_all_read():
+    """標記所有通知為已讀"""
+    try:
+        current_user_id = g.current_user_id
+        
+        # 取得所有未讀通知
+        unread_notifications = Notification.query.filter_by(
+            user_id=current_user_id,
+            is_read=False
+        ).filter(or_(
+            Notification.expires_at.is_(None),
+            Notification.expires_at > datetime.now()
+        )).all()
+        
+        # 標記為已讀
+        for notification in unread_notifications:
+            notification.mark_as_read()
+        
+        db.session.commit()
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            data={'marked_count': len(unread_notifications)},
+            message=f'已標記 {len(unread_notifications)} 個通知為已讀'
+        ))
+        
+    except Exception as e:
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'標記全部已讀失敗：{str(e)}'
+        )), 500
+
+
+@notification_bp.route('/<notification_id>', methods=['DELETE'])
+@jwt_login_required
+def delete_notification(notification_id):
+    """刪除通知"""
+    try:
+        current_user_id = g.current_user_id
+        
+        # 查找通知
+        notification = Notification.query.filter_by(
+            notification_uuid=notification_id,
+            user_id=current_user_id
+        ).first()
+        
+        if not notification:
+            return jsonify(create_taiwan_response(
+                success=False,
+                error='通知不存在'
+            )), 404
+        
+        # 刪除通知
+        db.session.delete(notification)
+        db.session.commit()
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            message='刪除通知成功'
+        ))
+        
+    except Exception as e:
+        db.session.rollback()
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'刪除通知失敗：{str(e)}'
+        )), 500
+
+
+@notification_bp.route('/clear', methods=['POST'])
+@jwt_login_required
+def clear_read_notifications():
+    """清空所有已讀通知"""
+    try:
+        current_user_id = g.current_user_id
+        
+        # 刪除所有已讀通知
+        deleted_count = Notification.query.filter_by(
+            user_id=current_user_id,
+            is_read=True
+        ).delete()
+        
+        db.session.commit()
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            data={'deleted_count': deleted_count},
+            message=f'已清除 {deleted_count} 個已讀通知'
+        ))
+        
+    except Exception as e:
+        db.session.rollback()
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'清除通知失敗：{str(e)}'
+        )), 500
+
+
+@notification_bp.route('/test', methods=['POST'])
+@jwt_login_required
+def create_test_notification():
+    """創建測試通知（開發用）"""
+    try:
+        current_user_id = g.current_user_id
+        
+        # 創建測試通知
+        test_notification = create_notification(
+            user_id=current_user_id,
+            title="測試通知",
+            message=f"這是一個測試通知，創建於 {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}",
+            notification_type=NotificationType.INFO
+        )
+        
+        return jsonify(create_taiwan_response(
+            success=True,
+            data=test_notification.to_dict(),
+            message='測試通知已創建'
+        ))
+        
+    except Exception as e:
+        return jsonify(create_taiwan_response(
+            success=False,
+            error=f'創建測試通知失敗：{str(e)}'
+        )), 500
+
+
+# 工具函數：創建通知
+def create_notification(user_id, title, message, notification_type=NotificationType.INFO, 
+                       job_uuid=None, extra_data=None):
+    """
+    創建通知的工具函數
+    
+    Args:
+        user_id: 用戶ID
+        title: 通知標題
+        message: 通知內容
+        notification_type: 通知類型
+        job_uuid: 關聯的任務UUID（可選）
+        extra_data: 額外數據（可選）
+    
+    Returns:
+        Notification: 創建的通知對象
+    """
+    try:
+        notification = Notification(
+            user_id=user_id,
+            type=notification_type.value,
+            title=title,
+            message=message,
+            job_uuid=job_uuid,
+            extra_data=extra_data,
+            link=f"/job/{job_uuid}" if job_uuid else None
+        )
+        
+        db.session.add(notification)
+        db.session.commit()
+        
+        return notification
+        
+    except Exception as e:
+        db.session.rollback()
+        raise e

app/config.py

@@ -0,0 +1,157 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+應用程式配置模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import os
+import secrets
+from pathlib import Path
+from datetime import timedelta
+from dotenv import load_dotenv
+
+# 載入環境變數
+load_dotenv()
+
+class Config:
+    """基礎配置類別"""
+    
+    # 基本應用配置
+    SECRET_KEY = os.environ.get('SECRET_KEY') or secrets.token_hex(32)
+    APP_NAME = os.environ.get('APP_NAME', 'PANJIT Document Translator')
+    
+    # 資料庫配置
+    DATABASE_URL = os.environ.get('DATABASE_URL')
+    if DATABASE_URL and DATABASE_URL.startswith("mysql://"):
+        DATABASE_URL = DATABASE_URL.replace("mysql://", "mysql+pymysql://", 1)
+    
+    SQLALCHEMY_DATABASE_URI = DATABASE_URL
+    SQLALCHEMY_TRACK_MODIFICATIONS = False
+    SQLALCHEMY_ENGINE_OPTIONS = {
+        'pool_pre_ping': True,
+        'pool_recycle': 3600,
+        'connect_args': {
+            'charset': os.environ.get('MYSQL_CHARSET', 'utf8mb4'),
+            'connect_timeout': 30,
+            'read_timeout': 30,
+            'write_timeout': 30,
+        }
+    }
+    
+    # JWT 配置 - 改用 JWT 認證
+    JWT_SECRET_KEY = os.environ.get('JWT_SECRET_KEY') or SECRET_KEY
+    JWT_ACCESS_TOKEN_EXPIRES = timedelta(hours=8)
+    JWT_REFRESH_TOKEN_EXPIRES = timedelta(days=30)
+    JWT_ALGORITHM = 'HS256'
+    
+    # Redis 配置
+    REDIS_URL = os.environ.get('REDIS_URL', 'redis://localhost:6379/0')
+    
+    # Celery 配置
+    CELERY_BROKER_URL = os.environ.get('CELERY_BROKER_URL', 'redis://localhost:6379/0')
+    CELERY_RESULT_BACKEND = os.environ.get('CELERY_RESULT_BACKEND', 'redis://localhost:6379/0')
+    CELERY_TASK_SERIALIZER = 'json'
+    CELERY_RESULT_SERIALIZER = 'json'
+    CELERY_ACCEPT_CONTENT = ['json']
+    CELERY_TIMEZONE = 'Asia/Taipei'
+    CELERY_ENABLE_UTC = False  # 改為 False，讓 Celery 使用本地時區
+    
+    # LDAP 配置
+    LDAP_SERVER = os.environ.get('LDAP_SERVER')
+    LDAP_PORT = int(os.environ.get('LDAP_PORT', 389))
+    LDAP_USE_SSL = os.environ.get('LDAP_USE_SSL', 'false').lower() == 'true'
+    LDAP_BIND_USER_DN = os.environ.get('LDAP_BIND_USER_DN')
+    LDAP_BIND_USER_PASSWORD = os.environ.get('LDAP_BIND_USER_PASSWORD')
+    LDAP_SEARCH_BASE = os.environ.get('LDAP_SEARCH_BASE')
+    LDAP_USER_LOGIN_ATTR = os.environ.get('LDAP_USER_LOGIN_ATTR', 'userPrincipalName')
+    
+    # SMTP 配置
+    SMTP_SERVER = os.environ.get('SMTP_SERVER')
+    SMTP_PORT = int(os.environ.get('SMTP_PORT', 587))
+    SMTP_USE_TLS = os.environ.get('SMTP_USE_TLS', 'false').lower() == 'true'
+    SMTP_USE_SSL = os.environ.get('SMTP_USE_SSL', 'false').lower() == 'true'
+    SMTP_AUTH_REQUIRED = os.environ.get('SMTP_AUTH_REQUIRED', 'false').lower() == 'true'
+    SMTP_SENDER_EMAIL = os.environ.get('SMTP_SENDER_EMAIL')
+    SMTP_SENDER_PASSWORD = os.environ.get('SMTP_SENDER_PASSWORD', '')
+    
+    # 檔案上傳配置
+    UPLOAD_FOLDER = Path(os.environ.get('UPLOAD_FOLDER', 'uploads')).absolute()
+    MAX_CONTENT_LENGTH = int(os.environ.get('MAX_CONTENT_LENGTH', 26214400))  # 25MB
+    ALLOWED_EXTENSIONS = {'.docx', '.doc', '.pptx', '.xlsx', '.xls', '.pdf'}
+    FILE_RETENTION_DAYS = int(os.environ.get('FILE_RETENTION_DAYS', 7))
+    
+    # Dify API 配置（從 api.txt 載入）
+    DIFY_API_BASE_URL = ''
+    DIFY_API_KEY = ''
+    
+    # 日誌配置
+    LOG_LEVEL = os.environ.get('LOG_LEVEL', 'INFO')
+    LOG_FILE = Path(os.environ.get('LOG_FILE', 'logs/app.log')).absolute()
+    
+    # 管理員配置
+    ADMIN_EMAIL = os.environ.get('ADMIN_EMAIL', 'ymirliu@panjit.com.tw')
+    
+    @classmethod
+    def load_dify_config(cls):
+        """從 api.txt 載入 Dify API 配置"""
+        api_file = Path('api.txt')
+        if api_file.exists():
+            try:
+                with open(api_file, 'r', encoding='utf-8') as f:
+                    for line in f:
+                        if line.startswith('base_url:'):
+                            cls.DIFY_API_BASE_URL = line.split(':', 1)[1].strip()
+                        elif line.startswith('api:'):
+                            cls.DIFY_API_KEY = line.split(':', 1)[1].strip()
+            except Exception:
+                pass
+    
+    @classmethod
+    def init_directories(cls):
+        """初始化必要目錄"""
+        directories = [
+            cls.UPLOAD_FOLDER,
+            cls.LOG_FILE.parent,
+        ]
+        
+        for directory in directories:
+            directory.mkdir(parents=True, exist_ok=True)
+
+
+class DevelopmentConfig(Config):
+    """開發環境配置"""
+    DEBUG = True
+    FLASK_ENV = 'development'
+
+
+class ProductionConfig(Config):
+    """生產環境配置"""
+    DEBUG = False
+    FLASK_ENV = 'production'
+    
+    # 生產環境的額外配置
+    SQLALCHEMY_ENGINE_OPTIONS = {
+        **Config.SQLALCHEMY_ENGINE_OPTIONS,
+        'pool_size': 10,
+        'max_overflow': 20,
+    }
+
+
+class TestingConfig(Config):
+    """測試環境配置"""
+    TESTING = True
+    WTF_CSRF_ENABLED = False
+    SQLALCHEMY_DATABASE_URI = 'sqlite:///:memory:'
+
+
+# 配置映射
+config = {
+    'development': DevelopmentConfig,
+    'production': ProductionConfig,
+    'testing': TestingConfig,
+    'default': DevelopmentConfig
+}

app/models/__init__.py

@@ -0,0 +1,27 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+資料模型模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from .user import User
+from .job import TranslationJob, JobFile
+from .cache import TranslationCache
+from .stats import APIUsageStats
+from .log import SystemLog
+from .notification import Notification, NotificationType
+
+__all__ = [
+    'User',
+    'TranslationJob',
+    'JobFile',
+    'TranslationCache',
+    'APIUsageStats',
+    'SystemLog',
+    'Notification',
+    'NotificationType'
+]

app/models/cache.py

@@ -0,0 +1,138 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+翻譯快取資料模型
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import hashlib
+from sqlalchemy.sql import func
+from app import db
+
+
+class TranslationCache(db.Model):
+    """翻譯快取表 (dt_translation_cache)"""
+    __tablename__ = 'dt_translation_cache'
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    source_text_hash = db.Column(db.String(64), nullable=False, comment='來源文字hash')
+    source_language = db.Column(db.String(50), nullable=False, comment='來源語言')
+    target_language = db.Column(db.String(50), nullable=False, comment='目標語言')
+    source_text = db.Column(db.Text, nullable=False, comment='來源文字')
+    translated_text = db.Column(db.Text, nullable=False, comment='翻譯文字')
+    created_at = db.Column(db.DateTime, default=func.now(), comment='建立時間')
+    
+    # 唯一約束
+    __table_args__ = (
+        db.UniqueConstraint('source_text_hash', 'source_language', 'target_language', name='uk_cache'),
+        db.Index('idx_languages', 'source_language', 'target_language'),
+    )
+    
+    def __repr__(self):
+        return f'<TranslationCache {self.source_text_hash[:8]}...>'
+    
+    def to_dict(self):
+        """轉換為字典格式"""
+        return {
+            'id': self.id,
+            'source_text_hash': self.source_text_hash,
+            'source_language': self.source_language,
+            'target_language': self.target_language,
+            'source_text': self.source_text,
+            'translated_text': self.translated_text,
+            'created_at': self.created_at.isoformat() if self.created_at else None
+        }
+    
+    @staticmethod
+    def generate_hash(text):
+        """生成文字的 SHA256 hash"""
+        return hashlib.sha256(text.encode('utf-8')).hexdigest()
+    
+    @classmethod
+    def get_translation(cls, source_text, source_language, target_language):
+        """取得快取的翻譯"""
+        text_hash = cls.generate_hash(source_text)
+        
+        cache_entry = cls.query.filter_by(
+            source_text_hash=text_hash,
+            source_language=source_language,
+            target_language=target_language
+        ).first()
+        
+        return cache_entry.translated_text if cache_entry else None
+    
+    @classmethod
+    def save_translation(cls, source_text, source_language, target_language, translated_text):
+        """儲存翻譯到快取"""
+        text_hash = cls.generate_hash(source_text)
+        
+        # 檢查是否已存在
+        existing = cls.query.filter_by(
+            source_text_hash=text_hash,
+            source_language=source_language,
+            target_language=target_language
+        ).first()
+        
+        if existing:
+            # 更新現有記錄
+            existing.translated_text = translated_text
+        else:
+            # 建立新記錄
+            cache_entry = cls(
+                source_text_hash=text_hash,
+                source_language=source_language,
+                target_language=target_language,
+                source_text=source_text,
+                translated_text=translated_text
+            )
+            db.session.add(cache_entry)
+        
+        db.session.commit()
+        return True
+    
+    @classmethod
+    def get_cache_statistics(cls):
+        """取得快取統計資料"""
+        total_entries = cls.query.count()
+        
+        # 按語言對統計
+        language_pairs = db.session.query(
+            cls.source_language,
+            cls.target_language,
+            func.count(cls.id).label('count')
+        ).group_by(cls.source_language, cls.target_language).all()
+        
+        # 最近一週的快取命中
+        from datetime import datetime, timedelta
+        week_ago = datetime.utcnow() - timedelta(days=7)
+        recent_entries = cls.query.filter(cls.created_at >= week_ago).count()
+        
+        return {
+            'total_entries': total_entries,
+            'language_pairs': [
+                {
+                    'source_language': pair.source_language,
+                    'target_language': pair.target_language,
+                    'count': pair.count
+                }
+                for pair in language_pairs
+            ],
+            'recent_entries': recent_entries
+        }
+    
+    @classmethod
+    def clear_old_cache(cls, days_to_keep=90):
+        """清理舊快取記錄"""
+        from datetime import datetime, timedelta
+        
+        cutoff_date = datetime.utcnow() - timedelta(days=days_to_keep)
+        
+        deleted_count = cls.query.filter(
+            cls.created_at < cutoff_date
+        ).delete(synchronize_session=False)
+        
+        db.session.commit()
+        return deleted_count

app/models/job.py

@@ -0,0 +1,296 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+翻譯任務資料模型
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import json
+import uuid
+from datetime import datetime, timedelta
+from sqlalchemy.sql import func
+from sqlalchemy import event
+from app import db
+from app.utils.timezone import format_taiwan_time
+
+
+class TranslationJob(db.Model):
+    """翻譯任務表 (dt_translation_jobs)"""
+    __tablename__ = 'dt_translation_jobs'
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    job_uuid = db.Column(db.String(36), unique=True, nullable=False, index=True, comment='任務唯一識別碼')
+    user_id = db.Column(db.Integer, db.ForeignKey('dt_users.id'), nullable=False, comment='使用者ID')
+    original_filename = db.Column(db.String(500), nullable=False, comment='原始檔名')
+    file_extension = db.Column(db.String(10), nullable=False, comment='檔案副檔名')
+    file_size = db.Column(db.BigInteger, nullable=False, comment='檔案大小(bytes)')
+    file_path = db.Column(db.String(1000), nullable=False, comment='檔案路徑')
+    source_language = db.Column(db.String(50), default=None, comment='來源語言')
+    target_languages = db.Column(db.JSON, nullable=False, comment='目標語言陣列')
+    status = db.Column(
+        db.Enum('PENDING', 'PROCESSING', 'COMPLETED', 'FAILED', 'RETRY', name='job_status'), 
+        default='PENDING', 
+        comment='任務狀態'
+    )
+    progress = db.Column(db.Numeric(5, 2), default=0.00, comment='處理進度(%)')
+    retry_count = db.Column(db.Integer, default=0, comment='重試次數')
+    error_message = db.Column(db.Text, comment='錯誤訊息')
+    total_tokens = db.Column(db.Integer, default=0, comment='總token數')
+    total_cost = db.Column(db.Numeric(10, 4), default=0.0000, comment='總成本')
+    processing_started_at = db.Column(db.DateTime, comment='開始處理時間')
+    completed_at = db.Column(db.DateTime, comment='完成時間')
+    created_at = db.Column(db.DateTime, default=func.now(), comment='建立時間')
+    updated_at = db.Column(
+        db.DateTime, 
+        default=func.now(), 
+        onupdate=func.now(), 
+        comment='更新時間'
+    )
+    deleted_at = db.Column(db.DateTime, comment='軟刪除時間')
+    
+    # 關聯關係
+    files = db.relationship('JobFile', backref='job', lazy='dynamic', cascade='all, delete-orphan')
+    api_usage_stats = db.relationship('APIUsageStats', backref='job', lazy='dynamic')
+    
+    def __repr__(self):
+        return f'<TranslationJob {self.job_uuid}>'
+    
+    def __init__(self, **kwargs):
+        """初始化，自動生成 UUID"""
+        super().__init__(**kwargs)
+        if not self.job_uuid:
+            self.job_uuid = str(uuid.uuid4())
+    
+    def to_dict(self, include_files=False):
+        """轉換為字典格式"""
+        data = {
+            'id': self.id,
+            'job_uuid': self.job_uuid,
+            'user_id': self.user_id,
+            'original_filename': self.original_filename,
+            'file_extension': self.file_extension,
+            'file_size': self.file_size,
+            'file_path': self.file_path,
+            'source_language': self.source_language,
+            'target_languages': self.target_languages,
+            'status': self.status,
+            'progress': float(self.progress) if self.progress else 0.0,
+            'retry_count': self.retry_count,
+            'error_message': self.error_message,
+            'total_tokens': self.total_tokens,
+            'total_cost': float(self.total_cost) if self.total_cost else 0.0,
+            'processing_started_at': format_taiwan_time(self.processing_started_at, "%Y-%m-%d %H:%M:%S") if self.processing_started_at else None,
+            'completed_at': format_taiwan_time(self.completed_at, "%Y-%m-%d %H:%M:%S") if self.completed_at else None,
+            'created_at': format_taiwan_time(self.created_at, "%Y-%m-%d %H:%M:%S") if self.created_at else None,
+            'updated_at': format_taiwan_time(self.updated_at, "%Y-%m-%d %H:%M:%S") if self.updated_at else None,
+            'deleted_at': format_taiwan_time(self.deleted_at, "%Y-%m-%d %H:%M:%S") if self.deleted_at else None
+        }
+        
+        if include_files:
+            data['files'] = [f.to_dict() for f in self.files]
+        
+        return data
+    
+    def update_status(self, status, error_message=None, progress=None):
+        """更新任務狀態"""
+        self.status = status
+        
+        if error_message:
+            self.error_message = error_message
+        
+        if progress is not None:
+            self.progress = progress
+        
+        if status == 'PROCESSING' and not self.processing_started_at:
+            self.processing_started_at = datetime.utcnow()
+        elif status == 'COMPLETED':
+            self.completed_at = datetime.utcnow()
+            self.progress = 100.00
+        
+        self.updated_at = datetime.utcnow()
+        db.session.commit()
+    
+    def add_original_file(self, filename, file_path, file_size):
+        """新增原始檔案記錄"""
+        original_file = JobFile(
+            job_id=self.id,
+            file_type='ORIGINAL',
+            filename=filename,
+            file_path=file_path,
+            file_size=file_size
+        )
+        db.session.add(original_file)
+        db.session.commit()
+        return original_file
+    
+    def add_translated_file(self, language_code, filename, file_path, file_size):
+        """新增翻譯檔案記錄"""
+        translated_file = JobFile(
+            job_id=self.id,
+            file_type='TRANSLATED',
+            language_code=language_code,
+            filename=filename,
+            file_path=file_path,
+            file_size=file_size
+        )
+        db.session.add(translated_file)
+        db.session.commit()
+        return translated_file
+    
+    def get_translated_files(self):
+        """取得翻譯檔案"""
+        return self.files.filter_by(file_type='TRANSLATED').all()
+    
+    def get_original_file(self):
+        """取得原始檔案"""
+        return self.files.filter_by(file_type='ORIGINAL').first()
+    
+    def can_retry(self):
+        """是否可以重試"""
+        return self.status in ['FAILED', 'RETRY'] and self.retry_count < 3
+    
+    def increment_retry(self):
+        """增加重試次數"""
+        self.retry_count += 1
+        self.updated_at = datetime.utcnow()
+        db.session.commit()
+    
+    def soft_delete(self):
+        """軟刪除任務（保留資料供報表使用）"""
+        self.deleted_at = datetime.utcnow()
+        self.updated_at = datetime.utcnow()
+        db.session.commit()
+    
+    def restore(self):
+        """恢復已刪除的任務"""
+        self.deleted_at = None
+        self.updated_at = datetime.utcnow()
+        db.session.commit()
+    
+    def is_deleted(self):
+        """檢查任務是否已被軟刪除"""
+        return self.deleted_at is not None
+    
+    @classmethod
+    def get_queue_position(cls, job_uuid):
+        """取得任務在佇列中的位置"""
+        job = cls.query.filter_by(job_uuid=job_uuid, deleted_at=None).first()
+        if not job:
+            return None
+        
+        position = cls.query.filter(
+            cls.status == 'PENDING',
+            cls.deleted_at.is_(None),
+            cls.created_at < job.created_at
+        ).count()
+        
+        return position + 1
+    
+    @classmethod
+    def get_pending_jobs(cls):
+        """取得所有等待處理的任務"""
+        return cls.query.filter_by(status='PENDING', deleted_at=None).order_by(cls.created_at.asc()).all()
+    
+    @classmethod
+    def get_processing_jobs(cls):
+        """取得所有處理中的任務"""
+        return cls.query.filter_by(status='PROCESSING', deleted_at=None).all()
+    
+    @classmethod
+    def get_user_jobs(cls, user_id, status=None, limit=None, offset=None, include_deleted=False):
+        """取得使用者的任務列表"""
+        query = cls.query.filter_by(user_id=user_id)
+        
+        # 預設排除軟刪除的記錄，除非明確要求包含
+        if not include_deleted:
+            query = query.filter(cls.deleted_at.is_(None))
+        
+        if status and status != 'all':
+            query = query.filter_by(status=status.upper())
+        
+        query = query.order_by(cls.created_at.desc())
+        
+        if limit:
+            query = query.limit(limit)
+        if offset:
+            query = query.offset(offset)
+        
+        return query.all()
+    
+    @classmethod
+    def get_statistics(cls, user_id=None, start_date=None, end_date=None, include_deleted=True):
+        """取得統計資料（預設包含所有記錄以確保報表完整性）"""
+        query = cls.query
+        
+        # 報表統計預設包含已刪除記錄以確保數據完整性
+        if not include_deleted:
+            query = query.filter(cls.deleted_at.is_(None))
+        
+        if user_id:
+            query = query.filter_by(user_id=user_id)
+        
+        if start_date:
+            query = query.filter(cls.created_at >= start_date)
+        
+        if end_date:
+            query = query.filter(cls.created_at <= end_date)
+        
+        total = query.count()
+        completed = query.filter_by(status='COMPLETED').count()
+        failed = query.filter_by(status='FAILED').count()
+        processing = query.filter_by(status='PROCESSING').count()
+        pending = query.filter_by(status='PENDING').count()
+        
+        return {
+            'total': total,
+            'completed': completed,
+            'failed': failed,
+            'processing': processing,
+            'pending': pending,
+            'success_rate': (completed / total * 100) if total > 0 else 0
+        }
+
+
+class JobFile(db.Model):
+    """檔案記錄表 (dt_job_files)"""
+    __tablename__ = 'dt_job_files'
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    job_id = db.Column(db.Integer, db.ForeignKey('dt_translation_jobs.id'), nullable=False, comment='任務ID')
+    file_type = db.Column(
+        db.Enum('ORIGINAL', 'TRANSLATED', name='file_type'), 
+        nullable=False, 
+        comment='檔案類型'
+    )
+    language_code = db.Column(db.String(50), comment='語言代碼(翻譯檔案)')
+    filename = db.Column(db.String(500), nullable=False, comment='檔案名稱')
+    file_path = db.Column(db.String(1000), nullable=False, comment='檔案路徑')
+    file_size = db.Column(db.BigInteger, nullable=False, comment='檔案大小')
+    created_at = db.Column(db.DateTime, default=func.now(), comment='建立時間')
+    
+    def __repr__(self):
+        return f'<JobFile {self.filename}>'
+    
+    def to_dict(self):
+        """轉換為字典格式"""
+        return {
+            'id': self.id,
+            'job_id': self.job_id,
+            'file_type': self.file_type,
+            'language_code': self.language_code,
+            'filename': self.filename,
+            'file_path': self.file_path,
+            'file_size': self.file_size,
+            'created_at': format_taiwan_time(self.created_at, "%Y-%m-%d %H:%M:%S") if self.created_at else None
+        }
+
+
+# 事件監聽器：自動生成 UUID
+@event.listens_for(TranslationJob, 'before_insert')
+def receive_before_insert(mapper, connection, target):
+    """在插入前自動生成 UUID"""
+    if not target.job_uuid:
+        target.job_uuid = str(uuid.uuid4())

app/models/log.py

@@ -0,0 +1,211 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+系統日誌資料模型
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import json
+from datetime import datetime, timedelta
+from sqlalchemy.sql import func
+from app import db
+
+
+class SystemLog(db.Model):
+    """系統日誌表 (dt_system_logs)"""
+    __tablename__ = 'dt_system_logs'
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    level = db.Column(
+        db.Enum('DEBUG', 'INFO', 'WARNING', 'ERROR', 'CRITICAL', name='log_level'), 
+        nullable=False,
+        comment='日誌等級'
+    )
+    module = db.Column(db.String(100), nullable=False, comment='模組名稱')
+    user_id = db.Column(db.Integer, db.ForeignKey('dt_users.id'), comment='使用者ID')
+    job_id = db.Column(db.Integer, db.ForeignKey('dt_translation_jobs.id'), comment='任務ID')
+    message = db.Column(db.Text, nullable=False, comment='日誌訊息')
+    extra_data = db.Column(db.JSON, comment='額外資料')
+    created_at = db.Column(db.DateTime, default=func.now(), comment='建立時間')
+    
+    def __repr__(self):
+        return f'<SystemLog {self.level} {self.module}>'
+    
+    def to_dict(self):
+        """轉換為字典格式"""
+        return {
+            'id': self.id,
+            'level': self.level,
+            'module': self.module,
+            'user_id': self.user_id,
+            'job_id': self.job_id,
+            'message': self.message,
+            'extra_data': self.extra_data,
+            'created_at': self.created_at.isoformat() if self.created_at else None
+        }
+    
+    @classmethod
+    def log(cls, level, module, message, user_id=None, job_id=None, extra_data=None):
+        """記錄日誌"""
+        log_entry = cls(
+            level=level.upper(),
+            module=module,
+            message=message,
+            user_id=user_id,
+            job_id=job_id,
+            extra_data=extra_data
+        )
+        
+        db.session.add(log_entry)
+        db.session.commit()
+        return log_entry
+    
+    @classmethod
+    def debug(cls, module, message, user_id=None, job_id=None, extra_data=None):
+        """記錄除錯日誌"""
+        return cls.log('DEBUG', module, message, user_id, job_id, extra_data)
+    
+    @classmethod
+    def info(cls, module, message, user_id=None, job_id=None, extra_data=None):
+        """記錄資訊日誌"""
+        return cls.log('INFO', module, message, user_id, job_id, extra_data)
+    
+    @classmethod
+    def warning(cls, module, message, user_id=None, job_id=None, extra_data=None):
+        """記錄警告日誌"""
+        return cls.log('WARNING', module, message, user_id, job_id, extra_data)
+    
+    @classmethod
+    def error(cls, module, message, user_id=None, job_id=None, extra_data=None):
+        """記錄錯誤日誌"""
+        return cls.log('ERROR', module, message, user_id, job_id, extra_data)
+    
+    @classmethod
+    def critical(cls, module, message, user_id=None, job_id=None, extra_data=None):
+        """記錄嚴重錯誤日誌"""
+        return cls.log('CRITICAL', module, message, user_id, job_id, extra_data)
+    
+    @classmethod
+    def get_logs(cls, level=None, module=None, user_id=None, start_date=None, end_date=None, limit=100, offset=0):
+        """查詢日誌"""
+        query = cls.query
+        
+        if level:
+            query = query.filter_by(level=level.upper())
+        
+        if module:
+            query = query.filter(cls.module.like(f'%{module}%'))
+        
+        if user_id:
+            query = query.filter_by(user_id=user_id)
+        
+        if start_date:
+            query = query.filter(cls.created_at >= start_date)
+        
+        if end_date:
+            query = query.filter(cls.created_at <= end_date)
+        
+        # 按時間倒序排列
+        query = query.order_by(cls.created_at.desc())
+        
+        if limit:
+            query = query.limit(limit)
+        if offset:
+            query = query.offset(offset)
+        
+        return query.all()
+    
+    @classmethod
+    def get_log_statistics(cls, days=7):
+        """取得日誌統計資料"""
+        end_date = datetime.utcnow()
+        start_date = end_date - timedelta(days=days)
+        
+        # 按等級統計
+        level_stats = db.session.query(
+            cls.level,
+            func.count(cls.id).label('count')
+        ).filter(
+            cls.created_at >= start_date
+        ).group_by(cls.level).all()
+        
+        # 按模組統計
+        module_stats = db.session.query(
+            cls.module,
+            func.count(cls.id).label('count')
+        ).filter(
+            cls.created_at >= start_date
+        ).group_by(cls.module).order_by(
+            func.count(cls.id).desc()
+        ).limit(10).all()
+        
+        # 每日統計
+        daily_stats = db.session.query(
+            func.date(cls.created_at).label('date'),
+            cls.level,
+            func.count(cls.id).label('count')
+        ).filter(
+            cls.created_at >= start_date
+        ).group_by(
+            func.date(cls.created_at), cls.level
+        ).order_by(
+            func.date(cls.created_at)
+        ).all()
+        
+        return {
+            'level_stats': [
+                {'level': stat.level, 'count': stat.count}
+                for stat in level_stats
+            ],
+            'module_stats': [
+                {'module': stat.module, 'count': stat.count}
+                for stat in module_stats
+            ],
+            'daily_stats': [
+                {
+                    'date': stat.date.isoformat(),
+                    'level': stat.level,
+                    'count': stat.count
+                }
+                for stat in daily_stats
+            ]
+        }
+    
+    @classmethod
+    def cleanup_old_logs(cls, days_to_keep=30):
+        """清理舊日誌"""
+        cutoff_date = datetime.utcnow() - timedelta(days=days_to_keep)
+        
+        deleted_count = cls.query.filter(
+            cls.created_at < cutoff_date
+        ).delete(synchronize_session=False)
+        
+        db.session.commit()
+        return deleted_count
+    
+    @classmethod
+    def get_error_summary(cls, days=1):
+        """取得錯誤摘要"""
+        start_date = datetime.utcnow() - timedelta(days=days)
+        
+        error_logs = cls.query.filter(
+            cls.level.in_(['ERROR', 'CRITICAL']),
+            cls.created_at >= start_date
+        ).order_by(cls.created_at.desc()).limit(50).all()
+        
+        # 按模組分組錯誤
+        error_by_module = {}
+        for log in error_logs:
+            module = log.module
+            if module not in error_by_module:
+                error_by_module[module] = []
+            error_by_module[module].append(log.to_dict())
+        
+        return {
+            'total_errors': len(error_logs),
+            'error_by_module': error_by_module,
+            'recent_errors': [log.to_dict() for log in error_logs[:10]]
+        }

app/models/notification.py

@@ -0,0 +1,97 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+通知系統資料模型
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+from datetime import datetime
+from enum import Enum
+from sqlalchemy import func
+from sqlalchemy.orm import relationship
+from app import db
+import uuid
+import json
+
+
+class NotificationType(str, Enum):
+    """通知類型枚舉"""
+    SUCCESS = "success"  # 成功
+    ERROR = "error"      # 錯誤
+    WARNING = "warning"  # 警告
+    INFO = "info"        # 資訊
+    SYSTEM = "system"    # 系統
+
+
+class Notification(db.Model):
+    """通知模型"""
+    __tablename__ = 'dt_notifications'
+    
+    # 主鍵
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    notification_uuid = db.Column(db.String(36), unique=True, nullable=False, index=True, 
+                                 default=lambda: str(uuid.uuid4()), comment='通知唯一識別碼')
+    
+    # 基本資訊
+    user_id = db.Column(db.Integer, db.ForeignKey('dt_users.id'), nullable=False, comment='使用者ID')
+    type = db.Column(db.String(20), nullable=False, default=NotificationType.INFO.value, comment='通知類型')
+    title = db.Column(db.String(255), nullable=False, comment='通知標題')
+    message = db.Column(db.Text, nullable=False, comment='通知內容')
+    
+    # 關聯資訊（可選）
+    job_uuid = db.Column(db.String(36), nullable=True, comment='關聯任務UUID')
+    link = db.Column(db.String(500), nullable=True, comment='相關連結')
+    
+    # 狀態
+    is_read = db.Column(db.Boolean, default=False, nullable=False, comment='是否已讀')
+    read_at = db.Column(db.DateTime, nullable=True, comment='閱讀時間')
+    
+    # 時間戳記
+    created_at = db.Column(db.DateTime, default=func.now(), nullable=False, comment='建立時間')
+    expires_at = db.Column(db.DateTime, nullable=True, comment='過期時間')
+    
+    # 額外數據（JSON 格式儲存）
+    extra_data = db.Column(db.JSON, nullable=True, comment='額外數據')
+    
+    # 關聯
+    user = db.relationship("User", backref="notifications")
+    
+    def __repr__(self):
+        return f"<Notification {self.notification_uuid}: {self.title}>"
+    
+    def to_dict(self):
+        """轉換為字典格式"""
+        return {
+            'id': self.notification_uuid,  # 前端使用 UUID
+            'user_id': self.user_id,
+            'type': self.type,
+            'title': self.title,
+            'message': self.message,
+            'job_uuid': self.job_uuid,
+            'link': self.link,
+            'is_read': self.is_read,
+            'read': self.is_read,  # 為了前端相容
+            'read_at': self.read_at.isoformat() if self.read_at else None,
+            'created_at': self.created_at.isoformat() if self.created_at else None,
+            'expires_at': self.expires_at.isoformat() if self.expires_at else None,
+            'extra_data': self.extra_data
+        }
+    
+    def mark_as_read(self):
+        """標記為已讀"""
+        self.is_read = True
+        self.read_at = datetime.now()
+        
+    @classmethod
+    def create_job_notification(cls, user_id, job_uuid, title, message, notification_type=NotificationType.INFO):
+        """創建任務相關通知"""
+        return cls(
+            user_id=user_id,
+            job_uuid=job_uuid,
+            type=notification_type.value,
+            title=title,
+            message=message,
+            link=f"/job/{job_uuid}"  # 連結到任務詳情頁
+        )

app/models/stats.py

@@ -0,0 +1,233 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+API使用統計資料模型
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from datetime import datetime, timedelta
+from sqlalchemy.sql import func
+from app import db
+from app.utils.timezone import format_taiwan_time
+
+
+class APIUsageStats(db.Model):
+    """API使用統計表 (dt_api_usage_stats)"""
+    __tablename__ = 'dt_api_usage_stats'
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    user_id = db.Column(db.Integer, db.ForeignKey('dt_users.id'), nullable=False, comment='使用者ID')
+    job_id = db.Column(db.Integer, db.ForeignKey('dt_translation_jobs.id'), comment='任務ID')
+    api_endpoint = db.Column(db.String(200), nullable=False, comment='API端點')
+    prompt_tokens = db.Column(db.Integer, default=0, comment='Prompt token數')
+    completion_tokens = db.Column(db.Integer, default=0, comment='Completion token數')
+    total_tokens = db.Column(db.Integer, default=0, comment='總token數')
+    prompt_unit_price = db.Column(db.Numeric(10, 8), default=0.00000000, comment='單價')
+    prompt_price_unit = db.Column(db.String(20), default='USD', comment='價格單位')
+    cost = db.Column(db.Numeric(10, 4), default=0.0000, comment='成本')
+    response_time_ms = db.Column(db.Integer, default=0, comment='回應時間(毫秒)')
+    success = db.Column(db.Boolean, default=True, comment='是否成功')
+    error_message = db.Column(db.Text, comment='錯誤訊息')
+    created_at = db.Column(db.DateTime, default=func.now(), comment='建立時間')
+    
+    def __repr__(self):
+        return f'<APIUsageStats {self.api_endpoint}>'
+    
+    def to_dict(self):
+        """轉換為字典格式"""
+        return {
+            'id': self.id,
+            'user_id': self.user_id,
+            'job_id': self.job_id,
+            'api_endpoint': self.api_endpoint,
+            'prompt_tokens': self.prompt_tokens,
+            'completion_tokens': self.completion_tokens,
+            'total_tokens': self.total_tokens,
+            'prompt_unit_price': float(self.prompt_unit_price) if self.prompt_unit_price else 0.0,
+            'prompt_price_unit': self.prompt_price_unit,
+            'cost': float(self.cost) if self.cost else 0.0,
+            'response_time_ms': self.response_time_ms,
+            'success': self.success,
+            'error_message': self.error_message,
+            'created_at': format_taiwan_time(self.created_at, "%Y-%m-%d %H:%M:%S") if self.created_at else None
+        }
+    
+    @classmethod
+    def record_api_call(cls, user_id, job_id, api_endpoint, metadata, response_time_ms, success=True, error_message=None):
+        """記錄 API 呼叫統計"""
+        # 從 Dify API metadata 解析使用量資訊
+        usage_data = metadata.get('usage', {})
+        
+        prompt_tokens = usage_data.get('prompt_tokens', 0)
+        completion_tokens = usage_data.get('completion_tokens', 0)
+        total_tokens = usage_data.get('total_tokens', prompt_tokens + completion_tokens)
+        
+        # 計算成本 - 使用 Dify API 提供的總成本
+        if 'total_price' in usage_data:
+            # 直接使用 API 提供的總價格
+            cost = float(usage_data.get('total_price', 0.0))
+        else:
+            # 備用計算方式
+            prompt_price = float(usage_data.get('prompt_price', 0.0))
+            completion_price = float(usage_data.get('completion_price', 0.0))
+            cost = prompt_price + completion_price
+        
+        # 單價資訊
+        prompt_unit_price = usage_data.get('prompt_unit_price', 0.0)
+        completion_unit_price = usage_data.get('completion_unit_price', 0.0)
+        prompt_price_unit = usage_data.get('currency', 'USD')
+        
+        stats = cls(
+            user_id=user_id,
+            job_id=job_id,
+            api_endpoint=api_endpoint,
+            prompt_tokens=prompt_tokens,
+            completion_tokens=completion_tokens,
+            total_tokens=total_tokens,
+            prompt_unit_price=prompt_unit_price,
+            prompt_price_unit=prompt_price_unit,
+            cost=cost,
+            response_time_ms=response_time_ms,
+            success=success,
+            error_message=error_message
+        )
+        
+        db.session.add(stats)
+        db.session.commit()
+        return stats
+    
+    @classmethod
+    def get_user_statistics(cls, user_id, start_date=None, end_date=None):
+        """取得使用者統計資料"""
+        query = cls.query.filter_by(user_id=user_id)
+        
+        if start_date:
+            query = query.filter(cls.created_at >= start_date)
+        if end_date:
+            query = query.filter(cls.created_at <= end_date)
+        
+        # 統計資料
+        total_calls = query.count()
+        successful_calls = query.filter_by(success=True).count()
+        total_tokens = query.with_entities(func.sum(cls.total_tokens)).scalar() or 0
+        total_cost = query.with_entities(func.sum(cls.cost)).scalar() or 0.0
+        avg_response_time = query.with_entities(func.avg(cls.response_time_ms)).scalar() or 0
+        
+        return {
+            'total_calls': total_calls,
+            'successful_calls': successful_calls,
+            'failed_calls': total_calls - successful_calls,
+            'success_rate': (successful_calls / total_calls * 100) if total_calls > 0 else 0,
+            'total_tokens': total_tokens,
+            'total_cost': float(total_cost),
+            'avg_response_time': float(avg_response_time) if avg_response_time else 0
+        }
+    
+    @classmethod
+    def get_daily_statistics(cls, days=30):
+        """取得每日統計資料"""
+        end_date = datetime.utcnow()
+        start_date = end_date - timedelta(days=days)
+        
+        # 按日期分組統計
+        daily_stats = db.session.query(
+            func.date(cls.created_at).label('date'),
+            func.count(cls.id).label('total_calls'),
+            func.sum(cls.total_tokens).label('total_tokens'),
+            func.sum(cls.cost).label('total_cost'),
+            func.count().filter(cls.success == True).label('successful_calls')
+        ).filter(
+            cls.created_at >= start_date,
+            cls.created_at <= end_date
+        ).group_by(func.date(cls.created_at)).all()
+        
+        return [
+            {
+                'date': stat.date.isoformat(),
+                'total_calls': stat.total_calls,
+                'successful_calls': stat.successful_calls,
+                'failed_calls': stat.total_calls - stat.successful_calls,
+                'total_tokens': stat.total_tokens or 0,
+                'total_cost': float(stat.total_cost or 0)
+            }
+            for stat in daily_stats
+        ]
+    
+    @classmethod
+    def get_top_users(cls, limit=10, start_date=None, end_date=None):
+        """取得使用量排行榜"""
+        query = db.session.query(
+            cls.user_id,
+            func.count(cls.id).label('total_calls'),
+            func.sum(cls.total_tokens).label('total_tokens'),
+            func.sum(cls.cost).label('total_cost')
+        )
+        
+        if start_date:
+            query = query.filter(cls.created_at >= start_date)
+        if end_date:
+            query = query.filter(cls.created_at <= end_date)
+        
+        top_users = query.group_by(cls.user_id).order_by(
+            func.sum(cls.cost).desc()
+        ).limit(limit).all()
+        
+        return [
+            {
+                'user_id': user.user_id,
+                'total_calls': user.total_calls,
+                'total_tokens': user.total_tokens or 0,
+                'total_cost': float(user.total_cost or 0)
+            }
+            for user in top_users
+        ]
+    
+    @classmethod
+    def get_cost_trend(cls, days=30):
+        """取得成本趨勢"""
+        end_date = datetime.utcnow()
+        start_date = end_date - timedelta(days=days)
+        
+        # 按日期統計成本
+        cost_trend = db.session.query(
+            func.date(cls.created_at).label('date'),
+            func.sum(cls.cost).label('daily_cost')
+        ).filter(
+            cls.created_at >= start_date,
+            cls.created_at <= end_date
+        ).group_by(func.date(cls.created_at)).order_by(
+            func.date(cls.created_at)
+        ).all()
+        
+        return [
+            {
+                'date': trend.date.isoformat(),
+                'cost': float(trend.daily_cost or 0)
+            }
+            for trend in cost_trend
+        ]
+    
+    @classmethod
+    def get_endpoint_statistics(cls):
+        """取得 API 端點統計"""
+        endpoint_stats = db.session.query(
+            cls.api_endpoint,
+            func.count(cls.id).label('total_calls'),
+            func.sum(cls.cost).label('total_cost'),
+            func.avg(cls.response_time_ms).label('avg_response_time')
+        ).group_by(cls.api_endpoint).order_by(
+            func.count(cls.id).desc()
+        ).all()
+        
+        return [
+            {
+                'endpoint': stat.api_endpoint,
+                'total_calls': stat.total_calls,
+                'total_cost': float(stat.total_cost or 0),
+                'avg_response_time': float(stat.avg_response_time or 0)
+            }
+            for stat in endpoint_stats
+        ]

app/models/user.py

@@ -0,0 +1,118 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+使用者資料模型
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from datetime import datetime, timedelta
+from sqlalchemy.sql import func
+from app import db
+from app.utils.timezone import format_taiwan_time
+
+
+class User(db.Model):
+    """使用者資訊表 (dt_users)"""
+    __tablename__ = 'dt_users'
+    
+    id = db.Column(db.Integer, primary_key=True, autoincrement=True)
+    username = db.Column(db.String(100), unique=True, nullable=False, index=True, comment='AD帳號')
+    display_name = db.Column(db.String(200), nullable=False, comment='顯示名稱')
+    email = db.Column(db.String(255), nullable=False, index=True, comment='電子郵件')
+    department = db.Column(db.String(100), comment='部門')
+    is_admin = db.Column(db.Boolean, default=False, comment='是否為管理員')
+    last_login = db.Column(db.DateTime, comment='最後登入時間')
+    created_at = db.Column(db.DateTime, default=func.now(), comment='建立時間')
+    updated_at = db.Column(
+        db.DateTime, 
+        default=func.now(), 
+        onupdate=func.now(), 
+        comment='更新時間'
+    )
+    
+    # 關聯關係
+    translation_jobs = db.relationship('TranslationJob', backref='user', lazy='dynamic', cascade='all, delete-orphan')
+    api_usage_stats = db.relationship('APIUsageStats', backref='user', lazy='dynamic', cascade='all, delete-orphan')
+    system_logs = db.relationship('SystemLog', backref='user', lazy='dynamic')
+    
+    def __repr__(self):
+        return f'<User {self.username}>'
+    
+    def to_dict(self, include_stats=False):
+        """轉換為字典格式"""
+        data = {
+            'id': self.id,
+            'username': self.username,
+            'display_name': self.display_name,
+            'email': self.email,
+            'department': self.department,
+            'is_admin': self.is_admin,
+            'last_login': format_taiwan_time(self.last_login, "%Y-%m-%d %H:%M:%S") if self.last_login else None,
+            'created_at': format_taiwan_time(self.created_at, "%Y-%m-%d %H:%M:%S") if self.created_at else None,
+            'updated_at': format_taiwan_time(self.updated_at, "%Y-%m-%d %H:%M:%S") if self.updated_at else None
+        }
+        
+        if include_stats:
+            data.update({
+                'total_jobs': self.translation_jobs.count(),
+                'completed_jobs': self.translation_jobs.filter_by(status='COMPLETED').count(),
+                'failed_jobs': self.translation_jobs.filter_by(status='FAILED').count(),
+                'total_cost': self.get_total_cost()
+            })
+        
+        return data
+    
+    def get_total_cost(self):
+        """計算使用者總成本"""
+        try:
+            from app.models.stats import APIUsageStats
+            return db.session.query(
+                func.sum(APIUsageStats.cost)
+            ).filter(APIUsageStats.user_id == self.id).scalar() or 0.0
+        except Exception:
+            return 0.0
+    
+    def update_last_login(self):
+        """更新最後登入時間"""
+        self.last_login = datetime.utcnow()
+        db.session.commit()
+    
+    @classmethod
+    def get_or_create(cls, username, display_name, email, department=None):
+        """取得或建立使用者"""
+        user = cls.query.filter_by(username=username).first()
+        
+        if user:
+            # 更新使用者資訊
+            user.display_name = display_name
+            user.email = email
+            if department:
+                user.department = department
+            user.updated_at = datetime.utcnow()
+        else:
+            # 建立新使用者
+            user = cls(
+                username=username,
+                display_name=display_name,
+                email=email,
+                department=department,
+                is_admin=(email.lower() == 'ymirliu@panjit.com.tw')  # 硬編碼管理員
+            )
+            db.session.add(user)
+        
+        db.session.commit()
+        return user
+    
+    @classmethod
+    def get_admin_users(cls):
+        """取得所有管理員使用者"""
+        return cls.query.filter_by(is_admin=True).all()
+    
+    @classmethod
+    def get_active_users(cls, days=30):
+        """取得活躍使用者（指定天數內有登入）"""
+        cutoff_date = datetime.utcnow() - timedelta(days=days)
+        return cls.query.filter(cls.last_login >= cutoff_date).all()

app/services/__init__.py

@@ -0,0 +1,19 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+業務服務模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from .dify_client import DifyClient
+from .translation_service import TranslationService
+from .notification_service import NotificationService
+
+__all__ = [
+    'DifyClient',
+    'TranslationService', 
+    'NotificationService'
+]

app/services/celery_service.py

@@ -0,0 +1,137 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Celery任務管理服務
+
+Author: PANJIT IT Team
+Created: 2025-09-04
+"""
+
+from celery import Celery
+from app.utils.logger import get_logger
+import os
+
+logger = get_logger(__name__)
+
+
+def get_celery_app():
+    """取得Celery應用實例"""
+    try:
+        from celery_app import app as celery_app
+        return celery_app
+    except ImportError:
+        # 如果無法導入，創建一個簡單的Celery實例
+        broker_url = os.getenv('REDIS_URL', 'redis://localhost:6379/0')
+        celery_app = Celery('translation_worker', broker=broker_url)
+        return celery_app
+
+
+def revoke_task(job_uuid):
+    """
+    撤銷指定任務的Celery任務
+    
+    Args:
+        job_uuid (str): 任務UUID
+        
+    Returns:
+        bool: 撤銷是否成功
+    """
+    try:
+        celery_app = get_celery_app()
+        
+        # Celery任務ID通常與job_uuid相同或相關
+        task_id = f"translate_document_{job_uuid}"
+        
+        # 嘗試撤銷任務
+        celery_app.control.revoke(task_id, terminate=True, signal='SIGKILL')
+        
+        logger.info(f"Successfully revoked Celery task: {task_id}")
+        return True
+        
+    except Exception as e:
+        logger.error(f"Failed to revoke Celery task for job {job_uuid}: {str(e)}")
+        return False
+
+
+def get_active_tasks():
+    """
+    取得當前活躍的Celery任務
+    
+    Returns:
+        list: 活躍任務列表
+    """
+    try:
+        celery_app = get_celery_app()
+        
+        # 取得活躍任務
+        inspect = celery_app.control.inspect()
+        active_tasks = inspect.active()
+        
+        if active_tasks:
+            return active_tasks
+        else:
+            return {}
+            
+    except Exception as e:
+        logger.error(f"Failed to get active tasks: {str(e)}")
+        return {}
+
+
+def is_task_active(job_uuid):
+    """
+    檢查指定任務是否在Celery中活躍
+    
+    Args:
+        job_uuid (str): 任務UUID
+        
+    Returns:
+        bool: 任務是否活躍
+    """
+    try:
+        active_tasks = get_active_tasks()
+        task_id = f"translate_document_{job_uuid}"
+        
+        # 檢查所有worker的活躍任務
+        for worker, tasks in active_tasks.items():
+            for task in tasks:
+                if task.get('id') == task_id:
+                    return True
+        
+        return False
+        
+    except Exception as e:
+        logger.error(f"Failed to check if task is active for job {job_uuid}: {str(e)}")
+        return False
+
+
+def cleanup_stale_tasks():
+    """
+    清理卡住的Celery任務
+    
+    Returns:
+        int: 清理的任務數量
+    """
+    try:
+        from app.models.job import TranslationJob
+        from datetime import datetime, timedelta
+        
+        # 找出超過30分鐘仍在處理中的任務
+        stale_threshold = datetime.utcnow() - timedelta(minutes=30)
+        stale_jobs = TranslationJob.query.filter(
+            TranslationJob.status == 'PROCESSING',
+            TranslationJob.processing_started_at < stale_threshold
+        ).all()
+        
+        cleanup_count = 0
+        for job in stale_jobs:
+            if not is_task_active(job.job_uuid):
+                # 任務不在Celery中活躍，標記為失敗
+                job.update_status('FAILED', error_message='任務處理超時，已自動取消')
+                cleanup_count += 1
+                logger.info(f"Cleaned up stale job: {job.job_uuid}")
+        
+        return cleanup_count
+        
+    except Exception as e:
+        logger.error(f"Failed to cleanup stale tasks: {str(e)}")
+        return 0

app/services/dify_client.py

@@ -0,0 +1,302 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Dify API 客戶端服務
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import time
+import requests
+from typing import Dict, Any, Optional
+from flask import current_app
+from app.utils.logger import get_logger
+from app.utils.exceptions import APIError
+from app.models.stats import APIUsageStats
+
+logger = get_logger(__name__)
+
+
+class DifyClient:
+    """Dify API 客戶端"""
+    
+    def __init__(self):
+        self.base_url = current_app.config.get('DIFY_API_BASE_URL', '')
+        self.api_key = current_app.config.get('DIFY_API_KEY', '')
+        self.timeout = (10, 60)  # (連接超時, 讀取超時)
+        self.max_retries = 3
+        self.retry_delay = 1.6  # 指數退避基數
+        
+        if not self.base_url or not self.api_key:
+            logger.warning("Dify API configuration is incomplete")
+    
+    def _make_request(self, method: str, endpoint: str, data: Dict[str, Any] = None, 
+                     user_id: int = None, job_id: int = None) -> Dict[str, Any]:
+        """發送 HTTP 請求到 Dify API"""
+        
+        if not self.base_url or not self.api_key:
+            raise APIError("Dify API 未配置完整")
+        
+        url = f"{self.base_url.rstrip('/')}/{endpoint.lstrip('/')}"
+        
+        headers = {
+            'Authorization': f'Bearer {self.api_key}',
+            'Content-Type': 'application/json',
+            'User-Agent': 'PANJIT-Document-Translator/1.0'
+        }
+        
+        # 重試邏輯
+        last_exception = None
+        start_time = time.time()
+        
+        for attempt in range(self.max_retries):
+            try:
+                logger.debug(f"Making Dify API request: {method} {url} (attempt {attempt + 1})")
+                
+                if method.upper() == 'GET':
+                    response = requests.get(url, headers=headers, timeout=self.timeout, params=data)
+                else:
+                    response = requests.post(url, headers=headers, timeout=self.timeout, json=data)
+                
+                # 計算響應時間
+                response_time_ms = int((time.time() - start_time) * 1000)
+                
+                # 檢查響應狀態
+                response.raise_for_status()
+                
+                # 解析響應
+                result = response.json()
+                
+                # 記錄 API 使用統計
+                if user_id:
+                    self._record_api_usage(
+                        user_id=user_id,
+                        job_id=job_id,
+                        endpoint=endpoint,
+                        response_data=result,
+                        response_time_ms=response_time_ms,
+                        success=True
+                    )
+                
+                logger.debug(f"Dify API request successful: {response_time_ms}ms")
+                return result
+            
+            except requests.exceptions.RequestException as e:
+                last_exception = e
+                response_time_ms = int((time.time() - start_time) * 1000)
+                
+                # 記錄失敗的 API 調用
+                if user_id:
+                    self._record_api_usage(
+                        user_id=user_id,
+                        job_id=job_id,
+                        endpoint=endpoint,
+                        response_data={},
+                        response_time_ms=response_time_ms,
+                        success=False,
+                        error_message=str(e)
+                    )
+                
+                logger.warning(f"Dify API request failed (attempt {attempt + 1}): {str(e)}")
+                
+                # 如果是最後一次嘗試，拋出異常
+                if attempt == self.max_retries - 1:
+                    break
+                
+                # 指數退避
+                delay = self.retry_delay ** attempt
+                logger.debug(f"Retrying in {delay} seconds...")
+                time.sleep(delay)
+        
+        # 所有重試都失敗了
+        error_msg = f"Dify API request failed after {self.max_retries} attempts: {str(last_exception)}"
+        logger.error(error_msg)
+        raise APIError(error_msg)
+    
+    def _record_api_usage(self, user_id: int, job_id: Optional[int], endpoint: str, 
+                         response_data: Dict, response_time_ms: int, success: bool, 
+                         error_message: str = None):
+        """記錄 API 使用統計"""
+        try:
+            # 從響應中提取使用量資訊
+            metadata = response_data.get('metadata', {})
+            
+            # 如果 job_id 無效，則設為 None 以避免外鍵約束錯誤
+            APIUsageStats.record_api_call(
+                user_id=user_id,
+                job_id=job_id,  # 已經是 Optional，如果無效會被設為 NULL
+                api_endpoint=endpoint,
+                metadata=metadata,
+                response_time_ms=response_time_ms,
+                success=success,
+                error_message=error_message
+            )
+        except Exception as e:
+            logger.warning(f"Failed to record API usage: {str(e)}")
+    
+    def translate_text(self, text: str, source_language: str, target_language: str,
+                      user_id: int = None, job_id: int = None) -> Dict[str, Any]:
+        """翻譯文字"""
+        
+        if not text.strip():
+            raise APIError("翻譯文字不能為空")
+        
+        # 構建標準翻譯 prompt（英文指令格式）
+        language_names = {
+            'zh-tw': 'Traditional Chinese',
+            'zh-cn': 'Simplified Chinese', 
+            'en': 'English',
+            'ja': 'Japanese',
+            'ko': 'Korean',
+            'vi': 'Vietnamese',
+            'th': 'Thai',
+            'id': 'Indonesian',
+            'ms': 'Malay',
+            'es': 'Spanish',
+            'fr': 'French',
+            'de': 'German',
+            'ru': 'Russian',
+            'ar': 'Arabic'
+        }
+        
+        source_lang_name = language_names.get(source_language, source_language)
+        target_lang_name = language_names.get(target_language, target_language)
+        
+        query = f"""Task: Translate ONLY into {target_lang_name} from {source_lang_name}.
+
+Rules:
+- Output translation text ONLY (no source text, no notes, no questions, no language-detection remarks).
+- Preserve original line breaks.
+- Do NOT wrap in quotes or code blocks.
+- Maintain original formatting and structure.
+
+{text.strip()}"""
+        
+        # 構建請求資料 - 使用成功版本的格式
+        request_data = {
+            'inputs': {},
+            'response_mode': 'blocking',
+            'user': f"user_{user_id}" if user_id else "doc-translator-user",
+            'query': query
+        }
+        
+        try:
+            response = self._make_request(
+                method='POST',
+                endpoint='/chat-messages',
+                data=request_data,
+                user_id=user_id,
+                job_id=job_id
+            )
+            
+            # 從響應中提取翻譯結果 - 使用成功版本的方式
+            answer = response.get('answer')
+            
+            if not isinstance(answer, str) or not answer.strip():
+                raise APIError("Dify API 返回空的翻譯結果")
+            
+            return {
+                'success': True,
+                'translated_text': answer,
+                'source_text': text,
+                'source_language': source_language,
+                'target_language': target_language,
+                'metadata': response.get('metadata', {})
+            }
+        
+        except APIError:
+            raise
+        except Exception as e:
+            error_msg = f"翻譯請求處理錯誤: {str(e)}"
+            logger.error(error_msg)
+            raise APIError(error_msg)
+    
+    def test_connection(self) -> bool:
+        """測試 Dify API 連接"""
+        try:
+            # 發送簡單的測試請求
+            test_data = {
+                'inputs': {'text': 'test'},
+                'response_mode': 'blocking',
+                'user': 'health_check'
+            }
+            
+            response = self._make_request(
+                method='POST',
+                endpoint='/chat-messages',
+                data=test_data
+            )
+            
+            return response is not None
+        
+        except Exception as e:
+            logger.error(f"Dify API connection test failed: {str(e)}")
+            return False
+    
+    def get_app_info(self) -> Dict[str, Any]:
+        """取得 Dify 應用資訊"""
+        try:
+            response = self._make_request(
+                method='GET',
+                endpoint='/parameters'
+            )
+            
+            return {
+                'success': True,
+                'app_info': response
+            }
+        
+        except Exception as e:
+            logger.error(f"Failed to get Dify app info: {str(e)}")
+            return {
+                'success': False,
+                'error': str(e)
+            }
+    
+    @classmethod
+    def load_config_from_file(cls, file_path: str = 'api.txt'):
+        """從檔案載入 Dify API 配置"""
+        try:
+            import os
+            from pathlib import Path
+            
+            config_file = Path(file_path)
+            
+            if not config_file.exists():
+                logger.warning(f"Dify config file not found: {file_path}")
+                return
+            
+            with open(config_file, 'r', encoding='utf-8') as f:
+                for line in f:
+                    line = line.strip()
+                    if line.startswith('base_url:'):
+                        base_url = line.split(':', 1)[1].strip()
+                        current_app.config['DIFY_API_BASE_URL'] = base_url
+                    elif line.startswith('api:'):
+                        api_key = line.split(':', 1)[1].strip()
+                        current_app.config['DIFY_API_KEY'] = api_key
+            
+            logger.info("Dify API config loaded from file")
+        
+        except Exception as e:
+            logger.error(f"Failed to load Dify config from file: {str(e)}")
+
+
+def init_dify_config(app):
+    """初始化 Dify 配置"""
+    with app.app_context():
+        # 從 api.txt 載入配置
+        DifyClient.load_config_from_file()
+        
+        # 檢查配置完整性
+        base_url = app.config.get('DIFY_API_BASE_URL')
+        api_key = app.config.get('DIFY_API_KEY')
+        
+        if base_url and api_key:
+            logger.info("Dify API configuration loaded successfully")
+        else:
+            logger.warning("Dify API configuration is incomplete")
+            logger.warning(f"Base URL: {'✓' if base_url else '✗'}")
+            logger.warning(f"API Key: {'✓' if api_key else '✗'}")

app/services/document_processor.py

@@ -0,0 +1,864 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+核心文檔處理邏輯 - 移植自最佳版本
+包含完整的 DOCX 文字提取和翻譯插入功能
+
+Author: PANJIT IT Team  
+Created: 2024-09-02
+Modified: 2024-09-02
+"""
+
+import re
+import sys
+import time
+from pathlib import Path
+from typing import List, Dict, Tuple, Optional, Any
+from docx.text.paragraph import Paragraph
+from docx.table import Table, _Cell
+from docx.shared import Pt
+from docx.oxml import OxmlElement
+from docx.oxml.ns import qn, nsdecls
+import docx
+
+from app.utils.logger import get_logger
+from app.utils.exceptions import FileProcessingError
+
+logger = get_logger(__name__)
+
+# ---------- Constants ----------
+INSERT_FONT_SIZE_PT = 10
+SENTENCE_MODE = True
+
+# ---------- Optional dependencies detection ----------
+try:
+    import blingfire
+    _HAS_BLINGFIRE = True
+except ImportError:
+    _HAS_BLINGFIRE = False
+
+try:
+    import pysbd
+    _HAS_PYSBD = True
+except ImportError:
+    _HAS_PYSBD = False
+
+# ---------- Helper functions ----------
+def _has_cjk(text: str) -> bool:
+    """Check if text contains CJK (Chinese/Japanese/Korean) characters."""
+    for char in text:
+        if '\u4e00' <= char <= '\u9fff' or \
+           '\u3400' <= char <= '\u4dbf' or \
+           '\u20000' <= char <= '\u2a6df' or \
+           '\u3040' <= char <= '\u309f' or \
+           '\u30a0' <= char <= '\u30ff' or \
+           '\uac00' <= char <= '\ud7af':
+            return True
+    return False
+
+def _normalize_text(text: str) -> str:
+    """Normalize text for comparison."""
+    return re.sub(r'\s+', ' ', text.strip().lower())
+
+def _append_after(p: Paragraph, text_block: str, italic: bool=True, font_size_pt: int=INSERT_FONT_SIZE_PT) -> Paragraph:
+    """Insert a new paragraph after p, return the new paragraph (for chain insert)."""
+    new_p = OxmlElement("w:p")
+    p._p.addnext(new_p)
+    np = Paragraph(new_p, p._parent)
+    lines = text_block.split("\n")
+    for i, line in enumerate(lines):
+        run = np.add_run(line)
+        if italic: 
+            run.italic = True
+        if font_size_pt: 
+            run.font.size = Pt(font_size_pt)
+        if i < len(lines) - 1:
+            run.add_break()
+    tag = np.add_run("\u200b")
+    if italic: 
+        tag.italic = True
+    if font_size_pt: 
+        tag.font.size = Pt(font_size_pt)
+    return np
+
+def _is_our_insert_block(p: Paragraph) -> bool:
+    """Return True iff paragraph contains our zero-width marker."""
+    return any("\u200b" in (r.text or "") for r in p.runs)
+
+def _find_last_inserted_after(p: Paragraph, limit: int = 8) -> Optional[Paragraph]:
+    """Find the last paragraph that was inserted after p (up to limit paragraphs)."""
+    try:
+        # Get all paragraphs in the parent container
+        if hasattr(p._parent, 'paragraphs'):
+            all_paras = list(p._parent.paragraphs)
+        else:
+            # Handle cases where _parent doesn't have paragraphs (e.g., table cells)
+            return None
+        
+        # Find p's index
+        p_index = -1
+        for i, para in enumerate(all_paras):
+            if para._element == p._element:
+                p_index = i
+                break
+        
+        if p_index == -1:
+            return None
+        
+        # Check paragraphs after p
+        last_found = None
+        for i in range(p_index + 1, min(p_index + 1 + limit, len(all_paras))):
+            if _is_our_insert_block(all_paras[i]):
+                last_found = all_paras[i]
+            else:
+                break  # Stop at first non-inserted paragraph
+    except Exception:
+        return None
+    
+    return last_found
+
+def _p_text_with_breaks(p: Paragraph) -> str:
+    """Extract text from paragraph with line breaks preserved."""
+    parts = []
+    for node in p._element.xpath(".//*[local-name()='t' or local-name()='br' or local-name()='tab']"):
+        tag = node.tag.split('}', 1)[-1]
+        if tag == "t":
+            parts.append(node.text or "")
+        elif tag == "br":
+            parts.append("\n")
+        elif tag == "tab":
+            parts.append("\t")
+    return "".join(parts)
+
+def _get_cell_full_text(cell) -> str:
+    """
+    提取表格儲存格的完整文字內容，包含所有段落
+    """
+    try:
+        cell_texts = []
+        for para in cell.paragraphs:
+            para_text = _p_text_with_breaks(para)
+            if para_text.strip():
+                cell_texts.append(para_text.strip())
+        
+        # 用換行符連接所有段落
+        return '\n'.join(cell_texts)
+    except Exception as e:
+        logger.warning(f"提取儲存格文字失敗: {e}")
+        return ""
+
+def _is_our_insert_block_text(text: str) -> bool:
+    """檢查文字是否為翻譯插入區塊"""
+    if not text:
+        return False
+    text_lower = text.lower().strip()
+    return (
+        text_lower.startswith('【') or
+        text_lower.startswith('[翻譯') or
+        '翻譯：' in text_lower or
+        'translation:' in text_lower or
+        text_lower.startswith('translated:') or
+        "\u200b" in text
+    )
+
+def _is_our_insert_block(p: Paragraph) -> bool:
+    """Check if paragraph is our inserted translation (contains zero-width space marker)."""
+    text = _p_text_with_breaks(p)
+    return "\u200b" in text
+
+def should_translate(text: str, src_lang: str) -> bool:
+    """Determine if text should be translated based on content and source language."""
+    text = text.strip()
+    
+    # 只要有字就翻譯 - 最小長度設為1
+    if len(text) < 1:
+        return False
+    
+    # Skip pure numbers, dates, etc.
+    if re.match(r'^[\d\s\.\-\:\/]+$', text):
+        return False
+    
+    # For auto-detect, translate if has CJK or meaningful text
+    if src_lang.lower() in ('auto', 'auto-detect'):
+        return _has_cjk(text) or len(text) > 5
+    
+    return True
+
+def _split_sentences(text: str, lang: str = 'auto') -> List[str]:
+    """Split text into sentences using available libraries."""
+    if not text.strip():
+        return []
+    
+    # Try blingfire first
+    if _HAS_BLINGFIRE and SENTENCE_MODE:
+        try:
+            sentences = blingfire.text_to_sentences(text).split('\n')
+            sentences = [s.strip() for s in sentences if s.strip()]
+            if sentences:
+                return sentences
+        except Exception as e:
+            logger.warning(f"Blingfire failed: {e}")
+    
+    # Try pysbd
+    if _HAS_PYSBD and SENTENCE_MODE:
+        try:
+            seg = pysbd.Segmenter(language="en" if lang == "auto" else lang)
+            sentences = seg.segment(text)
+            sentences = [s.strip() for s in sentences if s.strip()]
+            if sentences:
+                return sentences
+        except Exception as e:
+            logger.warning(f"PySBD failed: {e}")
+    
+    # Fallback to simple splitting
+    separators = ['. ', '。', '！', '？', '!', '?', '\n']
+    sentences = [text]
+    
+    for sep in separators:
+        new_sentences = []
+        for s in sentences:
+            parts = s.split(sep)
+            if len(parts) > 1:
+                new_sentences.extend([p.strip() + sep.rstrip() for p in parts[:-1] if p.strip()])
+                if parts[-1].strip():
+                    new_sentences.append(parts[-1].strip())
+            else:
+                new_sentences.append(s)
+        sentences = new_sentences
+    
+    return [s for s in sentences if len(s.strip()) > 3]
+
+# ---------- Segment class ----------
+class Segment:
+    """Represents a translatable text segment in a document."""
+    
+    def __init__(self, kind: str, ref: Any, ctx: str, text: str):
+        self.kind = kind   # 'para' | 'txbx'
+        self.ref = ref     # Reference to original document element
+        self.ctx = ctx     # Context information
+        self.text = text   # Text content
+
+# ---------- TextBox helpers ----------
+def _txbx_iter_texts(doc: docx.Document):
+    """
+    Yield (txbxContent_element, joined_source_text)
+    - Deeply collect all descendant <w:p> under txbxContent
+    - Skip our inserted translations: contains zero-width or (all italic and no CJK)
+    - Keep only lines that still have CJK
+    """
+    def _p_text_flags(p_el):
+        parts = []
+        for node in p_el.xpath(".//*[local-name()='t' or local-name()='br' or local-name()='tab']"):
+            tag = node.tag.split('}', 1)[-1]
+            if tag == "t":
+                parts.append(node.text or "")
+            elif tag == "br":
+                parts.append("\n")
+            else:
+                parts.append(" ")
+        text = "".join(parts)
+        has_zero = ("\u200b" in text)
+        runs = p_el.xpath(".//*[local-name()='r']")
+        vis, ital = [], []
+        for r in runs:
+            rt = "".join([(t.text or "") for t in r.xpath(".//*[local-name()='t']")])
+            if (rt or "").strip():
+                vis.append(rt)
+                ital.append(bool(r.xpath(".//*[local-name()='i']")))
+        all_italic = (len(vis) > 0 and all(ital))
+        return text, has_zero, all_italic
+
+    for tx in doc._element.xpath(".//*[local-name()='txbxContent']"):
+        kept = []
+        for p in tx.xpath(".//*[local-name()='p']"):   # all descendant paragraphs
+            text, has_zero, all_italic = _p_text_flags(p)
+            if not (text or "").strip():
+                continue
+            if has_zero:
+                continue  # our inserted
+            for line in text.split("\n"):
+                if line.strip():
+                    kept.append(line.strip())
+        if kept:
+            joined = "\n".join(kept)
+            yield tx, joined
+
+def _txbx_append_paragraph(tx, text_block: str, italic: bool = True, font_size_pt: int = INSERT_FONT_SIZE_PT):
+    """Append a paragraph to textbox content."""
+    p = OxmlElement("w:p")
+    r = OxmlElement("w:r")
+    rPr = OxmlElement("w:rPr")
+    if italic:
+        rPr.append(OxmlElement("w:i"))
+    if font_size_pt:
+        sz = OxmlElement("w:sz")
+        sz.set(qn("w:val"), str(int(font_size_pt * 2)))
+        rPr.append(sz)
+    r.append(rPr)
+    lines = text_block.split("\n")
+    for i, line in enumerate(lines):
+        if i > 0:
+            r.append(OxmlElement("w:br"))
+        t = OxmlElement("w:t")
+        t.set(qn("xml:space"), "preserve")
+        t.text = line
+        r.append(t)
+    tag = OxmlElement("w:t")
+    tag.set(qn("xml:space"), "preserve")
+    tag.text = "\u200b"
+    r.append(tag)
+    p.append(r)
+    tx.append(p)
+
+def _txbx_tail_equals(tx, translations: List[str]) -> bool:
+    """Check if textbox already contains the expected translations."""
+    paras = tx.xpath("./*[local-name()='p']")
+    if len(paras) < len(translations):
+        return False
+    tail = paras[-len(translations):]
+    for q, expect in zip(tail, translations):
+        parts = []
+        for node in q.xpath(".//*[local-name()='t' or local-name()='br']"):
+            tag = node.tag.split("}", 1)[-1]
+            parts.append("\n" if tag == "br" else (node.text or ""))
+        if _normalize_text("".join(parts).strip()) != _normalize_text(expect):
+            return False
+    return True
+
+# ---------- Main extraction logic ----------
+def _get_paragraph_key(p: Paragraph) -> str:
+    """Generate a stable unique key for paragraph deduplication."""
+    try:
+        # Use XML content hash + text content for stable deduplication
+        xml_content = p._p.xml if hasattr(p._p, 'xml') else str(p._p)
+        text_content = _p_text_with_breaks(p)
+        combined = f"{hash(xml_content)}_{len(text_content)}_{text_content[:50]}"
+        return combined
+    except Exception:
+        # Fallback to simple text-based key
+        text_content = _p_text_with_breaks(p)
+        return f"fallback_{hash(text_content)}_{len(text_content)}"
+
+def _collect_docx_segments(doc: docx.Document) -> List[Segment]:
+    """
+    Enhanced segment collector with improved stability.
+    Handles paragraphs, tables, textboxes, and SDT Content Controls.
+    """
+    segs: List[Segment] = []
+    seen_par_keys = set()
+
+    def _add_paragraph(p: Paragraph, ctx: str):
+        try:
+            p_key = _get_paragraph_key(p)
+            if p_key in seen_par_keys:
+                return
+            
+            txt = _p_text_with_breaks(p)
+            if txt.strip() and not _is_our_insert_block(p):
+                segs.append(Segment("para", p, ctx, txt))
+                seen_par_keys.add(p_key)
+        except Exception as e:
+            # Log error but continue processing
+            logger.warning(f"段落處理錯誤: {e}, 跳過此段落")
+
+    def _process_container_content(container, ctx: str):
+        """
+        Recursively processes content within a container (body, cell, or SDT content).
+        Identifies and handles paragraphs, tables, and SDT elements.
+        """
+        if container._element is None:
+            return
+
+        for child_element in container._element:
+            qname = child_element.tag
+            
+            if qname.endswith('}p'):  # Paragraph
+                p = Paragraph(child_element, container)
+                _add_paragraph(p, ctx)
+
+            elif qname.endswith('}tbl'):  # Table
+                table = Table(child_element, container)
+                for r_idx, row in enumerate(table.rows, 1):
+                    for c_idx, cell in enumerate(row.cells, 1):
+                        cell_ctx = f"{ctx} > Tbl(r{r_idx},c{c_idx})"
+                        
+                        # 使用儲存格為單位的提取方式（而非逐段落提取）
+                        cell_text = _get_cell_full_text(cell)
+                        if cell_text.strip() and not _is_our_insert_block_text(cell_text):
+                            segs.append(Segment("table_cell", cell, cell_ctx, cell_text))
+
+            elif qname.endswith('}sdt'):  # Structured Document Tag (SDT)
+                sdt_ctx = f"{ctx} > SDT"
+                
+                # 1. 提取 SDT 的元數據文本 (Placeholder, Dropdown items)
+                ns = {'w': 'http://schemas.openxmlformats.org/wordprocessingml/2006/main'}
+                
+                # 提取 Placeholder text
+                placeholder_texts = []
+                for t in child_element.xpath('.//w:placeholder//w:t', namespaces=ns):
+                    if t.text:
+                        placeholder_texts.append(t.text)
+                if placeholder_texts:
+                    full_placeholder = "".join(placeholder_texts).strip()
+                    if full_placeholder:
+                        segs.append(Segment("para", child_element, f"{sdt_ctx}-Placeholder", full_placeholder))
+                
+                # 提取 Dropdown list items
+                list_items = []
+                for item in child_element.xpath('.//w:dropDownList/w:listItem', namespaces=ns):
+                    display_text = item.get(qn('w:displayText'))
+                    if display_text:
+                        list_items.append(display_text)
+                if list_items:
+                    items_as_text = "\n".join(list_items)
+                    segs.append(Segment("para", child_element, f"{sdt_ctx}-Dropdown", items_as_text))
+
+                # 2. 遞迴處理 SDT 的實際內容 (sdtContent)
+                sdt_content_element = child_element.find(qn('w:sdtContent'))
+                if sdt_content_element is not None:
+                    class SdtContentWrapper:
+                        def __init__(self, element, parent):
+                            self._element = element
+                            self._parent = parent
+                    
+                    sdt_content_wrapper = SdtContentWrapper(sdt_content_element, container)
+                    _process_container_content(sdt_content_wrapper, sdt_ctx)
+
+    # --- Main execution starts here ---
+
+    # 1. Process the main document body
+    _process_container_content(doc._body, "Body")
+
+    # 2. Process textboxes
+    for tx, s in _txbx_iter_texts(doc):
+        if s.strip() and (_has_cjk(s) or should_translate(s, 'auto')):
+            segs.append(Segment("txbx", tx, "TextBox", s))
+
+    return segs
+
+def _insert_docx_translations(doc: docx.Document, segs: List[Segment],
+                              tmap: Dict[Tuple[str, str], str],
+                              targets: List[str], log=lambda s: None) -> Tuple[int, int]:
+    """
+    Insert translations into DOCX document segments.
+    
+    CRITICAL: This function contains the fix for the major translation insertion bug.
+    The key fix is in the segment filtering logic - we now correctly check if any target
+    language has translation available using the proper key format (target_lang, text).
+    
+    Args:
+        doc: The DOCX document object
+        segs: List of segments to translate 
+        tmap: Translation map with keys as (target_language, source_text)
+        targets: List of target languages in order
+        log: Logging function
+        
+    Returns:
+        Tuple of (successful_insertions, skipped_insertions)
+        
+    Key Bug Fix:
+        OLD (INCORRECT): if (seg.kind, seg.text) not in tmap and (targets[0], seg.text) not in tmap
+        NEW (CORRECT): has_any_translation = any((tgt, seg.text) in tmap for tgt in targets)
+    """
+    ok_cnt = skip_cnt = 0
+    
+    # Helper function to add a formatted run to a paragraph
+    def _add_formatted_run(p: Paragraph, text: str, italic: bool, font_size_pt: int):
+        lines = text.split("\n")
+        for i, line in enumerate(lines):
+            run = p.add_run(line)
+            if italic:
+                run.italic = True
+            if font_size_pt:
+                run.font.size = Pt(font_size_pt)
+            if i < len(lines) - 1:
+                run.add_break()
+        # Add our zero-width space marker
+        tag_run = p.add_run("\u200b")
+        if italic:
+            tag_run.italic = True
+        if font_size_pt:
+            tag_run.font.size = Pt(font_size_pt)
+
+    for seg in segs:
+        # Check if any target language has translation for this segment
+        has_any_translation = any((tgt, seg.text) in tmap for tgt in targets)
+        if not has_any_translation:
+            log(f"[SKIP] 無翻譯結果: {seg.ctx} | {seg.text[:50]}...")
+            skip_cnt += 1
+            continue
+        
+        # Get translations for all targets, with fallback for missing ones
+        translations = []
+        for tgt in targets:
+            if (tgt, seg.text) in tmap:
+                translations.append(tmap[(tgt, seg.text)])
+            else:
+                log(f"[WARNING] 缺少 {tgt} 翻譯: {seg.text[:30]}...")
+                translations.append(f"【翻譯查詢失敗｜{tgt}】{seg.text[:50]}...")
+        
+        log(f"[INSERT] 準備插入 {len(translations)} 個翻譯到 {seg.ctx}: {seg.text[:30]}...")
+
+        if seg.kind == "para":
+            # Check if this is an SDT segment (ref is an XML element, not a Paragraph)
+            if hasattr(seg.ref, 'tag') and seg.ref.tag.endswith('}sdt'):
+                # Handle SDT segments - insert translation into sdtContent
+                sdt_element = seg.ref
+                ns = {'w': 'http://schemas.openxmlformats.org/wordprocessingml/2006/main'}
+                sdt_content = sdt_element.find(qn('w:sdtContent'))
+                
+                if sdt_content is not None:
+                    # Check if translations already exist
+                    existing_paras = sdt_content.xpath('.//w:p', namespaces=ns)
+                    existing_texts = []
+                    for ep in existing_paras:
+                        p_obj = Paragraph(ep, None)
+                        if _is_our_insert_block(p_obj):
+                            existing_texts.append(_p_text_with_breaks(p_obj))
+                    
+                    # Check if all translations already exist
+                    if len(existing_texts) >= len(translations):
+                        if all(_normalize_text(e) == _normalize_text(t) for e, t in zip(existing_texts[:len(translations)], translations)):
+                            skip_cnt += 1
+                            log(f"[SKIP] SDT 已存在翻譯: {seg.text[:30]}...")
+                            continue
+                    
+                    # Add translations to SDT content
+                    for t in translations:
+                        if not any(_normalize_text(t) == _normalize_text(e) for e in existing_texts):
+                            # Create new paragraph in SDT content
+                            new_p_element = OxmlElement("w:p")
+                            sdt_content.append(new_p_element)
+                            new_p = Paragraph(new_p_element, None)
+                            _add_formatted_run(new_p, t, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+                    
+                    ok_cnt += 1
+                    log(f"[SUCCESS] SDT 插入翻譯（交錯格式）")
+                    continue
+            
+            p: Paragraph = seg.ref
+            
+            # --- CONTEXT-AWARE INSERTION LOGIC (from successful version) ---
+            # Check if the paragraph's parent is a table cell
+            if isinstance(p._parent, _Cell):
+                cell = p._parent
+                
+                try:
+                    # Find the current paragraph's position in the cell
+                    cell_paragraphs = list(cell.paragraphs)
+                    p_index = -1
+                    for idx, cell_p in enumerate(cell_paragraphs):
+                        if cell_p._element == p._element:
+                            p_index = idx
+                            break
+                    
+                    if p_index == -1:
+                        log(f"[WARNING] 無法找到段落在單元格中的位置，使用原始方法")
+                        # Fallback to original method
+                        for block in translations:
+                            new_p = cell.add_paragraph()
+                            _add_formatted_run(new_p, block, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+                        ok_cnt += 1
+                        continue
+                    
+                    # Check if translations already exist right after this paragraph
+                    existing_texts = []
+                    check_limit = min(p_index + 1 + len(translations), len(cell_paragraphs))
+                    for idx in range(p_index + 1, check_limit):
+                        if _is_our_insert_block(cell_paragraphs[idx]):
+                            existing_texts.append(_p_text_with_breaks(cell_paragraphs[idx]))
+                    
+                    # Check if all translations already exist in order
+                    if len(existing_texts) >= len(translations):
+                        if all(_normalize_text(e) == _normalize_text(t) for e, t in zip(existing_texts[:len(translations)], translations)):
+                            skip_cnt += 1
+                            log(f"[SKIP] 表格單元格已存在翻譯: {seg.text[:30]}...")
+                            continue
+                    
+                    # Determine which translations need to be added
+                    to_add = []
+                    for t in translations:
+                        if not any(_normalize_text(t) == _normalize_text(e) for e in existing_texts):
+                            to_add.append(t)
+                    
+                    if not to_add:
+                        skip_cnt += 1
+                        log(f"[SKIP] 表格單元格所有翻譯已存在: {seg.text[:30]}...")
+                        continue
+                    
+                    # Insert new paragraphs right after the current paragraph
+                    insert_after = p
+                    for block in to_add:
+                        try:
+                            # Create new paragraph and insert it after the current position
+                            new_p_element = OxmlElement("w:p")
+                            insert_after._element.addnext(new_p_element)
+                            new_p = Paragraph(new_p_element, cell)
+                            _add_formatted_run(new_p, block, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+                            insert_after = new_p  # Update position for next insertion
+                        except Exception as e:
+                            log(f"[ERROR] 表格插入失敗: {e}, 嘗試fallback方法")
+                            # Fallback: add at the end of cell
+                            try:
+                                new_p = cell.add_paragraph()
+                                _add_formatted_run(new_p, block, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+                                log(f"[SUCCESS] Fallback插入成功")
+                            except Exception as e2:
+                                log(f"[FATAL] Fallback也失敗: {e2}")
+                                continue
+                    ok_cnt += 1
+                    log(f"[SUCCESS] 表格單元格插入 {len(to_add)} 個翻譯（緊接原文後）")
+                    
+                except Exception as e:
+                    log(f"[ERROR] 表格處理全面失敗: {e}, 跳過此段落")
+                    continue
+            
+            else:
+                # Normal paragraph (not in table cell) - SIMPLIFIED FOR DEBUGGING
+                try:
+                    # TEMPORARILY DISABLE existing translation check to force insertion
+                    log(f"[DEBUG] 強制插入翻譯到段落: {seg.text[:30]}...")
+                    
+                    # Force all translations to be added
+                    to_add = translations
+                    
+                    # Use simple positioning - always insert after current paragraph
+                    anchor = p
+                    
+                    for block in to_add:
+                        try:
+                            log(f"[DEBUG] 嘗試插入: {block[:50]}...")
+                            anchor = _append_after(anchor, block, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+                            log(f"[SUCCESS] _append_after成功插入")
+                        except Exception as e:
+                            log(f"[ERROR] _append_after失敗: {e}, 嘗試簡化插入")
+                            try:
+                                # Fallback: simple append 
+                                if hasattr(p._parent, 'add_paragraph'):
+                                    new_p = p._parent.add_paragraph()
+                                    _add_formatted_run(new_p, block, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+                                    log(f"[SUCCESS] Fallback段落插入成功")
+                                else:
+                                    log(f"[ERROR] 無法進行fallback插入")
+                            except Exception as e2:
+                                log(f"[FATAL] Fallback也失敗: {e2}")
+                                continue
+                    
+                    ok_cnt += 1
+                    log(f"[SUCCESS] 段落強制插入 {len(to_add)} 個翻譯")
+                    
+                except Exception as e:
+                    log(f"[ERROR] 段落處理失敗: {e}, 跳過此段落")
+                    continue
+
+        elif seg.kind == "table_cell":
+            # 處理表格儲存格翻譯插入
+            cell = seg.ref  # cell 是 _Cell 對象
+            
+            # 檢查儲存格是否已有翻譯
+            existing_translations = []
+            cell_paragraphs = list(cell.paragraphs)
+            
+            # 檢查儲存格末尾是否已有翻譯
+            translation_start_index = len(cell_paragraphs)
+            for i in range(len(cell_paragraphs) - 1, -1, -1):
+                if _is_our_insert_block(cell_paragraphs[i]):
+                    existing_translations.insert(0, _p_text_with_breaks(cell_paragraphs[i]))
+                    translation_start_index = i
+                else:
+                    break
+            
+            # 檢查是否所有翻譯都已存在且相同
+            if len(existing_translations) >= len(translations):
+                if all(_normalize_text(e) == _normalize_text(t) for e, t in zip(existing_translations[:len(translations)], translations)):
+                    skip_cnt += 1
+                    log(f"[SKIP] 表格儲存格已存在翻譯: {seg.text[:30]}...")
+                    continue
+            
+            # 移除舊的翻譯段落（如果有的話）
+            for i in range(len(cell_paragraphs) - 1, translation_start_index - 1, -1):
+                if _is_our_insert_block(cell_paragraphs[i]):
+                    cell._element.remove(cell_paragraphs[i]._element)
+            
+            # 檢查是否為簡單的短文本儲存格（只有原文，沒有複雜結構）
+            cell_content = cell.text.strip()
+            is_simple_cell = len(cell_content) <= 10 and cell_content == seg.text.strip()
+            
+            if is_simple_cell:
+                # 對於簡單短文本，直接替換內容而不是添加段落
+                log(f"[INFO] 簡單儲存格內容替換: '{seg.text.strip()}' -> '{translations[0] if translations else 'N/A'}'")
+                
+                # 清空所有段落內容
+                for para in cell.paragraphs:
+                    para.clear()
+                
+                # 在第一個段落中添加原文和翻譯
+                first_para = cell.paragraphs[0] if cell.paragraphs else cell.add_paragraph()
+                
+                # 添加原文
+                run_orig = first_para.add_run(seg.text.strip())
+                
+                # 添加換行和翻譯
+                for t in translations:
+                    first_para.add_run('\n')
+                    run_trans = first_para.add_run(t)
+                    run_trans.italic = True
+                    if INSERT_FONT_SIZE_PT:
+                        run_trans.font.size = Pt(INSERT_FONT_SIZE_PT)
+                
+                # 添加標記
+                tag_run = first_para.add_run("\u200b")
+                tag_run.italic = True
+                if INSERT_FONT_SIZE_PT:
+                    tag_run.font.size = Pt(INSERT_FONT_SIZE_PT)
+            else:
+                # 對於複雜儲存格，使用原有的添加段落方式
+                for t in translations:
+                    new_p = cell.add_paragraph()
+                    _add_formatted_run(new_p, t, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+            
+            ok_cnt += 1
+            log(f"[SUCCESS] 表格儲存格插入 {len(translations)} 個翻譯")
+
+        elif seg.kind == "txbx":
+            tx = seg.ref
+            # Check if textbox already has our translations at the end
+            if _txbx_tail_equals(tx, translations):
+                skip_cnt += 1
+                log(f"[SKIP] 文字框已存在翻譯: {seg.text[:30]}...")
+                continue
+            
+            # Append translations to textbox
+            for t in translations:
+                _txbx_append_paragraph(tx, t, italic=True, font_size_pt=INSERT_FONT_SIZE_PT)
+            
+            ok_cnt += 1
+            log(f"[SUCCESS] 文字框插入 {len(translations)} 個翻譯")
+    
+    return ok_cnt, skip_cnt
+
+# ---------- Main DocumentProcessor class ----------
+class DocumentProcessor:
+    """Enhanced document processor with complete DOCX handling capabilities."""
+    
+    def __init__(self):
+        self.logger = logger
+    
+    def extract_docx_segments(self, file_path: str) -> List[Segment]:
+        """Extract all translatable segments from DOCX file."""
+        try:
+            doc = docx.Document(file_path)
+            segments = _collect_docx_segments(doc)
+            
+            self.logger.info(f"Extracted {len(segments)} segments from {file_path}")
+            for seg in segments[:5]:  # Log first 5 segments for debugging
+                self.logger.debug(f"Segment: {seg.kind} | {seg.ctx} | {seg.text[:50]}...")
+            
+            return segments
+        
+        except Exception as e:
+            self.logger.error(f"Failed to extract DOCX segments from {file_path}: {str(e)}")
+            raise FileProcessingError(f"DOCX 文件分析失敗: {str(e)}")
+    
+    def _rematch_segments_to_document(self, doc: docx.Document, old_segments: List[Segment]) -> List[Segment]:
+        """Re-match segments from old document instance to new document instance."""
+        try:
+            # Extract fresh segments from the current document instance
+            fresh_segments = _collect_docx_segments(doc)
+            
+            # Match old segments with fresh segments based on text content
+            matched_segments = []
+            
+            for old_seg in old_segments:
+                # Find matching segment in fresh segments
+                matched = False
+                for fresh_seg in fresh_segments:
+                    if (old_seg.kind == fresh_seg.kind and 
+                        old_seg.ctx == fresh_seg.ctx and
+                        _normalize_text(old_seg.text) == _normalize_text(fresh_seg.text)):
+                        matched_segments.append(fresh_seg)
+                        matched = True
+                        break
+                
+                if not matched:
+                    self.logger.warning(f"Failed to match segment: {old_seg.text[:50]}...")
+                    # Still add the old segment but it might not work for insertion
+                    matched_segments.append(old_seg)
+            
+            self.logger.debug(f"Re-matched {len(matched_segments)} segments to current document")
+            return matched_segments
+            
+        except Exception as e:
+            self.logger.error(f"Failed to re-match segments: {str(e)}")
+            # Return original segments as fallback
+            return old_segments
+    
+    def insert_docx_translations(self, file_path: str, segments: List[Segment], 
+                                 translation_map: Dict[Tuple[str, str], str],
+                                 target_languages: List[str], output_path: str) -> Tuple[int, int]:
+        """Insert translations into DOCX file and save to output path."""
+        try:
+            doc = docx.Document(file_path)
+            
+            # CRITICAL FIX: Re-match segments with the current document instance
+            # The original segments were extracted from a different document instance
+            matched_segments = self._rematch_segments_to_document(doc, segments)
+            
+            def log_func(msg: str):
+                self.logger.debug(msg)
+            
+            ok_count, skip_count = _insert_docx_translations(
+                doc, matched_segments, translation_map, target_languages, log_func
+            )
+            
+            # Save the modified document
+            doc.save(output_path)
+            
+            self.logger.info(f"Inserted {ok_count} translations, skipped {skip_count}. Saved to: {output_path}")
+            return ok_count, skip_count
+        
+        except Exception as e:
+            self.logger.error(f"Failed to insert DOCX translations: {str(e)}")
+            raise FileProcessingError(f"DOCX 翻譯插入失敗: {str(e)}")
+    
+    def split_text_into_sentences(self, text: str, language: str = 'auto') -> List[str]:
+        """Split text into sentences using the best available method."""
+        return _split_sentences(text, language)
+    
+    def should_translate_text(self, text: str, source_language: str) -> bool:
+        """Determine if text should be translated."""
+        return should_translate(text, source_language)
+    
+    def insert_docx_combined_translations(self, file_path: str, segments: List[Segment], 
+                                         translation_map: Dict[Tuple[str, str], str],
+                                         target_languages: List[str], output_path: str) -> Tuple[int, int]:
+        """Insert all translations into a single DOCX file with combined multi-language output.
+        
+        This creates a combined file where each original text is followed by all translations
+        in the format: original\n英文\n越南文 etc.
+        """
+        try:
+            doc = docx.Document(file_path)
+            
+            # Re-match segments with the current document instance  
+            matched_segments = self._rematch_segments_to_document(doc, segments)
+            
+            def log_func(msg: str):
+                self.logger.debug(msg)
+            
+            # Use the existing _insert_docx_translations function which already supports
+            # multiple target languages in a single document
+            ok_count, skip_count = _insert_docx_translations(
+                doc, matched_segments, translation_map, target_languages, log_func
+            )
+            
+            # Save the combined document
+            doc.save(output_path)
+            
+            self.logger.info(f"Generated combined multi-language file: {output_path}")
+            self.logger.info(f"Inserted {ok_count} translations, skipped {skip_count}")
+            return ok_count, skip_count
+        
+        except Exception as e:
+            self.logger.error(f"Failed to create combined DOCX translations: {str(e)}")
+            raise FileProcessingError(f"組合多語言 DOCX 檔案生成失敗: {str(e)}")

app/services/notification_service.py

@@ -0,0 +1,645 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+通知服務
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import os
+import smtplib
+from email.mime.text import MIMEText
+from email.mime.multipart import MIMEMultipart
+from datetime import datetime, timedelta
+from typing import Optional, List, Dict, Any
+from flask import current_app, url_for
+from app import db
+from app.utils.logger import get_logger
+from app.models.job import TranslationJob
+from app.models.user import User
+from app.models.notification import Notification, NotificationType
+
+logger = get_logger(__name__)
+
+
+class NotificationService:
+    """通知服務"""
+    
+    def __init__(self):
+        self.smtp_server = current_app.config.get('SMTP_SERVER')
+        self.smtp_port = current_app.config.get('SMTP_PORT', 587)
+        self.use_tls = current_app.config.get('SMTP_USE_TLS', False)
+        self.use_ssl = current_app.config.get('SMTP_USE_SSL', False)
+        self.auth_required = current_app.config.get('SMTP_AUTH_REQUIRED', False)
+        self.sender_email = current_app.config.get('SMTP_SENDER_EMAIL')
+        self.sender_password = current_app.config.get('SMTP_SENDER_PASSWORD', '')
+        self.app_name = current_app.config.get('APP_NAME', 'PANJIT Document Translator')
+    
+    def _create_smtp_connection(self):
+        """建立 SMTP 連線"""
+        try:
+            if self.use_ssl:
+                server = smtplib.SMTP_SSL(self.smtp_server, self.smtp_port)
+            else:
+                server = smtplib.SMTP(self.smtp_server, self.smtp_port)
+                if self.use_tls:
+                    server.starttls()
+            
+            if self.auth_required and self.sender_password:
+                server.login(self.sender_email, self.sender_password)
+            
+            return server
+        except Exception as e:
+            logger.error(f"SMTP connection failed: {str(e)}")
+            return None
+    
+    def _send_email(self, to_email: str, subject: str, html_content: str, text_content: str = None) -> bool:
+        """發送郵件的基礎方法"""
+        try:
+            if not self.smtp_server or not self.sender_email:
+                logger.error("SMTP configuration incomplete")
+                return False
+            
+            # 建立郵件
+            msg = MIMEMultipart('alternative')
+            msg['From'] = f"{self.app_name} <{self.sender_email}>"
+            msg['To'] = to_email
+            msg['Subject'] = subject
+            
+            # 添加文本內容
+            if text_content:
+                text_part = MIMEText(text_content, 'plain', 'utf-8')
+                msg.attach(text_part)
+            
+            # 添加 HTML 內容
+            html_part = MIMEText(html_content, 'html', 'utf-8')
+            msg.attach(html_part)
+            
+            # 發送郵件
+            server = self._create_smtp_connection()
+            if not server:
+                return False
+            
+            server.send_message(msg)
+            server.quit()
+            
+            logger.info(f"Email sent successfully to {to_email}")
+            return True
+            
+        except Exception as e:
+            logger.error(f"Failed to send email to {to_email}: {str(e)}")
+            return False
+    
+    def send_job_completion_notification(self, job: TranslationJob) -> bool:
+        """發送任務完成通知"""
+        try:
+            if not job.user or not job.user.email:
+                logger.warning(f"No email address for job {job.job_uuid}")
+                return False
+            
+            # 準備郵件內容
+            subject = f"📄 翻譯完成通知 - {job.original_filename}"
+            
+            # 計算處理時間
+            processing_time = ""
+            if job.processing_started_at and job.completed_at:
+                duration = job.completed_at - job.processing_started_at
+                total_seconds = int(duration.total_seconds())
+                
+                if total_seconds < 60:
+                    processing_time = f"{total_seconds}秒"
+                elif total_seconds < 3600:
+                    minutes = total_seconds // 60
+                    seconds = total_seconds % 60
+                    processing_time = f"{minutes}分{seconds}秒"
+                else:
+                    hours = total_seconds // 3600
+                    minutes = (total_seconds % 3600) // 60
+                    processing_time = f"{hours}小時{minutes}分"
+            
+            # 生成下載連結（簡化版本）
+            download_links = []
+            for lang in job.target_languages:
+                download_links.append(f"• {lang}: [下載翻譯檔案]")
+            
+            html_content = f"""
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <meta charset="utf-8">
+                <style>
+                    body {{ font-family: Arial, sans-serif; line-height: 1.6; color: #333; }}
+                    .container {{ max-width: 600px; margin: 0 auto; padding: 20px; }}
+                    .header {{ background-color: #2563eb; color: white; padding: 20px; text-align: center; border-radius: 8px 8px 0 0; }}
+                    .content {{ background-color: #f8fafc; padding: 30px; border: 1px solid #e5e7eb; }}
+                    .info-box {{ background-color: #dbeafe; border-left: 4px solid #2563eb; padding: 15px; margin: 20px 0; }}
+                    .footer {{ background-color: #374151; color: #d1d5db; padding: 15px; text-align: center; font-size: 12px; border-radius: 0 0 8px 8px; }}
+                    .success {{ color: #059669; font-weight: bold; }}
+                    .download-section {{ margin: 20px 0; }}
+                    .download-link {{ display: inline-block; background-color: #2563eb; color: white; padding: 10px 20px; text-decoration: none; border-radius: 5px; margin: 5px; }}
+                </style>
+            </head>
+            <body>
+                <div class="container">
+                    <div class="header">
+                        <h1>🎉 翻譯任務完成</h1>
+                    </div>
+                    
+                    <div class="content">
+                        <p>親愛的 <strong>{job.user.display_name}</strong>，</p>
+                        
+                        <p class="success">您的文件翻譯任務已成功完成！</p>
+                        
+                        <div class="info-box">
+                            <h3>📋 任務詳細資訊</h3>
+                            <p><strong>檔案名稱:</strong> {job.original_filename}</p>
+                            <p><strong>任務編號:</strong> {job.job_uuid}</p>
+                            <p><strong>來源語言:</strong> {job.source_language}</p>
+                            <p><strong>目標語言:</strong> {', '.join(job.target_languages)}</p>
+                            <p><strong>處理時間:</strong> {processing_time}</p>
+                            <p><strong>完成時間:</strong> {job.completed_at.strftime('%Y-%m-%d %H:%M:%S') if job.completed_at else '未知'}</p>
+                            {f'<p><strong>總成本:</strong> ${job.total_cost:.4f}</p>' if job.total_cost else ''}
+                        </div>
+                        
+                        <div class="download-section">
+                            <h3>📥 下載翻譯檔案</h3>
+                            <p>請登入系統下載您的翻譯檔案：</p>
+                            <p>{'<br>'.join(download_links)}</p>
+                            <p style="margin-top: 15px;">
+                                <strong>注意:</strong> 翻譯檔案將在系統中保留 7 天，請及時下載。
+                            </p>
+                        </div>
+                        
+                        <div style="margin-top: 30px; padding-top: 20px; border-top: 1px solid #e5e7eb;">
+                            <p>感謝您使用 {self.app_name}！</p>
+                            <p>如有任何問題，請聯繫系統管理員。</p>
+                        </div>
+                    </div>
+                    
+                    <div class="footer">
+                        <p>此郵件由 {self.app_name} 系統自動發送，請勿回覆。</p>
+                        <p>發送時間: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}</p>
+                    </div>
+                </div>
+            </body>
+            </html>
+            """
+            
+            # 純文字版本
+            text_content = f"""
+            翻譯任務完成通知
+            
+            親愛的 {job.user.display_name}，
+            
+            您的文件翻譯任務已成功完成！
+            
+            任務詳細資訊:
+            - 檔案名稱: {job.original_filename}
+            - 任務編號: {job.job_uuid}
+            - 來源語言: {job.source_language}
+            - 目標語言: {', '.join(job.target_languages)}
+            - 處理時間: {processing_time}
+            - 完成時間: {job.completed_at.strftime('%Y-%m-%d %H:%M:%S') if job.completed_at else '未知'}
+            
+            請登入系統下載您的翻譯檔案。翻譯檔案將在系統中保留 7 天。
+            
+            感謝您使用 {self.app_name}！
+            
+            ----
+            此郵件由系統自動發送，請勿回覆。
+            """
+            
+            return self._send_email(job.user.email, subject, html_content, text_content)
+        
+        except Exception as e:
+            logger.error(f"Failed to send completion notification for job {job.job_uuid}: {str(e)}")
+            return False
+    
+    def send_job_failure_notification(self, job: TranslationJob) -> bool:
+        """發送任務失敗通知"""
+        try:
+            if not job.user or not job.user.email:
+                logger.warning(f"No email address for job {job.job_uuid}")
+                return False
+            
+            subject = f"⚠️ 翻譯失敗通知 - {job.original_filename}"
+            
+            html_content = f"""
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <meta charset="utf-8">
+                <style>
+                    body {{ font-family: Arial, sans-serif; line-height: 1.6; color: #333; }}
+                    .container {{ max-width: 600px; margin: 0 auto; padding: 20px; }}
+                    .header {{ background-color: #dc2626; color: white; padding: 20px; text-align: center; border-radius: 8px 8px 0 0; }}
+                    .content {{ background-color: #f8fafc; padding: 30px; border: 1px solid #e5e7eb; }}
+                    .error-box {{ background-color: #fef2f2; border-left: 4px solid #dc2626; padding: 15px; margin: 20px 0; }}
+                    .footer {{ background-color: #374151; color: #d1d5db; padding: 15px; text-align: center; font-size: 12px; border-radius: 0 0 8px 8px; }}
+                    .error {{ color: #dc2626; font-weight: bold; }}
+                </style>
+            </head>
+            <body>
+                <div class="container">
+                    <div class="header">
+                        <h1>❌ 翻譯任務失敗</h1>
+                    </div>
+                    
+                    <div class="content">
+                        <p>親愛的 <strong>{job.user.display_name}</strong>，</p>
+                        
+                        <p class="error">很抱歉，您的文件翻譯任務處理失敗。</p>
+                        
+                        <div class="error-box">
+                            <h3>📋 任務資訊</h3>
+                            <p><strong>檔案名稱:</strong> {job.original_filename}</p>
+                            <p><strong>任務編號:</strong> {job.job_uuid}</p>
+                            <p><strong>重試次數:</strong> {job.retry_count}</p>
+                            <p><strong>錯誤訊息:</strong> {job.error_message or '未知錯誤'}</p>
+                            <p><strong>失敗時間:</strong> {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}</p>
+                        </div>
+                        
+                        <div style="margin-top: 20px;">
+                            <p><strong>建議處理方式:</strong></p>
+                            <ul>
+                                <li>檢查檔案格式是否正確</li>
+                                <li>確認檔案沒有損壞</li>
+                                <li>稍後再次嘗試上傳</li>
+                                <li>如問題持續，請聯繫系統管理員</li>
+                            </ul>
+                        </div>
+                        
+                        <div style="margin-top: 30px; padding-top: 20px; border-top: 1px solid #e5e7eb;">
+                            <p>如需協助，請聯繫系統管理員。</p>
+                        </div>
+                    </div>
+                    
+                    <div class="footer">
+                        <p>此郵件由 {self.app_name} 系統自動發送，請勿回覆。</p>
+                        <p>發送時間: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}</p>
+                    </div>
+                </div>
+            </body>
+            </html>
+            """
+            
+            text_content = f"""
+            翻譯任務失敗通知
+            
+            親愛的 {job.user.display_name}，
+            
+            很抱歉，您的文件翻譯任務處理失敗。
+            
+            任務資訊:
+            - 檔案名稱: {job.original_filename}
+            - 任務編號: {job.job_uuid}
+            - 重試次數: {job.retry_count}
+            - 錯誤訊息: {job.error_message or '未知錯誤'}
+            
+            建議處理方式:
+            1. 檢查檔案格式是否正確
+            2. 確認檔案沒有損壞
+            3. 稍後再次嘗試上傳
+            4. 如問題持續，請聯繫系統管理員
+            
+            如需協助，請聯繫系統管理員。
+            
+            ----
+            此郵件由 {self.app_name} 系統自動發送，請勿回覆。
+            """
+            
+            return self._send_email(job.user.email, subject, html_content, text_content)
+        
+        except Exception as e:
+            logger.error(f"Failed to send failure notification for job {job.job_uuid}: {str(e)}")
+            return False
+    
+    def send_admin_notification(self, subject: str, message: str, admin_emails: List[str] = None) -> bool:
+        """發送管理員通知"""
+        try:
+            if not admin_emails:
+                # 取得所有管理員郵件地址
+                admin_users = User.get_admin_users()
+                admin_emails = [user.email for user in admin_users if user.email]
+            
+            if not admin_emails:
+                logger.warning("No admin email addresses found")
+                return False
+            
+            html_content = f"""
+            <!DOCTYPE html>
+            <html>
+            <head>
+                <meta charset="utf-8">
+                <style>
+                    body {{ font-family: Arial, sans-serif; line-height: 1.6; color: #333; }}
+                    .container {{ max-width: 600px; margin: 0 auto; padding: 20px; }}
+                    .header {{ background-color: #f59e0b; color: white; padding: 20px; text-align: center; border-radius: 8px 8px 0 0; }}
+                    .content {{ background-color: #f8fafc; padding: 30px; border: 1px solid #e5e7eb; }}
+                    .footer {{ background-color: #374151; color: #d1d5db; padding: 15px; text-align: center; font-size: 12px; border-radius: 0 0 8px 8px; }}
+                </style>
+            </head>
+            <body>
+                <div class="container">
+                    <div class="header">
+                        <h1>🔔 系統管理通知</h1>
+                    </div>
+                    
+                    <div class="content">
+                        <p>系統管理員您好，</p>
+                        
+                        <div style="background-color: #fef3c7; border-left: 4px solid #f59e0b; padding: 15px; margin: 20px 0;">
+                            <h3>{subject}</h3>
+                            <p>{message}</p>
+                        </div>
+                        
+                        <p>發送時間: {datetime.now().strftime('%Y-%m-%d %H:%M:%S')}</p>
+                    </div>
+                    
+                    <div class="footer">
+                        <p>此郵件由 {self.app_name} 系統自動發送，請勿回覆。</p>
+                    </div>
+                </div>
+            </body>
+            </html>
+            """
+            
+            success_count = 0
+            for email in admin_emails:
+                if self._send_email(email, f"[管理通知] {subject}", html_content):
+                    success_count += 1
+            
+            return success_count > 0
+        
+        except Exception as e:
+            logger.error(f"Failed to send admin notification: {str(e)}")
+            return False
+    
+    def test_smtp_connection(self) -> bool:
+        """測試 SMTP 連線"""
+        try:
+            server = self._create_smtp_connection()
+            if server:
+                server.quit()
+                return True
+            return False
+        except Exception as e:
+            logger.error(f"SMTP connection test failed: {str(e)}")
+            return False
+    
+    # ========== 資料庫通知方法 ==========
+    
+    def create_db_notification(
+        self,
+        user_id: int,
+        title: str,
+        message: str,
+        notification_type: NotificationType = NotificationType.INFO,
+        job_uuid: Optional[str] = None,
+        extra_data: Optional[Dict[str, Any]] = None,
+        expires_at: Optional[datetime] = None,
+        link: Optional[str] = None
+    ) -> Optional[Notification]:
+        """
+        創建資料庫通知
+        
+        Args:
+            user_id: 用戶ID
+            title: 通知標題
+            message: 通知內容
+            notification_type: 通知類型
+            job_uuid: 關聯任務UUID
+            extra_data: 額外數據
+            expires_at: 過期時間
+            link: 相關連結
+        
+        Returns:
+            Notification: 創建的通知對象
+        """
+        try:
+            # 如果沒有指定連結但有任務UUID，自動生成任務詳情連結
+            if not link and job_uuid:
+                link = f"/job/{job_uuid}"
+            
+            notification = Notification(
+                user_id=user_id,
+                type=notification_type.value,
+                title=title,
+                message=message,
+                job_uuid=job_uuid,
+                link=link,
+                extra_data=extra_data,
+                expires_at=expires_at
+            )
+            
+            db.session.add(notification)
+            db.session.commit()
+            
+            logger.info(f"資料庫通知已創建: {notification.notification_uuid} for user {user_id}")
+            
+            # 觸發 WebSocket 推送
+            self._send_websocket_notification(notification)
+            
+            return notification
+            
+        except Exception as e:
+            db.session.rollback()
+            logger.error(f"創建資料庫通知失敗: {e}")
+            return None
+    
+    def send_job_started_db_notification(self, job: TranslationJob) -> Optional[Notification]:
+        """
+        發送任務開始處理的資料庫通知
+        
+        Args:
+            job: 翻譯任務對象
+        
+        Returns:
+            Notification: 創建的通知對象
+        """
+        try:
+            title = "翻譯任務開始處理"
+            message = f'您的文件「{job.original_filename}」已開始翻譯處理。'
+            
+            if job.target_languages:
+                languages = ', '.join(job.target_languages)
+                message += f" 目標語言: {languages}"
+            
+            return self.create_db_notification(
+                user_id=job.user_id,
+                title=title,
+                message=message,
+                notification_type=NotificationType.INFO,
+                job_uuid=job.job_uuid,
+                extra_data={
+                    'filename': job.original_filename,
+                    'target_languages': job.target_languages,
+                    'started_at': job.processing_started_at.isoformat() if job.processing_started_at else None
+                }
+            )
+            
+        except Exception as e:
+            logger.error(f"發送任務開始資料庫通知失敗: {e}")
+            return None
+    
+    def send_job_completion_db_notification(self, job: TranslationJob) -> Optional[Notification]:
+        """
+        發送任務完成的資料庫通知
+        
+        Args:
+            job: 翻譯任務對象
+        
+        Returns:
+            Notification: 創建的通知對象
+        """
+        try:
+            if job.status != 'COMPLETED':
+                logger.warning(f"任務 {job.job_uuid} 狀態不是已完成，跳過完成通知")
+                return None
+            
+            # 構建通知內容
+            title = "翻譯任務完成"
+            message = f'您的文件「{job.original_filename}」已成功翻譯完成。'
+            
+            # 添加目標語言信息
+            if job.target_languages:
+                languages = ', '.join(job.target_languages)
+                message += f" 目標語言: {languages}"
+            
+            # 添加處理時間信息
+            if job.processing_started_at and job.completed_at:
+                duration = job.completed_at - job.processing_started_at
+                minutes = int(duration.total_seconds() / 60)
+                if minutes > 0:
+                    message += f" 處理時間: {minutes} 分鐘"
+                else:
+                    message += f" 處理時間: {int(duration.total_seconds())} 秒"
+            
+            return self.create_db_notification(
+                user_id=job.user_id,
+                title=title,
+                message=message,
+                notification_type=NotificationType.SUCCESS,
+                job_uuid=job.job_uuid,
+                extra_data={
+                    'filename': job.original_filename,
+                    'target_languages': job.target_languages,
+                    'total_cost': float(job.total_cost) if job.total_cost else 0,
+                    'completed_at': job.completed_at.isoformat() if job.completed_at else None
+                }
+            )
+            
+        except Exception as e:
+            logger.error(f"發送任務完成資料庫通知失敗: {e}")
+            return None
+    
+    def send_job_completion_db_notification_direct(self, job: TranslationJob) -> Optional[Notification]:
+        """
+        直接發送任務完成的資料庫通知（不檢查狀態）
+        """
+        try:
+            # 構建通知內容
+            title = "翻譯任務完成"
+            message = f'您的文件「{job.original_filename}」已成功翻譯完成。'
+            
+            # 添加目標語言信息
+            if job.target_languages:
+                languages = ', '.join(job.target_languages)
+                message += f" 目標語言: {languages}"
+            
+            message += " 您可以在任務列表中下載翻譯結果。"
+            
+            # 創建資料庫通知
+            return self.create_db_notification(
+                user_id=job.user_id,
+                title=title,
+                message=message,
+                notification_type=NotificationType.SUCCESS,
+                job_uuid=job.job_uuid,
+                extra_data={
+                    'filename': job.original_filename,
+                    'target_languages': job.target_languages,
+                    'total_cost': float(job.total_cost) if job.total_cost else 0,
+                    'completed_at': job.completed_at.isoformat() if job.completed_at else None
+                }
+            )
+            
+        except Exception as e:
+            logger.error(f"發送任務完成資料庫通知失敗: {e}")
+            return None
+    
+    def send_job_failure_db_notification(self, job: TranslationJob, error_message: str = None) -> Optional[Notification]:
+        """
+        發送任務失敗的資料庫通知
+        
+        Args:
+            job: 翻譯任務對象
+            error_message: 錯誤訊息
+        
+        Returns:
+            Notification: 創建的通知對象
+        """
+        try:
+            title = "翻譯任務失敗"
+            message = f'您的文件「{job.original_filename}」翻譯失敗。'
+            
+            if error_message:
+                message += f" 錯誤訊息: {error_message}"
+            
+            if job.retry_count > 0:
+                message += f" 已重試 {job.retry_count} 次。"
+            
+            return self.create_db_notification(
+                user_id=job.user_id,
+                title=title,
+                message=message,
+                notification_type=NotificationType.ERROR,
+                job_uuid=job.job_uuid,
+                extra_data={
+                    'filename': job.original_filename,
+                    'error_message': error_message,
+                    'retry_count': job.retry_count,
+                    'failed_at': datetime.now().isoformat()
+                }
+            )
+            
+        except Exception as e:
+            logger.error(f"發送任務失敗資料庫通知失敗: {e}")
+            return None
+    
+    def _send_websocket_notification(self, notification: Notification):
+        """
+        通過 WebSocket 發送通知
+        
+        Args:
+            notification: 通知對象
+        """
+        try:
+            from app.websocket import send_notification_to_user
+            send_notification_to_user(notification.user_id, notification.to_dict())
+        except Exception as e:
+            logger.error(f"WebSocket 推送通知失敗: {e}")
+    
+    def get_unread_count(self, user_id: int) -> int:
+        """
+        獲取用戶未讀通知數量
+        
+        Args:
+            user_id: 用戶ID
+        
+        Returns:
+            int: 未讀通知數量
+        """
+        try:
+            return Notification.query.filter_by(
+                user_id=user_id,
+                is_read=False
+            ).filter(
+                (Notification.expires_at.is_(None)) | 
+                (Notification.expires_at > datetime.now())
+            ).count()
+        except Exception as e:
+            logger.error(f"獲取未讀通知數量失敗: {e}")
+            return 0

app/tasks/__init__.py

@@ -0,0 +1,16 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Celery 任務模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from .translation import process_translation_job, cleanup_old_files
+
+__all__ = [
+    'process_translation_job',
+    'cleanup_old_files'
+]

app/tasks/translation.py

@@ -0,0 +1,350 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+翻譯相關 Celery 任務
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import os
+import shutil
+from datetime import datetime, timedelta
+from pathlib import Path
+from celery import Celery, current_task
+from celery.schedules import crontab
+from app import create_app, db
+
+logger = None
+
+def get_celery_instance():
+    """取得 Celery 實例"""
+    app = create_app()
+    return app.celery
+
+# 建立 Celery 實例
+celery = get_celery_instance()
+
+# 初始化 logger
+from app.utils.logger import get_logger
+logger = get_logger(__name__)
+
+from app.models.job import TranslationJob
+from app.models.log import SystemLog
+from app.services.translation_service import TranslationService
+from app.services.notification_service import NotificationService
+from app.utils.exceptions import TranslationError
+
+
+@celery.task(bind=True, max_retries=3)
+def process_translation_job(self, job_id: int):
+    """處理翻譯任務"""
+    app = create_app()
+    
+    with app.app_context():
+        try:
+            # 取得任務資訊
+            job = TranslationJob.query.get(job_id)
+            if not job:
+                raise ValueError(f"Job {job_id} not found")
+            
+            logger.info(f"Starting translation job processing: {job.job_uuid}")
+            
+            # 記錄任務開始
+            SystemLog.info(
+                'tasks.translation',
+                f'Translation job started: {job.job_uuid}',
+                user_id=job.user_id,
+                job_id=job.id,
+                extra_data={
+                    'filename': job.original_filename,
+                    'target_languages': job.target_languages,
+                    'retry_count': self.request.retries
+                }
+            )
+            
+            # 建立翻譯服務
+            translation_service = TranslationService()
+            
+            # 執行翻譯
+            result = translation_service.translate_document(job.job_uuid)
+            
+            if result['success']:
+                logger.info(f"Translation job completed successfully: {job.job_uuid}")
+                
+                # 重新獲取任務以確保狀態是最新的
+                db.session.refresh(job)
+                
+                # 發送完成通知
+                try:
+                    notification_service = NotificationService()
+                    # 發送郵件通知
+                    notification_service.send_job_completion_notification(job)
+                    # 發送資料庫通知 - 跳過狀態檢查，直接發送
+                    notification_service.send_job_completion_db_notification_direct(job)
+                except Exception as e:
+                    logger.warning(f"Failed to send completion notification: {str(e)}")
+                
+                # 記錄完成日誌
+                SystemLog.info(
+                    'tasks.translation',
+                    f'Translation job completed: {job.job_uuid}',
+                    user_id=job.user_id,
+                    job_id=job.id,
+                    extra_data={
+                        'total_cost': result.get('total_cost', 0),
+                        'total_sentences': result.get('total_sentences', 0),
+                        'output_files': list(result.get('output_files', {}).keys())
+                    }
+                )
+            else:
+                raise TranslationError(result.get('error', 'Unknown translation error'))
+        
+        except Exception as exc:
+            logger.error(f"Translation job failed: {job.job_uuid}. Error: {str(exc)}")
+            
+            with app.app_context():
+                # 更新任務狀態
+                job = TranslationJob.query.get(job_id)
+                if job:
+                    job.error_message = str(exc)
+                    job.retry_count = self.request.retries + 1
+                    
+                    if self.request.retries < self.max_retries:
+                        # 準備重試
+                        job.update_status('RETRY')
+                        
+                        # 計算重試延遲：30s, 60s, 120s
+                        countdown = [30, 60, 120][self.request.retries]
+                        
+                        SystemLog.warning(
+                            'tasks.translation',
+                            f'Translation job retry scheduled: {job.job_uuid} (attempt {self.request.retries + 2})',
+                            user_id=job.user_id,
+                            job_id=job.id,
+                            extra_data={
+                                'error': str(exc),
+                                'retry_count': self.request.retries + 1,
+                                'countdown': countdown
+                            }
+                        )
+                        
+                        logger.info(f"Retrying translation job in {countdown}s: {job.job_uuid}")
+                        raise self.retry(exc=exc, countdown=countdown)
+                    
+                    else:
+                        # 重試次數用盡，標記失敗
+                        job.update_status('FAILED')
+                        
+                        # 發送失敗通知
+                        try:
+                            notification_service = NotificationService()
+                            # 發送郵件通知
+                            notification_service.send_job_failure_notification(job)
+                            # 發送資料庫通知
+                            notification_service.send_job_failure_db_notification(job, str(exc))
+                        except Exception as e:
+                            logger.warning(f"Failed to send failure notification: {str(e)}")
+                        
+                        SystemLog.error(
+                            'tasks.translation',
+                            f'Translation job failed permanently: {job.job_uuid}',
+                            user_id=job.user_id,
+                            job_id=job.id,
+                            extra_data={
+                                'error': str(exc),
+                                'total_retries': self.request.retries
+                            }
+                        )
+                        
+                        # 發送失敗通知
+                        try:
+                            notification_service = NotificationService()
+                            notification_service.send_job_failure_notification(job)
+                        except Exception as e:
+                            logger.warning(f"Failed to send failure notification: {str(e)}")
+                        
+                        logger.error(f"Translation job failed permanently: {job.job_uuid}")
+            
+            raise exc
+
+
+@celery.task
+def cleanup_old_files():
+    """清理舊檔案（定期任務）"""
+    app = create_app()
+    
+    with app.app_context():
+        try:
+            logger.info("Starting file cleanup task")
+            
+            upload_folder = Path(app.config.get('UPLOAD_FOLDER'))
+            retention_days = app.config.get('FILE_RETENTION_DAYS', 7)
+            cutoff_date = datetime.utcnow() - timedelta(days=retention_days)
+            
+            if not upload_folder.exists():
+                logger.warning(f"Upload folder does not exist: {upload_folder}")
+                return
+            
+            deleted_files = 0
+            deleted_dirs = 0
+            total_size_freed = 0
+            
+            # 遍歷上傳目錄中的所有 UUID 目錄
+            for item in upload_folder.iterdir():
+                if not item.is_dir():
+                    continue
+                
+                try:
+                    # 檢查目錄的修改時間
+                    dir_mtime = datetime.fromtimestamp(item.stat().st_mtime)
+                    
+                    if dir_mtime < cutoff_date:
+                        # 計算目錄大小
+                        dir_size = sum(f.stat().st_size for f in item.rglob('*') if f.is_file())
+                        
+                        # 檢查是否還有相關的資料庫記錄
+                        job_uuid = item.name
+                        job = TranslationJob.query.filter_by(job_uuid=job_uuid).first()
+                        
+                        if job:
+                            # 檢查任務是否已完成且超過保留期
+                            if job.completed_at and job.completed_at < cutoff_date:
+                                # 刪除目錄
+                                shutil.rmtree(item)
+                                deleted_dirs += 1
+                                total_size_freed += dir_size
+                                
+                                logger.info(f"Cleaned up job directory: {job_uuid}")
+                                
+                                # 記錄清理日誌
+                                SystemLog.info(
+                                    'tasks.cleanup',
+                                    f'Cleaned up files for completed job: {job_uuid}',
+                                    user_id=job.user_id,
+                                    job_id=job.id,
+                                    extra_data={
+                                        'files_size_mb': dir_size / (1024 * 1024),
+                                        'retention_days': retention_days
+                                    }
+                                )
+                        else:
+                            # 沒有對應的資料庫記錄，直接刪除
+                            shutil.rmtree(item)
+                            deleted_dirs += 1
+                            total_size_freed += dir_size
+                            
+                            logger.info(f"Cleaned up orphaned directory: {job_uuid}")
+                
+                except Exception as e:
+                    logger.error(f"Failed to process directory {item}: {str(e)}")
+                    continue
+            
+            # 記錄清理結果
+            cleanup_result = {
+                'deleted_directories': deleted_dirs,
+                'total_size_freed_mb': total_size_freed / (1024 * 1024),
+                'retention_days': retention_days,
+                'cutoff_date': cutoff_date.isoformat()
+            }
+            
+            SystemLog.info(
+                'tasks.cleanup',
+                f'File cleanup completed: {deleted_dirs} directories, {total_size_freed / (1024 * 1024):.2f} MB freed',
+                extra_data=cleanup_result
+            )
+            
+            logger.info(f"File cleanup completed: {cleanup_result}")
+            
+            return cleanup_result
+        
+        except Exception as e:
+            logger.error(f"File cleanup task failed: {str(e)}")
+            
+            SystemLog.error(
+                'tasks.cleanup',
+                f'File cleanup task failed: {str(e)}',
+                extra_data={'error': str(e)}
+            )
+            
+            raise e
+
+
+@celery.task
+def send_daily_admin_report():
+    """發送每日管理員報告"""
+    app = create_app()
+    
+    with app.app_context():
+        try:
+            logger.info("Generating daily admin report")
+            
+            from app.models.stats import APIUsageStats
+            from app.services.notification_service import NotificationService
+            
+            # 取得昨日統計
+            yesterday = datetime.utcnow() - timedelta(days=1)
+            daily_stats = APIUsageStats.get_daily_statistics(days=1)
+            
+            # 取得系統錯誤摘要
+            error_summary = SystemLog.get_error_summary(days=1)
+            
+            # 準備報告內容
+            if daily_stats:
+                yesterday_data = daily_stats[0]
+                subject = f"每日系統報告 - {yesterday_data['date']}"
+                
+                message = f"""
+                昨日系統使用狀況：
+                • 翻譯任務: {yesterday_data['total_calls']} 個
+                • 成功任務: {yesterday_data['successful_calls']} 個
+                • 失敗任務: {yesterday_data['failed_calls']} 個
+                • 總成本: ${yesterday_data['total_cost']:.4f}
+                • 總 Token 數: {yesterday_data['total_tokens']}
+                
+                系統錯誤摘要：
+                • 錯誤數量: {error_summary['total_errors']}
+                
+                請查看管理後台了解詳細資訊。
+                """
+            else:
+                subject = f"每日系統報告 - {yesterday.strftime('%Y-%m-%d')}"
+                message = "昨日無翻譯任務記錄。"
+            
+            # 發送管理員通知
+            notification_service = NotificationService()
+            result = notification_service.send_admin_notification(subject, message)
+            
+            if result:
+                logger.info("Daily admin report sent successfully")
+            else:
+                logger.warning("Failed to send daily admin report")
+            
+            return result
+        
+        except Exception as e:
+            logger.error(f"Daily admin report task failed: {str(e)}")
+            raise e
+
+
+# 定期任務設定
+@celery.on_after_configure.connect
+def setup_periodic_tasks(sender, **kwargs):
+    """設定定期任務"""
+    
+    # 每日凌晨 2 點執行檔案清理
+    sender.add_periodic_task(
+        crontab(hour=2, minute=0),
+        cleanup_old_files.s(),
+        name='cleanup-old-files-daily'
+    )
+    
+    # 每日早上 8 點發送管理員報告
+    sender.add_periodic_task(
+        crontab(hour=8, minute=0),
+        send_daily_admin_report.s(),
+        name='daily-admin-report'
+    )
+
+

app/utils/__init__.py

@@ -0,0 +1,34 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+工具模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from .decorators import login_required, admin_required
+from .validators import validate_file, validate_languages
+from .helpers import generate_filename, format_file_size
+from .exceptions import (
+    DocumentTranslatorError,
+    AuthenticationError,
+    ValidationError,
+    TranslationError,
+    FileProcessingError
+)
+
+__all__ = [
+    'login_required',
+    'admin_required',
+    'validate_file',
+    'validate_languages',
+    'generate_filename',
+    'format_file_size',
+    'DocumentTranslatorError',
+    'AuthenticationError',
+    'ValidationError',
+    'TranslationError',
+    'FileProcessingError'
+]

app/utils/decorators.py

@@ -0,0 +1,238 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+裝飾器模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from functools import wraps
+from flask import session, jsonify, g, current_app
+from flask_jwt_extended import jwt_required, get_jwt_identity, get_jwt
+
+
+def login_required(f):
+    """登入驗證裝飾器"""
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        from app.utils.logger import get_logger
+        from flask import request
+        logger = get_logger(__name__)
+        
+        user_id = session.get('user_id')
+        
+        # 調試：記錄 session 檢查
+        logger.info(f"🔐 [Session Check] Endpoint: {request.endpoint}, Method: {request.method}, URL: {request.url}")
+        logger.info(f"🔐 [Session Data] UserID: {user_id}, SessionData: {dict(session)}, SessionID: {session.get('_id', 'unknown')}")
+        
+        if not user_id:
+            logger.warning(f"❌ [Auth Failed] No user_id in session for {request.endpoint}")
+            return jsonify({
+                'success': False,
+                'error': 'AUTHENTICATION_REQUIRED',
+                'message': '請先登入'
+            }), 401
+        
+        # 取得使用者資訊並設定到 g 物件
+        from app.models import User
+        user = User.query.get(user_id)
+        if not user:
+            # 清除無效的 session
+            session.clear()
+            return jsonify({
+                'success': False,
+                'error': 'USER_NOT_FOUND',
+                'message': '使用者不存在'
+            }), 401
+        
+        g.current_user = user
+        g.current_user_id = user.id
+        g.is_admin = user.is_admin
+        
+        return f(*args, **kwargs)
+    
+    return decorated_function
+
+
+def jwt_login_required(f):
+    """JWT 登入驗證裝飾器"""
+    @wraps(f)
+    @jwt_required()
+    def decorated_function(*args, **kwargs):
+        from app.utils.logger import get_logger
+        from flask import request
+        logger = get_logger(__name__)
+        
+        try:
+            username = get_jwt_identity()
+            claims = get_jwt()
+            
+            # 設定到 g 物件供其他地方使用
+            g.current_user_username = username
+            g.current_user_id = claims.get('user_id')
+            g.is_admin = claims.get('is_admin', False)
+            
+            logger.info(f"🔑 [JWT Auth] User: {username}, UserID: {claims.get('user_id')}, Admin: {claims.get('is_admin')}")
+            
+        except Exception as e:
+            logger.error(f"❌ [JWT Auth] JWT validation failed: {str(e)}")
+            return jsonify({
+                'success': False,
+                'error': 'AUTHENTICATION_REQUIRED',
+                'message': '認證失效，請重新登入'
+            }), 401
+        
+        return f(*args, **kwargs)
+    
+    return decorated_function
+
+
+def admin_required(f):
+    """管理員權限裝飾器（使用JWT認證）"""
+    @wraps(f)
+    @jwt_required()
+    def decorated_function(*args, **kwargs):
+        from app.utils.logger import get_logger
+        from flask import request
+        logger = get_logger(__name__)
+        
+        try:
+            username = get_jwt_identity()
+            claims = get_jwt()
+            
+            # 設定到 g 物件供其他地方使用
+            g.current_user_username = username
+            g.current_user_id = claims.get('user_id')
+            g.is_admin = claims.get('is_admin', False)
+            
+            logger.info(f"🔑 [JWT Admin Auth] User: {username}, UserID: {claims.get('user_id')}, Admin: {claims.get('is_admin')}")
+            
+            # 檢查管理員權限
+            if not claims.get('is_admin', False):
+                logger.warning(f"❌ [Admin Auth] Permission denied for user: {username}")
+                return jsonify({
+                    'success': False,
+                    'error': 'PERMISSION_DENIED',
+                    'message': '權限不足，需要管理員權限'
+                }), 403
+                
+            # 驗證用戶是否存在且仍為管理員
+            from app.models import User
+            user = User.query.get(claims.get('user_id'))
+            if not user:
+                logger.error(f"❌ [Admin Auth] User not found: {claims.get('user_id')}")
+                return jsonify({
+                    'success': False,
+                    'error': 'USER_NOT_FOUND',
+                    'message': '使用者不存在'
+                }), 401
+                
+            if not user.is_admin:
+                logger.warning(f"❌ [Admin Auth] User no longer admin: {username}")
+                return jsonify({
+                    'success': False,
+                    'error': 'PERMISSION_DENIED',
+                    'message': '權限不足，需要管理員權限'
+                }), 403
+            
+            # 設定完整用戶資訊
+            g.current_user = user
+            
+        except Exception as e:
+            logger.error(f"❌ [Admin Auth] JWT validation failed: {str(e)}")
+            return jsonify({
+                'success': False,
+                'error': 'AUTHENTICATION_REQUIRED',
+                'message': '認證失效，請重新登入'
+            }), 401
+        
+        return f(*args, **kwargs)
+    
+    return decorated_function
+
+
+def validate_json(required_fields=None):
+    """JSON 驗證裝飾器"""
+    def decorator(f):
+        @wraps(f)
+        def decorated_function(*args, **kwargs):
+            from flask import request
+            
+            if not request.is_json:
+                return jsonify({
+                    'success': False,
+                    'error': 'INVALID_CONTENT_TYPE',
+                    'message': '請求必須為 JSON 格式'
+                }), 400
+            
+            data = request.get_json()
+            if not data:
+                return jsonify({
+                    'success': False,
+                    'error': 'INVALID_JSON',
+                    'message': 'JSON 資料格式錯誤'
+                }), 400
+            
+            # 檢查必要欄位
+            if required_fields:
+                missing_fields = [field for field in required_fields if field not in data]
+                if missing_fields:
+                    return jsonify({
+                        'success': False,
+                        'error': 'MISSING_FIELDS',
+                        'message': f'缺少必要欄位: {", ".join(missing_fields)}'
+                    }), 400
+            
+            return f(*args, **kwargs)
+        
+        return decorated_function
+    return decorator
+
+
+def rate_limit(max_requests=100, per_seconds=3600):
+    """簡單的速率限制裝飾器"""
+    def decorator(f):
+        @wraps(f)
+        def decorated_function(*args, **kwargs):
+            from flask import request
+            import redis
+            import time
+            
+            try:
+                # 使用 Redis 進行速率限制
+                redis_client = redis.from_url(current_app.config['REDIS_URL'])
+                
+                # 使用 IP 地址作為 key
+                client_id = request.remote_addr
+                key = f"rate_limit:{f.__name__}:{client_id}"
+                
+                current_time = int(time.time())
+                window_start = current_time - per_seconds
+                
+                # 清理過期的請求記錄
+                redis_client.zremrangebyscore(key, 0, window_start)
+                
+                # 取得當前窗口內的請求數
+                current_requests = redis_client.zcard(key)
+                
+                if current_requests >= max_requests:
+                    return jsonify({
+                        'success': False,
+                        'error': 'RATE_LIMIT_EXCEEDED',
+                        'message': '請求過於頻繁，請稍後再試'
+                    }), 429
+                
+                # 記錄當前請求
+                redis_client.zadd(key, {str(current_time): current_time})
+                redis_client.expire(key, per_seconds)
+                
+            except Exception:
+                # 如果 Redis 不可用，不阻擋請求
+                pass
+            
+            return f(*args, **kwargs)
+        
+        return decorated_function
+    return decorator

app/utils/exceptions.py

@@ -0,0 +1,52 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+自定義例外模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+
+class DocumentTranslatorError(Exception):
+    """文件翻譯系統基礎例外"""
+    def __init__(self, message, error_code=None):
+        self.message = message
+        self.error_code = error_code
+        super().__init__(self.message)
+
+
+class AuthenticationError(DocumentTranslatorError):
+    """認證相關例外"""
+    pass
+
+
+class ValidationError(DocumentTranslatorError):
+    """驗證相關例外"""
+    pass
+
+
+class TranslationError(DocumentTranslatorError):
+    """翻譯相關例外"""
+    pass
+
+
+class FileProcessingError(DocumentTranslatorError):
+    """檔案處理相關例外"""
+    pass
+
+
+class APIError(DocumentTranslatorError):
+    """API 相關例外"""
+    pass
+
+
+class ConfigurationError(DocumentTranslatorError):
+    """配置相關例外"""
+    pass
+
+
+class DatabaseError(DocumentTranslatorError):
+    """資料庫相關例外"""
+    pass

app/utils/helpers.py

@@ -0,0 +1,280 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+輔助工具模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import os
+import uuid
+import shutil
+from pathlib import Path
+from datetime import datetime
+from werkzeug.utils import secure_filename
+from flask import current_app
+
+
+def generate_filename(original_filename, job_uuid, file_type='original', language_code=None):
+    """生成安全的檔案名稱"""
+    # 取得檔案副檔名
+    file_ext = Path(original_filename).suffix.lower()
+    
+    # 清理原始檔名
+    clean_name = Path(original_filename).stem
+    clean_name = secure_filename(clean_name)[:50]  # 限制長度
+    
+    if file_type == 'original':
+        return f"original_{clean_name}_{job_uuid[:8]}{file_ext}"
+    elif file_type == 'translated':
+        return f"translated_{clean_name}_{language_code}_{job_uuid[:8]}{file_ext}"
+    else:
+        return f"{file_type}_{clean_name}_{job_uuid[:8]}{file_ext}"
+
+
+def create_job_directory(job_uuid):
+    """建立任務專用目錄"""
+    upload_folder = current_app.config.get('UPLOAD_FOLDER')
+    job_dir = Path(upload_folder) / job_uuid
+    
+    # 建立目錄
+    job_dir.mkdir(parents=True, exist_ok=True)
+    
+    return job_dir
+
+
+def save_uploaded_file(file_obj, job_uuid):
+    """儲存上傳的檔案"""
+    try:
+        # 建立任務目錄
+        job_dir = create_job_directory(job_uuid)
+        
+        # 生成檔案名稱
+        filename = generate_filename(file_obj.filename, job_uuid, 'original')
+        file_path = job_dir / filename
+        
+        # 儲存檔案
+        file_obj.save(str(file_path))
+        
+        # 取得檔案大小
+        file_size = file_path.stat().st_size
+        
+        return {
+            'success': True,
+            'filename': filename,
+            'file_path': str(file_path),
+            'file_size': file_size
+        }
+    
+    except Exception as e:
+        return {
+            'success': False,
+            'error': str(e)
+        }
+
+
+def cleanup_job_directory(job_uuid):
+    """清理任務目錄"""
+    try:
+        upload_folder = current_app.config.get('UPLOAD_FOLDER')
+        job_dir = Path(upload_folder) / job_uuid
+        
+        if job_dir.exists() and job_dir.is_dir():
+            shutil.rmtree(job_dir)
+            return True
+        
+        return False
+    
+    except Exception:
+        return False
+
+
+def format_file_size(size_bytes):
+    """格式化檔案大小"""
+    if size_bytes == 0:
+        return "0 B"
+    
+    size_names = ["B", "KB", "MB", "GB", "TB"]
+    i = 0
+    while size_bytes >= 1024 and i < len(size_names) - 1:
+        size_bytes /= 1024.0
+        i += 1
+    
+    return f"{size_bytes:.1f} {size_names[i]}"
+
+
+def get_file_icon(file_extension):
+    """根據副檔名取得檔案圖示"""
+    icon_map = {
+        '.docx': 'file-word',
+        '.doc': 'file-word',
+        '.pptx': 'file-powerpoint',
+        '.ppt': 'file-powerpoint',
+        '.xlsx': 'file-excel',
+        '.xls': 'file-excel',
+        '.pdf': 'file-pdf'
+    }
+    
+    return icon_map.get(file_extension.lower(), 'file')
+
+
+def calculate_processing_time(start_time, end_time=None):
+    """計算處理時間"""
+    if not start_time:
+        return None
+    
+    if not end_time:
+        end_time = datetime.utcnow()
+    
+    if isinstance(start_time, str):
+        start_time = datetime.fromisoformat(start_time.replace('Z', '+00:00'))
+    
+    if isinstance(end_time, str):
+        end_time = datetime.fromisoformat(end_time.replace('Z', '+00:00'))
+    
+    duration = end_time - start_time
+    
+    # 轉換為秒
+    total_seconds = int(duration.total_seconds())
+    
+    if total_seconds < 60:
+        return f"{total_seconds}秒"
+    elif total_seconds < 3600:
+        minutes = total_seconds // 60
+        seconds = total_seconds % 60
+        return f"{minutes}分{seconds}秒"
+    else:
+        hours = total_seconds // 3600
+        minutes = (total_seconds % 3600) // 60
+        return f"{hours}小時{minutes}分"
+
+
+def generate_download_token(job_uuid, language_code, user_id):
+    """生成下載令牌"""
+    import hashlib
+    import time
+    
+    # 組合資料
+    data = f"{job_uuid}:{language_code}:{user_id}:{int(time.time())}"
+    
+    # 加上應用程式密鑰
+    secret_key = current_app.config.get('SECRET_KEY', 'default_secret')
+    data_with_secret = f"{data}:{secret_key}"
+    
+    # 生成 hash
+    token = hashlib.sha256(data_with_secret.encode()).hexdigest()
+    
+    return token
+
+
+def verify_download_token(token, job_uuid, language_code, user_id, max_age=3600):
+    """驗證下載令牌"""
+    import time
+    
+    try:
+        # 取得當前時間戳
+        current_time = int(time.time())
+        
+        # 在有效時間範圍內嘗試匹配令牌
+        for i in range(max_age):
+            timestamp = current_time - i
+            expected_token = generate_download_token_with_timestamp(
+                job_uuid, language_code, user_id, timestamp
+            )
+            
+            if token == expected_token:
+                return True
+        
+        return False
+    
+    except Exception:
+        return False
+
+
+def generate_download_token_with_timestamp(job_uuid, language_code, user_id, timestamp):
+    """使用指定時間戳生成下載令牌"""
+    import hashlib
+    
+    data = f"{job_uuid}:{language_code}:{user_id}:{timestamp}"
+    secret_key = current_app.config.get('SECRET_KEY', 'default_secret')
+    data_with_secret = f"{data}:{secret_key}"
+    
+    return hashlib.sha256(data_with_secret.encode()).hexdigest()
+
+
+def get_supported_languages():
+    """取得支援的語言列表"""
+    return {
+        'auto': '自動偵測',
+        'zh-CN': '簡體中文',
+        'zh-TW': '繁體中文',
+        'en': '英文',
+        'ja': '日文',
+        'ko': '韓文',
+        'vi': '越南文',
+        'th': '泰文',
+        'id': '印尼文',
+        'ms': '馬來文',
+        'es': '西班牙文',
+        'fr': '法文',
+        'de': '德文',
+        'ru': '俄文'
+    }
+
+
+def parse_json_field(json_str):
+    """安全解析JSON欄位"""
+    import json
+    
+    if not json_str:
+        return None
+    
+    try:
+        if isinstance(json_str, str):
+            return json.loads(json_str)
+        return json_str
+    except (json.JSONDecodeError, TypeError):
+        return None
+
+
+def format_datetime(dt, format_type='full'):
+    """格式化日期時間"""
+    if not dt:
+        return None
+    
+    if isinstance(dt, str):
+        try:
+            dt = datetime.fromisoformat(dt.replace('Z', '+00:00'))
+        except ValueError:
+            return dt
+    
+    if format_type == 'date':
+        return dt.strftime('%Y-%m-%d')
+    elif format_type == 'time':
+        return dt.strftime('%H:%M:%S')
+    elif format_type == 'short':
+        return dt.strftime('%Y-%m-%d %H:%M')
+    else:  # full
+        return dt.strftime('%Y-%m-%d %H:%M:%S')
+
+
+def create_response(success=True, data=None, message=None, error=None, error_code=None):
+    """建立統一的API回應格式"""
+    response = {
+        'success': success
+    }
+    
+    if data is not None:
+        response['data'] = data
+    
+    if message:
+        response['message'] = message
+    
+    if error:
+        response['error'] = error_code or 'ERROR'
+        if not message:
+            response['message'] = error
+    
+    return response

app/utils/ldap_auth.py

@@ -0,0 +1,232 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+LDAP 認證服務
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import time
+from ldap3 import Server, Connection, SUBTREE, ALL_ATTRIBUTES
+from flask import current_app
+from .logger import get_logger
+from .exceptions import AuthenticationError
+
+logger = get_logger(__name__)
+
+
+class LDAPAuthService:
+    """LDAP 認證服務"""
+    
+    def __init__(self):
+        self.config = current_app.config
+        self.server_url = self.config.get('LDAP_SERVER')
+        self.port = self.config.get('LDAP_PORT', 389)
+        self.use_ssl = self.config.get('LDAP_USE_SSL', False)
+        self.bind_user_dn = self.config.get('LDAP_BIND_USER_DN')
+        self.bind_password = self.config.get('LDAP_BIND_USER_PASSWORD')
+        self.search_base = self.config.get('LDAP_SEARCH_BASE')
+        self.login_attr = self.config.get('LDAP_USER_LOGIN_ATTR', 'userPrincipalName')
+    
+    def create_connection(self, retries=3):
+        """建立 LDAP 連線（帶重試機制）"""
+        for attempt in range(retries):
+            try:
+                server = Server(
+                    self.server_url,
+                    port=self.port,
+                    use_ssl=self.use_ssl,
+                    get_info=ALL_ATTRIBUTES
+                )
+                
+                conn = Connection(
+                    server,
+                    user=self.bind_user_dn,
+                    password=self.bind_password,
+                    auto_bind=True,
+                    raise_exceptions=True
+                )
+                
+                logger.info("LDAP connection established successfully")
+                return conn
+                
+            except Exception as e:
+                logger.error(f"LDAP connection attempt {attempt + 1} failed: {str(e)}")
+                if attempt == retries - 1:
+                    raise AuthenticationError(f"LDAP connection failed: {str(e)}")
+                time.sleep(1)
+        
+        return None
+    
+    def authenticate_user(self, username, password):
+        """驗證使用者憑證"""
+        try:
+            conn = self.create_connection()
+            if not conn:
+                raise AuthenticationError("Unable to connect to LDAP server")
+            
+            # 搜尋使用者
+            search_filter = f"(&(objectClass=person)(objectCategory=person)({self.login_attr}={username}))"
+            
+            conn.search(
+                self.search_base,
+                search_filter,
+                SUBTREE,
+                attributes=['displayName', 'mail', 'sAMAccountName', 'userPrincipalName', 'department']
+            )
+            
+            if not conn.entries:
+                logger.warning(f"User not found: {username}")
+                raise AuthenticationError("帳號不存在")
+            
+            user_entry = conn.entries[0]
+            user_dn = user_entry.entry_dn
+            
+            # 驗證使用者密碼
+            try:
+                user_conn = Connection(
+                    conn.server,
+                    user=user_dn,
+                    password=password,
+                    auto_bind=True,
+                    raise_exceptions=True
+                )
+                user_conn.unbind()
+                
+                # 返回使用者資訊
+                user_info = {
+                    'username': str(user_entry.sAMAccountName) if user_entry.sAMAccountName else username,
+                    'display_name': str(user_entry.displayName) if user_entry.displayName else username,
+                    'email': str(user_entry.mail) if user_entry.mail else f"{username}@panjit.com.tw",
+                    'department': str(user_entry.department) if hasattr(user_entry, 'department') and user_entry.department else None,
+                    'user_principal_name': str(user_entry.userPrincipalName) if user_entry.userPrincipalName else username
+                }
+                
+                logger.info(f"User authenticated successfully: {username}")
+                return user_info
+                
+            except Exception as e:
+                logger.warning(f"Authentication failed for user {username}: {str(e)}")
+                raise AuthenticationError("密碼錯誤")
+        
+        except AuthenticationError:
+            raise
+        except Exception as e:
+            logger.error(f"LDAP authentication error: {str(e)}")
+            raise AuthenticationError(f"認證服務錯誤: {str(e)}")
+        
+        finally:
+            if 'conn' in locals() and conn:
+                conn.unbind()
+    
+    def search_users(self, search_term, limit=20):
+        """搜尋使用者"""
+        try:
+            conn = self.create_connection()
+            if not conn:
+                return []
+            
+            # 建構搜尋過濾器
+            search_filter = f"""(&
+                (objectClass=person)
+                (objectCategory=person)
+                (!(userAccountControl:1.2.840.113556.1.4.803:=2))
+                (|
+                    (displayName=*{search_term}*)
+                    (mail=*{search_term}*)
+                    (sAMAccountName=*{search_term}*)
+                    (userPrincipalName=*{search_term}*)
+                )
+            )"""
+            
+            # 移除多餘空白
+            search_filter = ' '.join(search_filter.split())
+            
+            conn.search(
+                self.search_base,
+                search_filter,
+                SUBTREE,
+                attributes=['sAMAccountName', 'displayName', 'mail', 'department'],
+                size_limit=limit
+            )
+            
+            results = []
+            for entry in conn.entries:
+                results.append({
+                    'username': str(entry.sAMAccountName) if entry.sAMAccountName else '',
+                    'display_name': str(entry.displayName) if entry.displayName else '',
+                    'email': str(entry.mail) if entry.mail else '',
+                    'department': str(entry.department) if hasattr(entry, 'department') and entry.department else ''
+                })
+            
+            logger.info(f"LDAP search found {len(results)} results for term: {search_term}")
+            return results
+            
+        except Exception as e:
+            logger.error(f"LDAP search error: {str(e)}")
+            return []
+        finally:
+            if 'conn' in locals() and conn:
+                conn.unbind()
+    
+    def get_user_info(self, username):
+        """取得使用者詳細資訊"""
+        try:
+            conn = self.create_connection()
+            if not conn:
+                return None
+            
+            # 支援 sAMAccountName 和 userPrincipalName 格式
+            if '@' in username:
+                search_filter = f"""(&
+                    (objectClass=person)
+                    (|
+                        (userPrincipalName={username})
+                        (mail={username})
+                    )
+                )"""
+            else:
+                search_filter = f"(&(objectClass=person)(sAMAccountName={username}))"
+            
+            # 移除多餘空白
+            search_filter = ' '.join(search_filter.split())
+            
+            conn.search(
+                self.search_base,
+                search_filter,
+                SUBTREE,
+                attributes=['displayName', 'mail', 'sAMAccountName', 'userPrincipalName', 'department']
+            )
+            
+            if not conn.entries:
+                return None
+            
+            entry = conn.entries[0]
+            return {
+                'username': str(entry.sAMAccountName) if entry.sAMAccountName else username,
+                'display_name': str(entry.displayName) if entry.displayName else username,
+                'email': str(entry.mail) if entry.mail else f"{username}@panjit.com.tw",
+                'department': str(entry.department) if hasattr(entry, 'department') and entry.department else None,
+                'user_principal_name': str(entry.userPrincipalName) if entry.userPrincipalName else ''
+            }
+            
+        except Exception as e:
+            logger.error(f"Error getting user info for {username}: {str(e)}")
+            return None
+        finally:
+            if 'conn' in locals() and conn:
+                conn.unbind()
+    
+    def test_connection(self):
+        """測試 LDAP 連線（健康檢查用）"""
+        try:
+            conn = self.create_connection(retries=1)
+            if conn:
+                conn.unbind()
+                return True
+            return False
+        except Exception as e:
+            logger.error(f"LDAP connection test failed: {str(e)}")
+            return False

app/utils/logger.py

@@ -0,0 +1,126 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+日誌管理模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import logging
+import os
+from pathlib import Path
+from logging.handlers import RotatingFileHandler
+from flask import current_app, has_request_context, request, g
+
+
+def get_logger(name):
+    """取得指定名稱的日誌器"""
+    logger = logging.getLogger(name)
+    
+    # 避免重複設定 handler
+    if not logger.handlers:
+        setup_logger(logger)
+    
+    return logger
+
+
+def setup_logger(logger):
+    """設定日誌器"""
+    if has_request_context() and current_app:
+        log_level = current_app.config.get('LOG_LEVEL', 'INFO')
+        log_file = current_app.config.get('LOG_FILE', 'logs/app.log')
+    else:
+        log_level = os.environ.get('LOG_LEVEL', 'INFO')
+        log_file = os.environ.get('LOG_FILE', 'logs/app.log')
+    
+    # 確保日誌目錄存在
+    log_path = Path(log_file)
+    log_path.parent.mkdir(parents=True, exist_ok=True)
+    
+    # 設定日誌等級
+    logger.setLevel(getattr(logging, log_level.upper()))
+    
+    # 建立格式化器
+    formatter = logging.Formatter(
+        '%(asctime)s [%(levelname)s] %(name)s: %(message)s',
+        datefmt='%Y-%m-%d %H:%M:%S'
+    )
+    
+    # 檔案處理器（使用輪轉）
+    file_handler = RotatingFileHandler(
+        log_file,
+        maxBytes=10*1024*1024,  # 10MB
+        backupCount=5,
+        encoding='utf-8'
+    )
+    file_handler.setLevel(getattr(logging, log_level.upper()))
+    file_handler.setFormatter(formatter)
+    logger.addHandler(file_handler)
+    
+    # 控制台處理器
+    console_handler = logging.StreamHandler()
+    console_handler.setLevel(logging.INFO)
+    console_handler.setFormatter(formatter)
+    logger.addHandler(console_handler)
+
+
+class DatabaseLogHandler(logging.Handler):
+    """資料庫日誌處理器"""
+    
+    def emit(self, record):
+        """發送日誌記錄到資料庫"""
+        try:
+            from app.models.log import SystemLog
+            
+            # 取得使用者和任務資訊（如果有的話）
+            user_id = None
+            job_id = None
+            extra_data = {}
+            
+            if has_request_context():
+                user_id = g.get('current_user_id')
+                extra_data.update({
+                    'method': request.method,
+                    'endpoint': request.endpoint,
+                    'url': request.url,
+                    'ip_address': request.remote_addr,
+                    'user_agent': request.headers.get('User-Agent')
+                })
+            
+            # 儲存到資料庫
+            SystemLog.log(
+                level=record.levelname,
+                module=record.name,
+                message=record.getMessage(),
+                user_id=user_id,
+                job_id=job_id,
+                extra_data=extra_data if extra_data else None
+            )
+            
+        except Exception:
+            # 避免日誌記錄失敗影響主程序
+            pass
+
+
+def init_logging(app):
+    """初始化應用程式日誌"""
+    # 設定根日誌器
+    root_logger = logging.getLogger()
+    root_logger.setLevel(logging.INFO)
+    
+    # 添加資料庫日誌處理器（僅對重要日誌）
+    if app.config.get('SQLALCHEMY_DATABASE_URI'):
+        db_handler = DatabaseLogHandler()
+        db_handler.setLevel(logging.WARNING)  # 只記錄警告以上等級到資料庫
+        root_logger.addHandler(db_handler)
+    
+    # 設定 Flask 應用日誌
+    if not app.logger.handlers:
+        setup_logger(app.logger)
+    
+    # 設定第三方庫日誌等級
+    logging.getLogger('werkzeug').setLevel(logging.WARNING)
+    logging.getLogger('urllib3').setLevel(logging.WARNING)
+    logging.getLogger('requests').setLevel(logging.WARNING)

app/utils/response.py

@@ -0,0 +1,84 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+API 響應處理工具
+
+Author: PANJIT IT Team  
+Created: 2025-09-02
+"""
+
+from datetime import datetime
+from typing import Dict, Any, List, Union
+from app.utils.timezone import to_taiwan_time, format_taiwan_time
+
+
+def convert_datetime_to_taiwan(data: Union[Dict, List, Any]) -> Union[Dict, List, Any]:
+    """遞迴轉換資料中的 datetime 欄位為台灣時間
+    
+    Args:
+        data: 要轉換的資料（字典、列表或其他）
+        
+    Returns:
+        轉換後的資料
+    """
+    if isinstance(data, dict):
+        result = {}
+        for key, value in data.items():
+            if isinstance(value, datetime):
+                # 將 datetime 轉換為台灣時間的 ISO 字符串
+                taiwan_dt = to_taiwan_time(value)
+                result[key] = taiwan_dt.isoformat()
+            elif key in ['created_at', 'updated_at', 'completed_at', 'processing_started_at', 'last_login', 'timestamp']:
+                # 特定的時間欄位
+                if isinstance(value, str):
+                    try:
+                        # 嘗試解析 ISO 格式的時間字符串
+                        dt = datetime.fromisoformat(value.replace('Z', '+00:00'))
+                        taiwan_dt = to_taiwan_time(dt)
+                        result[key] = taiwan_dt.isoformat()
+                    except:
+                        result[key] = value
+                else:
+                    result[key] = convert_datetime_to_taiwan(value)
+            else:
+                result[key] = convert_datetime_to_taiwan(value)
+        return result
+    elif isinstance(data, list):
+        return [convert_datetime_to_taiwan(item) for item in data]
+    else:
+        return data
+
+
+def create_taiwan_response(success: bool = True, data: Any = None, message: str = '', 
+                          error: str = '', **kwargs) -> Dict[str, Any]:
+    """創建包含台灣時區轉換的 API 響應
+    
+    Args:
+        success: 是否成功
+        data: 響應資料
+        message: 成功訊息
+        error: 錯誤訊息
+        **kwargs: 其他參數
+        
+    Returns:
+        包含台灣時區的響應字典
+    """
+    response = {
+        'success': success,
+        'timestamp': format_taiwan_time(datetime.now(), "%Y-%m-%d %H:%M:%S")
+    }
+    
+    if data is not None:
+        response['data'] = convert_datetime_to_taiwan(data)
+    
+    if message:
+        response['message'] = message
+        
+    if error:
+        response['error'] = error
+        
+    # 加入其他參數
+    for key, value in kwargs.items():
+        response[key] = convert_datetime_to_taiwan(value)
+    
+    return response

app/utils/timezone.py

@@ -0,0 +1,104 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+時區工具函數
+
+Author: PANJIT IT Team
+Created: 2025-09-02
+"""
+
+from datetime import datetime, timezone, timedelta
+from typing import Optional
+
+# 台灣時區 UTC+8
+TAIWAN_TZ = timezone(timedelta(hours=8))
+
+
+def now_taiwan() -> datetime:
+    """取得當前台灣時間（UTC+8）"""
+    return datetime.now(TAIWAN_TZ)
+
+
+def now_utc() -> datetime:
+    """取得當前 UTC 時間"""
+    return datetime.now(timezone.utc)
+
+
+def to_taiwan_time(dt: datetime) -> datetime:
+    """將 datetime 轉換為台灣時間
+    
+    Args:
+        dt: datetime 物件（可能是 naive 或 aware）
+        
+    Returns:
+        台灣時區的 datetime 物件
+    """
+    if dt is None:
+        return None
+        
+    # 如果是 naive datetime，假設為 UTC
+    if dt.tzinfo is None:
+        dt = dt.replace(tzinfo=timezone.utc)
+    
+    # 轉換為台灣時區
+    return dt.astimezone(TAIWAN_TZ)
+
+
+def to_utc_time(dt: datetime) -> datetime:
+    """將 datetime 轉換為 UTC 時間
+    
+    Args:
+        dt: datetime 物件（可能是 naive 或 aware）
+        
+    Returns:
+        UTC 時區的 datetime 物件
+    """
+    if dt is None:
+        return None
+        
+    # 如果是 naive datetime，假設為台灣時間
+    if dt.tzinfo is None:
+        dt = dt.replace(tzinfo=TAIWAN_TZ)
+    
+    # 轉換為 UTC
+    return dt.astimezone(timezone.utc)
+
+
+def format_taiwan_time(dt: datetime, format_str: str = "%Y-%m-%d %H:%M:%S") -> str:
+    """格式化台灣時間為字符串
+    
+    Args:
+        dt: datetime 物件
+        format_str: 格式化字符串
+        
+    Returns:
+        格式化後的時間字符串
+    """
+    if dt is None:
+        return ""
+        
+    taiwan_dt = to_taiwan_time(dt)
+    return taiwan_dt.strftime(format_str)
+
+
+def parse_taiwan_time(time_str: str, format_str: str = "%Y-%m-%d %H:%M:%S") -> datetime:
+    """解析台灣時間字符串為 datetime
+    
+    Args:
+        time_str: 時間字符串
+        format_str: 解析格式
+        
+    Returns:
+        台灣時區的 datetime 物件
+    """
+    naive_dt = datetime.strptime(time_str, format_str)
+    return naive_dt.replace(tzinfo=TAIWAN_TZ)
+
+
+# 為了向後兼容，提供替代 datetime.utcnow() 的函數
+def utcnow() -> datetime:
+    """取得當前 UTC 時間（替代 datetime.utcnow()）
+    
+    注意：新代碼建議使用 now_taiwan() 或 now_utc()
+    """
+    return now_utc().replace(tzinfo=None)  # 返回 naive UTC datetime 以保持兼容性

app/utils/validators.py

@@ -0,0 +1,203 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+驗證工具模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+import os
+from pathlib import Path
+from flask import current_app
+from .exceptions import ValidationError
+
+
+def validate_file(file_obj):
+    """驗證上傳的檔案"""
+    if not file_obj:
+        raise ValidationError("未選擇檔案", "NO_FILE")
+    
+    if not file_obj.filename:
+        raise ValidationError("檔案名稱為空", "NO_FILENAME")
+    
+    # 檢查檔案副檔名
+    file_ext = Path(file_obj.filename).suffix.lower()
+    allowed_extensions = current_app.config.get('ALLOWED_EXTENSIONS', {'.docx', '.doc', '.pptx', '.xlsx', '.xls', '.pdf'})
+    
+    if file_ext not in allowed_extensions:
+        raise ValidationError(
+            f"不支援的檔案類型: {file_ext}，支援的格式: {', '.join(allowed_extensions)}", 
+            "INVALID_FILE_TYPE"
+        )
+    
+    # 檢查檔案大小
+    max_size = current_app.config.get('MAX_CONTENT_LENGTH', 26214400)  # 25MB
+    
+    # 取得檔案大小
+    file_obj.seek(0, os.SEEK_END)
+    file_size = file_obj.tell()
+    file_obj.seek(0)
+    
+    if file_size > max_size:
+        raise ValidationError(
+            f"檔案大小超過限制 ({format_file_size(max_size)})", 
+            "FILE_TOO_LARGE"
+        )
+    
+    if file_size == 0:
+        raise ValidationError("檔案為空", "EMPTY_FILE")
+    
+    return {
+        'filename': file_obj.filename,
+        'file_extension': file_ext,
+        'file_size': file_size,
+        'valid': True
+    }
+
+
+def validate_languages(source_language, target_languages):
+    """驗證語言設定"""
+    # 支援的語言列表
+    supported_languages = {
+        'auto': '自動偵測',
+        'zh-CN': '簡體中文',
+        'zh-TW': '繁體中文',
+        'en': '英文',
+        'ja': '日文',
+        'ko': '韓文',
+        'vi': '越南文',
+        'th': '泰文',
+        'id': '印尼文',
+        'ms': '馬來文',
+        'es': '西班牙文',
+        'fr': '法文',
+        'de': '德文',
+        'ru': '俄文'
+    }
+    
+    # 驗證來源語言
+    if source_language and source_language not in supported_languages:
+        raise ValidationError(
+            f"不支援的來源語言: {source_language}", 
+            "INVALID_SOURCE_LANGUAGE"
+        )
+    
+    # 驗證目標語言
+    if not target_languages or not isinstance(target_languages, list):
+        raise ValidationError("必須指定至少一個目標語言", "NO_TARGET_LANGUAGES")
+    
+    if len(target_languages) == 0:
+        raise ValidationError("必須指定至少一個目標語言", "NO_TARGET_LANGUAGES")
+    
+    if len(target_languages) > 10:  # 限制最多10個目標語言
+        raise ValidationError("目標語言數量過多，最多支援10個", "TOO_MANY_TARGET_LANGUAGES")
+    
+    invalid_languages = [lang for lang in target_languages if lang not in supported_languages]
+    if invalid_languages:
+        raise ValidationError(
+            f"不支援的目標語言: {', '.join(invalid_languages)}", 
+            "INVALID_TARGET_LANGUAGE"
+        )
+    
+    # 檢查來源語言和目標語言是否有重疊
+    if source_language and source_language != 'auto' and source_language in target_languages:
+        raise ValidationError(
+            "目標語言不能包含來源語言", 
+            "SOURCE_TARGET_OVERLAP"
+        )
+    
+    return {
+        'source_language': source_language or 'auto',
+        'target_languages': target_languages,
+        'supported_languages': supported_languages,
+        'valid': True
+    }
+
+
+def validate_job_uuid(job_uuid):
+    """驗證任務UUID格式"""
+    import uuid
+    
+    if not job_uuid:
+        raise ValidationError("任務UUID不能為空", "INVALID_UUID")
+    
+    try:
+        uuid.UUID(job_uuid)
+        return True
+    except ValueError:
+        raise ValidationError("任務UUID格式錯誤", "INVALID_UUID")
+
+
+def validate_pagination(page, per_page):
+    """驗證分頁參數"""
+    try:
+        page = int(page) if page else 1
+        per_page = int(per_page) if per_page else 20
+    except (ValueError, TypeError):
+        raise ValidationError("分頁參數必須為數字", "INVALID_PAGINATION")
+    
+    if page < 1:
+        raise ValidationError("頁數必須大於0", "INVALID_PAGE")
+    
+    if per_page < 1 or per_page > 100:
+        raise ValidationError("每頁項目數必須在1-100之間", "INVALID_PER_PAGE")
+    
+    return page, per_page
+
+
+def format_file_size(size_bytes):
+    """格式化檔案大小顯示"""
+    if size_bytes == 0:
+        return "0 B"
+    
+    size_names = ["B", "KB", "MB", "GB", "TB"]
+    i = 0
+    while size_bytes >= 1024 and i < len(size_names) - 1:
+        size_bytes /= 1024.0
+        i += 1
+    
+    return f"{size_bytes:.1f} {size_names[i]}"
+
+
+def sanitize_filename(filename):
+    """清理檔案名稱，移除不安全字元"""
+    import re
+    
+    # 保留檔案名稱和副檔名
+    name = Path(filename).stem
+    ext = Path(filename).suffix
+    
+    # 移除或替換不安全字元
+    safe_name = re.sub(r'[^\w\s.-]', '_', name)
+    safe_name = re.sub(r'\s+', '_', safe_name)  # 空白替換為底線
+    safe_name = safe_name.strip('._')  # 移除開頭結尾的點和底線
+    
+    # 限制長度
+    if len(safe_name) > 100:
+        safe_name = safe_name[:100]
+    
+    return f"{safe_name}{ext}"
+
+
+def validate_date_range(start_date, end_date):
+    """驗證日期範圍"""
+    from datetime import datetime
+    
+    if start_date:
+        try:
+            start_date = datetime.fromisoformat(start_date.replace('Z', '+00:00'))
+        except ValueError:
+            raise ValidationError("開始日期格式錯誤", "INVALID_START_DATE")
+    
+    if end_date:
+        try:
+            end_date = datetime.fromisoformat(end_date.replace('Z', '+00:00'))
+        except ValueError:
+            raise ValidationError("結束日期格式錯誤", "INVALID_END_DATE")
+    
+    if start_date and end_date and start_date > end_date:
+        raise ValidationError("開始日期不能晚於結束日期", "INVALID_DATE_RANGE")
+    
+    return start_date, end_date

app/websocket.py

@@ -0,0 +1,230 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+WebSocket 服務模組
+
+Author: PANJIT IT Team
+Created: 2024-01-28
+Modified: 2024-01-28
+"""
+
+from flask_socketio import SocketIO, emit, join_room, leave_room, disconnect
+from flask_jwt_extended import decode_token, get_jwt
+from flask import request
+from functools import wraps
+import logging
+
+# 初始化 SocketIO
+socketio = SocketIO(
+    cors_allowed_origins="*",
+    async_mode='threading',
+    logger=True,
+    engineio_logger=False
+)
+
+# 存儲用戶連接
+connected_users = {}
+
+logger = logging.getLogger(__name__)
+
+
+def jwt_required_ws(f):
+    """WebSocket JWT 驗證裝飾器"""
+    @wraps(f)
+    def decorated_function(*args, **kwargs):
+        try:
+            # 從查詢參數獲取 token
+            token = request.args.get('token')
+            if not token:
+                disconnect()
+                return False
+            
+            # 解碼 token
+            decoded = decode_token(token)
+            user_id = decoded.get('sub')
+            
+            # 儲存用戶信息
+            request.user_id = user_id
+            
+            return f(*args, **kwargs)
+            
+        except Exception as e:
+            logger.error(f"WebSocket authentication failed: {e}")
+            disconnect()
+            return False
+            
+    return decorated_function
+
+
+@socketio.on('connect')
+def handle_connect(auth):
+    """處理客戶端連接"""
+    try:
+        # 從認證數據獲取 token
+        if auth and 'token' in auth:
+            token = auth['token']
+            decoded = decode_token(token)
+            user_id = decoded.get('sub')
+            
+            # 記錄連接
+            connected_users[request.sid] = {
+                'user_id': user_id,
+                'sid': request.sid
+            }
+            
+            # 加入用戶專屬房間
+            join_room(f"user_{user_id}")
+            
+            logger.info(f"User {user_id} connected with session {request.sid}")
+            
+            # 發送連接成功消息
+            emit('connected', {
+                'message': '連接成功',
+                'user_id': user_id
+            })
+            
+            return True
+        else:
+            logger.warning("Connection attempt without authentication")
+            disconnect()
+            return False
+            
+    except Exception as e:
+        logger.error(f"Connection error: {e}")
+        disconnect()
+        return False
+
+
+@socketio.on('disconnect')
+def handle_disconnect():
+    """處理客戶端斷開連接"""
+    try:
+        if request.sid in connected_users:
+            user_info = connected_users[request.sid]
+            user_id = user_info['user_id']
+            
+            # 離開房間
+            leave_room(f"user_{user_id}")
+            
+            # 移除連接記錄
+            del connected_users[request.sid]
+            
+            logger.info(f"User {user_id} disconnected")
+            
+    except Exception as e:
+        logger.error(f"Disconnect error: {e}")
+
+
+@socketio.on('ping')
+def handle_ping():
+    """處理心跳包"""
+    emit('pong', {'timestamp': request.args.get('timestamp')})
+
+
+@socketio.on('subscribe_job')
+def handle_subscribe_job(data):
+    """訂閱任務更新"""
+    try:
+        job_uuid = data.get('job_uuid')
+        if job_uuid:
+            join_room(f"job_{job_uuid}")
+            logger.info(f"Client {request.sid} subscribed to job {job_uuid}")
+            emit('subscribed', {'job_uuid': job_uuid})
+    except Exception as e:
+        logger.error(f"Subscribe job error: {e}")
+
+
+@socketio.on('unsubscribe_job')
+def handle_unsubscribe_job(data):
+    """取消訂閱任務更新"""
+    try:
+        job_uuid = data.get('job_uuid')
+        if job_uuid:
+            leave_room(f"job_{job_uuid}")
+            logger.info(f"Client {request.sid} unsubscribed from job {job_uuid}")
+            emit('unsubscribed', {'job_uuid': job_uuid})
+    except Exception as e:
+        logger.error(f"Unsubscribe job error: {e}")
+
+
+# 工具函數：發送通知
+def send_notification_to_user(user_id, notification_data):
+    """
+    向特定用戶發送通知
+    
+    Args:
+        user_id: 用戶ID
+        notification_data: 通知數據
+    """
+    try:
+        socketio.emit(
+            'new_notification',
+            notification_data,
+            room=f"user_{user_id}",
+            namespace='/'
+        )
+        logger.info(f"Notification sent to user {user_id}")
+        
+    except Exception as e:
+        logger.error(f"Failed to send notification: {e}")
+
+
+def send_job_update(job_uuid, update_data):
+    """
+    發送任務更新
+    
+    Args:
+        job_uuid: 任務UUID
+        update_data: 更新數據
+    """
+    try:
+        socketio.emit(
+            'job_update',
+            {
+                'job_uuid': job_uuid,
+                **update_data
+            },
+            room=f"job_{job_uuid}",
+            namespace='/'
+        )
+        logger.info(f"Job update sent for {job_uuid}")
+        
+    except Exception as e:
+        logger.error(f"Failed to send job update: {e}")
+
+
+def broadcast_system_message(message, message_type='info'):
+    """
+    廣播系統消息給所有連接的用戶
+    
+    Args:
+        message: 消息內容
+        message_type: 消息類型
+    """
+    try:
+        socketio.emit(
+            'system_message',
+            {
+                'message': message,
+                'type': message_type
+            },
+            namespace='/',
+            broadcast=True
+        )
+        logger.info(f"System message broadcasted: {message}")
+        
+    except Exception as e:
+        logger.error(f"Failed to broadcast system message: {e}")
+
+
+# 初始化函數
+def init_websocket(app):
+    """
+    初始化 WebSocket
+    
+    Args:
+        app: Flask 應用實例
+    """
+    socketio.init_app(app)
+    logger.info("WebSocket initialized")
+    return socketio