commit 0720b1d0ccb6f965d52b3bb7a45fc7b9940aa301
Author: beabigegg <lin4637lin4637@gmail.com>
Date:   Thu Aug 7 09:57:20 2025 +0800

    first_upload

diff --git a/.dockerignore b/.dockerignore
new file mode 100644
index 0000000..4b5bae3
--- /dev/null
+++ b/.dockerignore
@@ -0,0 +1,19 @@
+.git
+.gitignore
+.idea
+.vscode
+__pycache__
+.venv
+venv
+env
+.env
+*.pyc
+*.pyo
+*.pyd
+*.db
+/uploads
+/demucs_separated
+Dockerfile
+docker-compose.yml
+README.md
+啟動方式.txt
diff --git a/.env b/.env
new file mode 100644
index 0000000..9d69b09
--- /dev/null
+++ b/.env
@@ -0,0 +1,10 @@
+# Dify API Configuration
+DIFY_API_KEY="app-VGhuWOymkg3LVw4LfUiy2cey"
+DIFY_API_BASE_URL="https://dify.theaken.com/v1"
+
+# Celery Configuration
+CELERY_BROKER_URL="redis://localhost:6379/0"
+CELERY_RESULT_BACKEND="redis://localhost:6379/0"
+
+# Flask App Configuration
+FLASK_RUN_PORT=12000
diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..4523d44
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,147 @@
+# Byte-compiled / optimized / DLL files
+__pycache__/
+*.py[cod]
+*$py.class
+
+# C extensions
+*.so
+
+# Distribution / packaging
+.Python
+build/
+develop-eggs/
+dist/
+downloads/
+eggs/
+.eggs/
+lib/
+lib64/
+parts/
+sdist/
+var/
+wheels/
+pip-wheel-metadata/
+share/python-wheels/
+*.egg-info/
+.installed.cfg
+*.egg
+MANIFEST
+
+# PyInstaller
+#  Usually these files are written by a python script from a template
+#  before PyInstaller builds the exe, so as to inject date/other infos into it.
+*.manifest
+*.spec
+
+# Installer logs
+pip-log.txt
+pip-delete-this-directory.txt
+
+# Unit test / coverage reports
+htmlcov/
+.tox/
+.nox/
+.coverage
+.coverage.*
+.cache
+nosetests.xml
+coverage.xml
+*.cover
+*.py,cover
+.hypothesis/
+.pytest_cache/
+
+# Translations
+*.mo
+*.pot
+
+# Django stuff:
+*.log
+local_settings.py
+db.sqlite3
+db.sqlite3-journal
+
+# Flask stuff:
+instance/
+.webassets-cache
+
+# Scrapy stuff:
+.scrapy
+
+# Sphinx documentation
+docs/_build/
+
+# PyBuilder
+target/
+
+# Jupyter Notebook
+.ipynb_checkpoints
+
+# IPython
+profile_default/
+ipython_config.py
+
+# pyenv
+.python-version
+
+# pipenv
+#   According to pypa/pipenv#598, it is recommended to include Pipfile.lock in version control.
+#   However, in case of collaboration, if have platform-specific dependencies, it may be better to
+#   ignore it.
+# Pipfile.lock
+
+# PEP 582; used by PDM, PEP 582 compatible installers
+__pypackages__/
+
+# Celery stuff
+celerybeat-schedule
+celerybeat.pid
+
+# SageMath parsed files
+*.sage.py
+
+# Environments
+.venv
+env/
+venv/
+ENV/
+env.bak/
+venv.bak/
+
+# Spyder project settings
+.spyderproject
+.spyproject
+
+# Rope project settings
+.ropeproject
+
+# mkdocs documentation
+/site
+
+# mypy
+.mypy_cache/
+.dmypy.json
+dmypy.json
+
+# Pyre type checker
+.pyre/
+
+# pytype static analyzer
+.pytype/
+
+# Cython debug symbols
+cython_debug/
+
+# Personal
+.idea/
+.vscode/
+*.suo
+*.ntvs*
+*.njsproj
+*.sln
+*.sw?
+
+# Demucs and Uploads
+/demucs_separated/
+/uploads/
+/啟動方式.txt
diff --git a/Dockerfile b/Dockerfile
new file mode 100644
index 0000000..7c29082
--- /dev/null
+++ b/Dockerfile
@@ -0,0 +1,36 @@
+# Use an official Python runtime as a parent image
+FROM python:3.10-slim
+
+# Set the working directory in the container
+WORKDIR /app
+
+# Install system dependencies required by some Python packages
+# ffmpeg is crucial for audio/video processing
+RUN apt-get update && apt-get install -y --no-install-recommends \
+    ffmpeg \
+    build-essential \
+    && rm -rf /var/lib/apt/lists/*
+
+# Copy the requirements file into the container at /app
+COPY requirements.txt .
+
+# Install any needed packages specified in requirements.txt
+# This command will install the GPU version of PyTorch if the base image has CUDA support
+# and the host machine has NVIDIA drivers. Otherwise, it can be adapted for CPU.
+RUN pip install --no-cache-dir -r requirements.txt
+
+# Copy the rest of the application's code into the container
+COPY . .
+
+# Make port 12000 available to the world outside this container
+# This is the port the app will run on, as defined in the .env file
+EXPOSE 12000
+
+# Define environment variable to ensure python outputs everything without buffering
+ENV PYTHONUNBUFFERED 1
+
+# Run app.py when the container launches
+# Use Gunicorn for a production-ready WSGI server
+# The command will be specified in docker-compose.yml to allow for different entrypoints
+# for the web server and celery worker.
+CMD ["gunicorn", "--bind", "0.0.0.0:12000", "app:app"]
diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5a1ee6c
--- /dev/null
+++ b/README.md
@@ -0,0 +1,141 @@
+# AI Meeting Assistant
+
+AI Meeting Assistant 是一個功能強大的 Web 應用程式，旨在簡化和自動化會議後續處理流程。它提供了一系列工具，包括從影片中提取音訊、將音訊轉錄為文字、對逐字稿進行多語言翻譯，以及生成專業的會議結論。
+
+
+## ✨ 功能特色
+
+- **影片轉音訊**: 從常見的影片格式（MP4, MOV, AVI）中快速提取 `.wav` 音訊檔案。
+- **AI 音訊轉文字**: 使用 OpenAI Whisper 模型將音訊轉錄為帶有精確時間戳的逐字稿。
+  - **AI 人聲分離**: 內建 Demucs 模型，可在轉錄前分離人聲，有效處理背景嘈雜的音訊。
+  - **多語言支援**: 支援中文、英文、日文、韓文等多種語言的自動偵測與轉錄。
+- **AI 逐段翻譯**: 整合 Dify AI 平台，提供高品質的逐字稿全文對照翻譯。
+- **AI 會議結論**:
+  - **初版摘要**: 自動生成會議的重點、待辦事項和結論。
+  - **迭代修改**: 可根據您的指示，對已生成的結論進行多次修改和完善。
+- **現代化介面**: 採用 Bootstrap 5 構建，提供清晰、專業且響應式的使用者體驗。
+- **Docker 化部署**: 提供 Docker 和 Docker Compose 設定，實現一鍵啟動所有服務（Web, Celery, Redis），並支援 CPU 和 GPU 環境。
+
+## 🛠️ 環境要求
+
+在本地端執行此專案之前，請確保您已安裝以下軟體：
+
+- **Python**: 3.9 或更高版本。
+- **Redis**: 用於 Celery 的訊息代理和後端。
+- **FFmpeg**: 一個處理多媒體內容的開源工具集。請確保 `ffmpeg` 指令可在您的終端機中直接執行。
+  - **Windows**: 可從 [官網](https://ffmpeg.org/download.html) 下載，並將其 `bin` 目錄加入系統的 `PATH` 環境變數。
+  - **macOS (使用 Homebrew)**: `brew install ffmpeg`
+  - **Linux (Debian/Ubuntu)**: `sudo apt update && sudo apt install ffmpeg`
+
+## 🚀 本地端啟動指南
+
+1.  **克隆專案**
+    ```bash
+    git clone <your-repository-url>
+    cd AI_meeting_assistant
+    ```
+
+2.  **建立並啟用虛擬環境**
+    ```bash
+    python -m venv venv
+    # Windows
+    venv\Scripts\activate
+    # macOS / Linux
+    source venv/bin/activate
+    ```
+
+3.  **安裝 Python 依賴套件**
+    ```bash
+    pip install -r requirements.txt
+    ```
+    *注意：`requirements.txt` 預設安裝 GPU 版本的 PyTorch。如果您的電腦沒有 NVIDIA GPU，請在安裝前將 `requirements.txt` 中的 `torch` 和 `torchaudio` 相關行替換為 CPU 版本：*
+    ```
+    # torch --extra-index-url https://download.pytorch.org/whl/cu118
+    # torchaudio --extra-index-url https://download.pytorch.org/whl/cu118
+    torch
+    torchaudio
+    ```
+
+4.  **設定環境變數**
+    - 將 `.env.example` 檔案複製為 `.env`。
+    - 在 `.env` 檔案中填入您的 Dify API 金鑰。
+    ```
+    DIFY_API_KEY="your_dify_api_key_here"
+    ```
+
+5.  **啟動服務**
+    您需要開啟 **三個獨立的終端機**，並在每個終端機中啟用虛擬環境 (`venv`)：
+
+    - **終端機 1: 啟動 Redis**
+      如果尚未執行，請啟動您的 Redis 伺服器。
+      ```bash
+      redis-server
+      ```
+
+    - **終端機 2: 啟動 Celery Worker**
+      此背景處理器將執行所有耗時的 AI 任務。
+      ```bash
+      celery -A tasks.celery worker --loglevel=info --pool=solo
+      ```
+      *在 Windows 上，可能需要使用 `gevent` 或 `eventlet` 作為執行池：`celery -A tasks.celery worker --loglevel=info -P gevent`*
+
+    - **終端機 3: 啟動 Flask Web 應用**
+      ```bash
+      flask run
+      ```
+      應用程式將在 `.env` 檔案中指定的 Port（預設為 `12000`）上執行。
+
+6.  **訪問應用**
+    在瀏覽器中開啟 `http://127.0.0.1:12000`。
+
+## 🐳 Docker 部署指南
+
+使用 Docker 是部署此應用的推薦方式，因為它能自動處理所有服務和依賴。
+
+1.  **安裝 Docker 和 Docker Compose**
+    請確保您的系統已安裝 [Docker](https://www.docker.com/products/docker-desktop/)。
+
+2.  **設定環境變數**
+    - **重要**: Docker 使用的是容器網路，因此需要將 Redis 的主機名稱指向 Docker Compose 中定義的服務名稱。請確認 `.env` 檔案中的 `CELERY_BROKER_URL` 和 `CELERY_RESULT_BACKEND` 指向 `redis`：
+      ```
+      CELERY_BROKER_URL="redis://redis:6379/0"
+      CELERY_RESULT_BACKEND="redis://redis:6379/0"
+      ```
+
+3.  **建構並啟動容器**
+    在專案根目錄下執行以下指令：
+    ```bash
+    docker-compose up --build
+    ```
+    - **GPU 支援**: 如果您的系統支援 NVIDIA GPU 且已安裝 `nvidia-docker-toolkit`，Docker Compose 將會自動使用 `Dockerfile` 中為 GPU 優化的設定來建構映像。
+    - **CPU 使用者**: 如果您沒有 GPU，Docker 會自動退回使用 CPU 版本的 PyTorch，無需任何修改。
+
+4.  **訪問應用**
+    在瀏覽器中開啟 `http://localhost:12000`。
+
+5.  **停止服務**
+    若要停止所有容器，請在終端機中按下 `Ctrl + C`，然後執行：
+    ```bash
+    docker-compose down
+    ```
+
+## 📂 專案結構
+
+```
+.
+├── app.py                  # Flask 主應用程式
+├── tasks.py                # Celery 背景任務 (AI/ML 處理)
+├── requirements.txt        # Python 依賴套件
+├── Dockerfile              # 用於建構應用程式映像
+├── docker-compose.yml      # 一鍵啟動所有服務
+├── .env.example            # 環境變數範本
+├── .gitignore              # Git 忽略清單
+├── README.md               # 專案說明文件
+├── templates/
+│   └── index.html          # 前端網頁
+├── static/
+│   ├── css/style.css       # 自訂樣式
+│   └── js/script.js        # 前端互動邏輯
+├── uploads/                # (自動生成) 儲存上傳的檔案
+└── demucs_separated/       # (自動生成) 儲存人聲分離結果
+```
diff --git a/app.py b/app.py
new file mode 100644
index 0000000..2ca3f82
--- /dev/null
+++ b/app.py
@@ -0,0 +1,112 @@
+import os
+import uuid
+from flask import Flask, request, jsonify, render_template, send_from_directory, url_for
+from werkzeug.utils import secure_filename
+from dotenv import load_dotenv
+from tasks import (
+    celery, 
+    extract_audio_task,
+    transcribe_audio_task,
+    translate_segments_task,
+    summarize_text_task
+)
+
+# --- Flask App 設定 ---
+load_dotenv()
+app = Flask(__name__)
+
+project_root = os.path.dirname(os.path.abspath(__file__))
+UPLOAD_FOLDER = os.path.join(project_root, 'uploads')
+
+if not os.path.exists(UPLOAD_FOLDER):
+    os.makedirs(UPLOAD_FOLDER)
+app.config['UPLOAD_FOLDER'] = UPLOAD_FOLDER
+app.config['MAX_CONTENT_LENGTH'] = 1024 * 1024 * 1024  # 限制上傳大小為 1GB
+
+def save_uploaded_file(file_key='file'):
+    """一個輔助函式，用於儲存上傳的檔案並回傳路徑。"""
+    if file_key not in request.files:
+        return None, (jsonify({'error': '請求中沒有檔案部分'}), 400)
+    file = request.files[file_key]
+    if file.filename == '':
+        return None, (jsonify({'error': '未選擇檔案'}), 400)
+    if file:
+        original_filename = secure_filename(file.filename)
+        file_extension = os.path.splitext(original_filename)[1]
+        unique_filename = f"{uuid.uuid4()}{file_extension}"
+        file_path = os.path.join(app.config['UPLOAD_FOLDER'], unique_filename)
+        file.save(file_path)
+        return file_path, None
+    return None, (jsonify({'error': '未知的檔案錯誤'}), 500)
+
+# --- API 路由 (Endpoints) ---
+@app.route('/')
+def index():
+    return render_template('index.html')
+
+@app.route('/extract_audio', methods=['POST'])
+def handle_extract_audio():
+    input_path, error = save_uploaded_file()
+    if error: return error
+    
+    output_audio_path = os.path.splitext(input_path)[0] + ".wav"
+    task = extract_audio_task.delay(input_path, output_audio_path)
+    return jsonify({'task_id': task.id, 'status_url': url_for('get_task_status', task_id=task.id)}), 202
+
+@app.route('/transcribe_audio', methods=['POST'])
+def handle_transcribe_audio():
+    input_path, error = save_uploaded_file()
+    if error: return error
+    
+    language = request.form.get('language', 'auto')
+    use_demucs = request.form.get('use_demucs') == 'on'
+    
+    output_txt_path = os.path.splitext(input_path)[0] + ".txt"
+    
+    task = transcribe_audio_task.delay(input_path, output_txt_path, language, use_demucs)
+    
+    return jsonify({'task_id': task.id, 'status_url': url_for('get_task_status', task_id=task.id)}), 202
+
+@app.route('/translate_text', methods=['POST'])
+def handle_translate_text():
+    input_path, error = save_uploaded_file()
+    if error: return error
+        
+    target_language = request.form.get('target_language', '繁體中文')
+    output_txt_path = os.path.splitext(input_path)[0] + "_translated.txt"
+    task = translate_segments_task.delay(input_path, output_txt_path, target_language)
+    return jsonify({'task_id': task.id, 'status_url': url_for('get_task_status', task_id=task.id)}), 202
+    
+@app.route('/summarize_text', methods=['POST'])
+def handle_summarize_text():
+    data = request.get_json()
+    if not data or 'text_content' not in data:
+        return jsonify({'error': '請求中缺少 text_content'}), 400
+        
+    text_content = data['text_content']
+    target_language = data.get('target_language', '繁體中文')
+    conversation_id = data.get('conversation_id')
+    revision_instruction = data.get('revision_instruction')
+
+    task = summarize_text_task.delay(text_content, target_language, conversation_id, revision_instruction)
+    return jsonify({'task_id': task.id, 'status_url': url_for('get_task_status', task_id=task.id)}), 202
+
+# --- 通用狀態查詢和下載 ---
+@app.route('/status/<task_id>')
+def get_task_status(task_id):
+    task = celery.AsyncResult(task_id)
+    response_data = {'state': task.state, 'info': task.info if isinstance(task.info, dict) else str(task.info)}
+    
+    if task.state == 'SUCCESS' and isinstance(task.info, dict) and 'result_path' in task.info and task.info['result_path']:
+        response_data['info']['download_url'] = url_for('download_file', filename=os.path.basename(task.info['result_path']))
+        
+    return jsonify(response_data)
+
+@app.route('/download/<filename>')
+def download_file(filename):
+    return send_from_directory(app.config['UPLOAD_FOLDER'], filename, as_attachment=True)
+
+# --- 主程式入口 ---
+if __name__ == '__main__':
+    port = int(os.environ.get("FLASK_RUN_PORT", 5000))
+    app.run(host='0.0.0.0', port=port, debug=True)
diff --git a/docker-compose.yml b/docker-compose.yml
new file mode 100644
index 0000000..49cdcd8
--- /dev/null
+++ b/docker-compose.yml
@@ -0,0 +1,55 @@
+version: '3.8'
+
+services:
+  redis:
+    image: "redis:alpine"
+    ports:
+      - "6379:6379"
+    volumes:
+      - redis_data:/data
+
+  web:
+    build: .
+    ports:
+      - "12000:12000"
+    volumes:
+      - .:/app
+      - ./uploads:/app/uploads
+    env_file:
+      - .env
+    depends_on:
+      - redis
+    # The following 'deploy' key enables GPU access for the service.
+    # This requires nvidia-container-toolkit to be installed on the host.
+    # Docker Compose will automatically use this if available.
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: all
+              capabilities: [gpu]
+    command: gunicorn --bind 0.0.0.0:12000 --workers 4 app:app
+
+  worker:
+    build: .
+    volumes:
+      - .:/app
+      - ./uploads:/app/uploads
+      - ./demucs_separated:/app/demucs_separated
+    env_file:
+      - .env
+    depends_on:
+      - redis
+    deploy:
+      resources:
+        reservations:
+          devices:
+            - driver: nvidia
+              count: all
+              capabilities: [gpu]
+    # For Windows, you might need to use -P gevent
+    command: celery -A tasks.celery worker --loglevel=info --pool=solo
+
+volumes:
+  redis_data:
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000..1f10ae8
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,18 @@
+Flask==2.2.5
+celery==5.3.6
+redis==4.5.4
+# For NVIDIA GPU (CUDA 11.8) support, use these lines:
+torch --extra-index-url https://download.pytorch.org/whl/cu118
+torchaudio --extra-index-url https://download.pytorch.org/whl/cu118
+# For CPU-only, comment out the two lines above and uncomment the two lines below:
+# torch
+# torchaudio
+openai-whisper
+moviepy
+opencc-python-reimplemented
+ffmpeg-python
+python-dotenv
+gunicorn
+demucs
+soundfile
+gevent # Added for celery on windows
diff --git a/static/css/style.css b/static/css/style.css
new file mode 100644
index 0000000..9971d18
--- /dev/null
+++ b/static/css/style.css
@@ -0,0 +1,38 @@
+/* static/css/style.css */
+body {
+    background-color: #f8f9fa;
+}
+
+.container {
+    max-width: 960px;
+}
+
+.card-header-tabs {
+    margin-bottom: -1px;
+}
+
+.nav-link {
+    color: #6c757d;
+}
+
+.nav-link.active {
+    color: #000;
+    background-color: #fff;
+    border-color: #dee2e6 #dee2e6 #fff;
+}
+
+.result-preview {
+    white-space: pre-wrap;
+    word-wrap: break-word;
+    max-height: 400px;
+    overflow-y: auto;
+    font-family: 'Courier New', Courier, monospace;
+}
+
+.action-btn:disabled {
+    cursor: not-allowed;
+}
+
+.progress-bar {
+    transition: width 0.6s ease;
+}
diff --git a/static/js/script.js b/static/js/script.js
new file mode 100644
index 0000000..b00f9b0
--- /dev/null
+++ b/static/js/script.js
@@ -0,0 +1,275 @@
+document.addEventListener('DOMContentLoaded', function() {
+    // --- Global variables ---
+    let statusInterval;
+    let currentTaskType = '';
+    let summaryConversationId = null;
+    let lastSummaryText = '';
+
+    // --- DOM Elements ---
+    const progressContainer = document.getElementById('progress-container');
+    const statusText = document.getElementById('status-text');
+    const progressBar = document.getElementById('progress-bar');
+    const resultContainer = document.getElementById('result-container');
+    const textResultPreview = document.getElementById('text-result-preview');
+    const downloadLink = document.getElementById('download-link');
+    const revisionArea = document.getElementById('revision-area');
+    const allActionButtons = document.querySelectorAll('.action-btn');
+
+    // --- Tab Switching Logic ---
+    const tabButtons = document.querySelectorAll('#myTab button');
+    tabButtons.forEach(button => {
+        button.addEventListener('shown.bs.tab', function() {
+            resetUiForNewTask();
+        });
+    });
+
+    // --- Event Listeners for all action buttons ---
+    allActionButtons.forEach(button => {
+        button.addEventListener('click', handleActionClick);
+    });
+
+    function handleActionClick(event) {
+        const button = event.currentTarget;
+        currentTaskType = button.dataset.task;
+
+        resetUiForNewTask();
+        button.disabled = true;
+        button.innerHTML = '<span class="spinner-border spinner-border-sm" role="status" aria-hidden="true"></span> 處理中...';
+        progressContainer.style.display = 'block';
+
+        if (currentTaskType === 'summarize_text') {
+            const fileInput = document.getElementById('summary-file-input');
+            const file = fileInput.files[0];
+
+            if (file) {
+                const reader = new FileReader();
+                reader.onload = function(e) {
+                    const fileContent = e.target.result;
+                    startSummarizeTask(fileContent);
+                };
+                reader.onerror = function() {
+                    handleError("讀取檔案時發生錯誤。");
+                };
+                reader.readAsText(file);
+            } else {
+                const textContent = document.getElementById('summary-source-text').value;
+                if (!textContent.trim()) {
+                    alert('請貼上文字或選擇檔案！');
+                    resetButtons();
+                    return;
+                }
+                startSummarizeTask(textContent);
+            }
+            return;
+        }
+
+        let endpoint = '';
+        let formData = new FormData();
+        let body = null;
+        let fileInput;
+
+        switch (currentTaskType) {
+            case 'extract_audio':
+                endpoint = '/extract_audio';
+                fileInput = document.getElementById('video-file');
+                break;
+
+            case 'transcribe_audio':
+                endpoint = '/transcribe_audio';
+                fileInput = document.getElementById('audio-file');
+                formData.append('language', document.getElementById('lang-select').value);
+                if (document.getElementById('use-demucs').checked) {
+                    formData.append('use_demucs', 'on');
+                }
+                break;
+
+            case 'translate_text':
+                endpoint = '/translate_text';
+                fileInput = document.getElementById('transcript-file');
+                formData.append('target_language', document.getElementById('translate-lang-select').value);
+                break;
+
+            case 'revise_summary':
+                endpoint = '/summarize_text';
+                const instruction = document.getElementById('revision-instruction').value;
+                if (!lastSummaryText) { alert('請先生成初版結論！'); resetButtons(); return; }
+                if (!instruction.trim()) { alert('請輸入修改指示！'); resetButtons(); return; }
+                body = JSON.stringify({
+                    text_content: lastSummaryText,
+                    revision_instruction: instruction,
+                    target_language: document.getElementById('summary-lang-select').value,
+                    conversation_id: summaryConversationId
+                });
+                startFetchTask(endpoint, body, { 'Content-Type': 'application/json' });
+                return;
+
+            default:
+                console.error('Unknown task type:', currentTaskType);
+                resetButtons();
+                return;
+        }
+
+        if (!fileInput || !fileInput.files[0]) {
+            alert('請選擇一個檔案！');
+            resetButtons();
+            return;
+        }
+        formData.append('file', fileInput.files[0]);
+        body = formData;
+
+        startFetchTask(endpoint, body);
+    }
+
+    function startSummarizeTask(textContent) {
+        summaryConversationId = null;
+        lastSummaryText = textContent;
+        const body = JSON.stringify({
+            text_content: textContent,
+            target_language: document.getElementById('summary-lang-select').value
+        });
+        startFetchTask('/summarize_text', body, { 'Content-Type': 'application/json' });
+    }
+
+    function startFetchTask(endpoint, body, headers = {}) {
+        updateProgress(0, '準備上傳與處理...');
+        fetch(endpoint, {
+            method: 'POST',
+            body: body,
+            headers: headers
+        })
+        .then(response => {
+            if (!response.ok) {
+                return response.json().then(err => { throw new Error(err.error || '伺服器錯誤') });
+            }
+            return response.json();
+        })
+        .then(data => {
+            if (data.task_id) {
+                statusInterval = setInterval(() => checkTaskStatus(data.status_url), 2000);
+            } else {
+                handleError(data.error || '未能啟動背景任務');
+            }
+        })
+        .catch(error => {
+            handleError(error.message || '請求失敗');
+        });
+    }
+
+    function checkTaskStatus(statusUrl) {
+        fetch(statusUrl)
+        .then(response => response.json())
+        .then(data => {
+            const info = data.info || {};
+            if (data.state === 'PROGRESS') {
+                updateProgress(info.current, info.status, info.total);
+                const previewContent = info.content || info.summary || info.preview;
+                if (previewContent) {
+                    resultContainer.style.display = 'block';
+                    textResultPreview.textContent = previewContent;
+                    textResultPreview.style.display = 'block';
+                }
+            } else if (data.state === 'SUCCESS') {
+                clearInterval(statusInterval);
+                updateProgress(100, info.status || '完成！', 100);
+                displayResult(info);
+                resetButtons();
+            } else if (data.state === 'FAILURE') {
+                clearInterval(statusInterval);
+                handleError(info.exc_message || '任務執行失敗');
+            }
+        })
+        .catch(error => {
+            clearInterval(statusInterval);
+            handleError('查詢進度時發生網路錯誤: ' + error);
+        });
+    }
+
+    function updateProgress(current, text, total = 100) {
+        const percent = total > 0 ? Math.round((current / total) * 100) : 0;
+        progressBar.style.width = percent + '%';
+        progressBar.setAttribute('aria-valuenow', percent);
+        progressBar.textContent = percent + '%';
+        statusText.textContent = text;
+    }
+
+    function displayResult(info) {
+        resultContainer.style.display = 'block';
+        
+        const content = info.content || info.summary;
+        if (content) {
+            textResultPreview.textContent = content;
+            textResultPreview.style.display = 'block';
+            lastSummaryText = content;
+        } else {
+            textResultPreview.style.display = 'none';
+        }
+
+        if (info.download_url) {
+            downloadLink.href = info.download_url;
+            downloadLink.style.display = 'inline-block';
+        }
+
+        if (currentTaskType === 'summarize_text' || currentTaskType === 'revise_summary') {
+            revisionArea.style.display = 'block';
+            summaryConversationId = info.conversation_id;
+        }
+    }
+
+    function handleError(message) {
+        statusText.textContent = `錯誤：${message}`;
+        progressBar.classList.add('bg-danger');
+        resetButtons();
+    }
+
+    function resetUiForNewTask() {
+        if (statusInterval) clearInterval(statusInterval);
+
+        progressContainer.style.display = 'none';
+        resultContainer.style.display = 'none';
+        textResultPreview.style.display = 'none';
+        textResultPreview.textContent = '';
+        downloadLink.style.display = 'none';
+        revisionArea.style.display = 'none';
+
+        progressBar.style.width = '0%';
+        progressBar.setAttribute('aria-valuenow', 0);
+        progressBar.textContent = '0%';
+        progressBar.classList.remove('bg-danger');
+        statusText.textContent = '';
+
+        resetButtons();
+    }
+
+    function resetButtons() {
+        allActionButtons.forEach(button => {
+            button.disabled = false;
+            const task = button.dataset.task;
+            let iconHtml = '';
+            let text = '';
+
+            switch(task) {
+                case 'extract_audio':
+                    iconHtml = '<i class="bi bi-arrow-repeat me-2"></i>';
+                    text = '開始轉換';
+                    break;
+                case 'transcribe_audio':
+                    iconHtml = '<i class="bi bi-mic-fill me-2"></i>';
+                    text = '開始轉錄';
+                    break;
+                case 'translate_text':
+                    iconHtml = '<i class="bi bi-translate me-2"></i>';
+                    text = '開始翻譯';
+                    break;
+                case 'summarize_text':
+                    iconHtml = '<i class="bi bi-card-text me-2"></i>';
+                    text = '產生初版結論';
+                    break;
+                case 'revise_summary':
+                    iconHtml = '<i class="bi bi-pencil-square me-2"></i>';
+                    text = '根據指示產生修改版';
+                    break;
+            }
+            button.innerHTML = iconHtml + text;
+        });
+    }
+});
diff --git a/tasks.py b/tasks.py
new file mode 100644
index 0000000..69a6c6b
--- /dev/null
+++ b/tasks.py
@@ -0,0 +1,248 @@
+import os
+import sys
+import whisper
+import torch
+import shutil
+import subprocess
+import time
+import re
+import json
+import requests
+from celery import Celery, Task
+from opencc import OpenCC
+from moviepy import VideoFileClip
+from dotenv import load_dotenv
+
+# Load environment variables from .env file
+load_dotenv()
+
+# ========== Dify API Configuration ==========
+DIFY_API_KEY = os.environ.get("DIFY_API_KEY")
+DIFY_API_BASE_URL = os.environ.get("DIFY_API_BASE_URL")
+
+# ========== Dify API Client Function ==========
+def ask_dify(prompt: str, user_id: str = "default-tk-user-resume", inputs: dict = None, response_mode: str = "streaming", conversation_id: str = None, timeout_seconds: int = 1200) -> dict:
+    if not DIFY_API_KEY or not DIFY_API_BASE_URL:
+        return {"answer": "❌ 錯誤：DIFY_API_KEY 或 DIFY_API_BASE_URL 未在環境變數中設定。", "conversation_id": conversation_id}
+    
+    if inputs is None:
+        inputs = {}
+    url = f"{DIFY_API_BASE_URL}/chat-messages"
+    headers = {"Authorization": f"Bearer {DIFY_API_KEY}", "Content-Type": "application/json"}
+    payload = {"inputs": inputs, "query": prompt, "user": user_id, "response_mode": response_mode}
+    if conversation_id:
+        payload["conversation_id"] = conversation_id
+    returned_conversation_id = conversation_id
+    error_from_stream_message = None
+    print(f"\n--- [ASK_DIFY] Sending request to Dify ---")
+    try:
+        is_streaming_request = (response_mode == "streaming")
+        response = requests.post(url, headers=headers, json=payload, timeout=timeout_seconds, stream=is_streaming_request)
+        response.raise_for_status()
+        if is_streaming_request:
+            full_answer_chunks = []
+            for line in response.iter_lines():
+                if line:
+                    decoded_line = line.decode('utf-8')
+                    if decoded_line.startswith("data:"):
+                        try:
+                            data_json_str = decoded_line[len("data:"):]
+                            data_obj = json.loads(data_json_str)
+                            event_type = data_obj.get("event")
+                            if event_type == "agent_message" or event_type == "message":
+                                if "answer" in data_obj and data_obj["answer"] is not None:
+                                    full_answer_chunks.append(data_obj["answer"])
+                            elif event_type == "message_end":
+                                if "conversation_id" in data_obj:
+                                    returned_conversation_id = data_obj["conversation_id"]
+                                break
+                            elif event_type == "error":
+                                error_from_stream_message = data_obj.get('message', 'Dify API 返回未知的流式錯誤')
+                                returned_conversation_id = data_obj.get("conversation_id", returned_conversation_id)
+                                break
+                        except json.JSONDecodeError:
+                            pass
+            if error_from_stream_message:
+                clean_error_answer = re.sub(r"<think>.*?</think>\s*", "", error_from_stream_message, flags=re.DOTALL).strip()
+                return {"answer": f"❌ Dify API 流處理錯誤: {clean_error_answer}", "conversation_id": returned_conversation_id}
+            raw_answer = "".join(full_answer_chunks) if full_answer_chunks else "⚠️ 流式響應未包含有效回答或內容為空"
+        else:
+            response_data = response.json()
+            raw_answer = response_data.get("answer", "⚠️ 回應中未找到 'answer' 欄位或內容為空")
+            returned_conversation_id = response_data.get("conversation_id", returned_conversation_id)
+        clean_answer = re.sub(r"<think>.*?</think>\s*", "", raw_answer, flags=re.DOTALL).strip()
+        return {"answer": clean_answer, "conversation_id": returned_conversation_id}
+    except requests.exceptions.Timeout:
+        return {"answer": f"⚠️ 請求 Dify API 逾時 (超過 {timeout_seconds} 秒)", "conversation_id": conversation_id}
+    except requests.exceptions.HTTPError as http_err:
+        error_message_detail = f" - 原始響應: {http_err.response.text}"
+        final_error_message = f"❌ Dify API HTTP 錯誤: {http_err.response.status_code}{error_message_detail}"
+        return {"answer": final_error_message, "conversation_id": conversation_id}
+    except Exception as e:
+        return {"answer": f"❌ 處理 Dify API 請求或響應時發生未預期錯誤: {type(e).__name__}: {str(e)}", "conversation_id": conversation_id}
+# ========== Dify API Client Function END ==========
+
+
+# ========== Celery 設定 ==========
+celery = Celery(
+    'tasks',
+    broker=os.environ.get('CELERY_BROKER_URL', 'redis://localhost:6379/0'),
+    backend=os.environ.get('CELERY_RESULT_BACKEND', 'redis://localhost:6379/0')
+)
+
+class ProgressTask(Task):
+    def update_progress(self, current, total, status, extra_info=None):
+        meta = {'current': current, 'total': total, 'status': status}
+        if extra_info:
+            meta.update(extra_info)
+        self.update_state(state='PROGRESS', meta=meta)
+
+# ========== Demucs 輔助函式 ==========
+def separate_vocals_with_demucs(self, audio_path, project_root):
+    self.update_progress(10, 100, "🎛️ 使用 Demucs 分離人聲...")
+    output_dir = os.path.join(project_root, 'demucs_separated')
+    cmd = [
+        sys.executable, '-m', 'demucs.separate', # <-- 將 'python' 改為 sys.executable
+        '-n', 'htdemucs_ft',
+        '--two-stems=vocals',
+        '-o', output_dir,
+        audio_path
+    ]
+    try:
+        result = subprocess.run(cmd, check=True, capture_output=True)
+        print("Demucs stdout:", result.stdout)
+    except subprocess.CalledProcessError as e:
+        stderr_str = "No stderr output"
+        if e.stderr:
+            try:
+                stderr_str = e.stderr.decode('utf-8')
+            except UnicodeDecodeError:
+                stderr_str = e.stderr.decode(sys.getdefaultencoding(), errors='replace')
+        print("Demucs stderr:", stderr_str)
+        raise RuntimeError(f"Demucs 人聲分離失敗: {stderr_str}")
+    original_filename_base = os.path.splitext(os.path.basename(audio_path))[0]
+    vocals_path = os.path.join(output_dir, 'htdemucs_ft', original_filename_base, 'vocals.wav')
+    if not os.path.exists(vocals_path):
+        raise FileNotFoundError(f"找不到 Demucs 分離出的人聲音訊檔案: {vocals_path}")
+    return vocals_path
+
+# ========== Task 1: 影片轉音訊 ==========
+@celery.task(base=ProgressTask, bind=True)
+def extract_audio_task(self, input_video_path, output_audio_path):
+    try:
+        self.update_progress(0, 100, "準備轉換影片...")
+        video_clip = VideoFileClip(input_video_path)
+        self.update_progress(50, 100, "正在提取音訊...")
+        video_clip.audio.write_audiofile(output_audio_path, codec="pcm_s16le")
+        video_clip.close()
+        self.update_progress(100, 100, "音訊提取完成！")
+        return {'status': '完成', 'result_path': output_audio_path}
+    except Exception as e:
+        self.update_state(state='FAILURE', meta={'exc_type': type(e).__name__, 'exc_message': str(e)})
+        return {'status': '錯誤', 'error': str(e)}
+
+# ========== Task 2: 音訊轉文字 (Whisper) ==========
+@celery.task(base=ProgressTask, bind=True)
+def transcribe_audio_task(self, input_audio_path, output_txt_path, language, use_demucs=False):
+    try:
+        self.update_progress(0, 100, "準備開始轉錄...")
+        current_audio_path = input_audio_path
+        if use_demucs:
+            project_root = os.path.dirname(os.path.dirname(output_txt_path)) # uploads folder is inside project_root
+            current_audio_path = separate_vocals_with_demucs(self, input_audio_path, project_root)
+            self.update_progress(25, 100, "✅ 人聲分離完成，準備載入 Whisper...")
+        
+        device = "cuda" if torch.cuda.is_available() else "cpu"
+        progress_after_load = 40 if use_demucs else 20
+        self.update_progress(progress_after_load - 10, 100, f"載入 Whisper 'medium' 模型 (使用 {device})...")
+        model = whisper.load_model("medium", device=device)
+        self.update_progress(progress_after_load, 100, "模型載入完畢，開始轉錄音訊...")
+        transcription_result = model.transcribe(
+            audio=current_audio_path,
+            language=language if language != 'auto' else None,
+            fp16=(device == "cuda"),
+            verbose=False
+        )
+        self.update_progress(85, 100, "轉錄完成，進行繁體轉換與格式化...")
+        cc = OpenCC('s2twp')
+        with open(output_txt_path, "w", encoding="utf-8") as f_out:
+            for segment in transcription_result["segments"]:
+                start_time_s = int(segment["start"])
+                end_time_s = int(segment["end"])
+                text_content = cc.convert(segment["text"].strip())
+                formatted_line = f"[{start_time_s:04d}s - {end_time_s:04d}s] {text_content}\n"
+                f_out.write(formatted_line)
+        self.update_progress(100, 100, "逐字稿完成！")
+        return {'status': '完成', 'result_path': output_txt_path}
+    except Exception as e:
+        import traceback
+        traceback.print_exc()
+        self.update_state(state='FAILURE', meta={'exc_type': type(e).__name__, 'exc_message': str(e)})
+        return {'status': '錯誤', 'error': str(e)}
+
+# ========== Task 3: 逐段翻譯 (Dify) ==========
+glossary = {"LLM": "大型語言模型", "prompt": "提示詞", "API": "應用程式介面"}
+def generate_translation_prompt_for_dify(english_text_segment, target_language):
+    glossary_entries = "\n".join([f"- {k}: {v}" for k, v in glossary.items()])
+    return (
+        f"動作: 翻譯\n目標語言: {target_language}\n參考字典:\n{glossary_entries}\n\n"
+        f"需翻譯內容or需總結內容:\n---\n{english_text_segment}\n---\n你的結果:\n"
+    )
+def split_segments(text_content):
+    pattern = re.compile(r"(\[\d{4}s\s*-\s*\d{4}s\])(.*?)(?=\n\[\d{4}s|$)", re.DOTALL)
+    return [f"{match.group(1).strip()} {match.group(2).strip()}" for match in pattern.finditer(text_content)]
+def parse_segment(segment_text):
+    match = re.match(r"(\[\d{4}s\s*-\s*\d{4}s\])\s*(.*)", segment_text.strip(), re.DOTALL)
+    return (match.group(1), match.group(2)) if match else (None, segment_text.strip())
+
+@celery.task(base=ProgressTask, bind=True)
+def translate_segments_task(self, input_txt_path, output_txt_path, target_language):
+    try:
+        with open(input_txt_path, "r", encoding="utf-8") as f:
+            segments = split_segments(f.read())
+        total_segments = len(segments)
+        if total_segments == 0:
+            self.update_progress(100, 100, "完成，但輸入檔無內容。")
+            return {'status': '完成', 'result_path': None, 'content': '(輸入檔案為空)'}
+        conversation_id = None
+        full_translated_content = ""
+        for idx, segment_text in enumerate(segments):
+            timestamp, original_text = parse_segment(segment_text)
+            status_msg = f"正在翻譯第 {idx + 1}/{total_segments} 段..."
+            self.update_progress(idx, total_segments, status_msg, {'preview': full_translated_content})
+            if not original_text.strip():
+                translated_text = "(原始內容為空)"
+            else:
+                prompt = generate_translation_prompt_for_dify(original_text, target_language)
+                response = ask_dify(prompt, conversation_id=conversation_id)
+                translated_text = response.get("answer", "翻譯失敗")
+                conversation_id = response.get("conversation_id")
+            line_break = "\n\n" if full_translated_content else ""
+            segment_result = f"{timestamp}\n{original_text}\n👉{translated_text}"
+            full_translated_content += f"{line_break}{segment_result}"
+        with open(output_txt_path, "w", encoding="utf-8") as f:
+            f.write(full_translated_content)
+        self.update_progress(total_segments, total_segments, "全部翻譯完成！")
+        return {'status': '完成', 'result_path': output_txt_path, 'content': full_translated_content}
+    except Exception as e:
+        self.update_state(state='FAILURE', meta={'exc_type': type(e).__name__, 'exc_message': str(e)})
+        return {'status': '錯誤', 'error': str(e)}
+
+# ========== Task 4: 會議結論整理 (Dify) ==========
+@celery.task(base=ProgressTask, bind=True)
+def summarize_text_task(self, text_content, target_language, conversation_id=None, revision_instruction=None):
+    try:
+        self.update_progress(1, 100, "準備提示詞...")
+        if revision_instruction:
+            prompt = f"Existing Summary:\n---\n{text_content}\n---\n\nUser's Revision Instructions:\n---\n{revision_instruction}\n---\nPlease provide the revised meeting summary in {target_language}:"
+        else:
+            prompt = f"Please act as a professional meeting analyst and summarize the following meeting transcript into key points, action items, and conclusions. The summary should be in {target_language}.\n\nTranscript:\n---\n{text_content}\n---"
+        self.update_progress(20, 100, "正在請求 Dify API...")
+        response = ask_dify(prompt, conversation_id=conversation_id)
+        summary = response.get("answer", "總結失敗")
+        new_conv_id = response.get("conversation_id")
+        self.update_progress(100, 100, "總結已生成！")
+        return {'status': '完成', 'summary': summary, 'conversation_id': new_conv_id}
+    except Exception as e:
+        self.update_state(state='FAILURE', meta={'exc_type': type(e).__name__, 'exc_message': str(e)})
+        return {'status': '錯誤', 'error': str(e)}
diff --git a/templates/index.html b/templates/index.html
new file mode 100644
index 0000000..b37dd5d
--- /dev/null
+++ b/templates/index.html
@@ -0,0 +1,168 @@
+<!DOCTYPE html>
+<html lang="zh-TW">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>AI Meeting Assistant</title>
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet">
+    <link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/bootstrap-icons@1.11.3/font/bootstrap-icons.min.css">
+    <link rel="stylesheet" href="{{ url_for('static', filename='css/style.css') }}">
+</head>
+<body>
+    <div class="container mt-4 mb-4">
+        <header class="text-center mb-4">
+            <h1 class="display-5"><i class="bi bi-robot me-2"></i>AI 會議助手</h1>
+            <p class="lead text-muted">一個強大的工具，用於轉錄、翻譯和總結您的會議內容。</p>
+        </header>
+
+        <div class="card shadow-sm">
+            <div class="card-header">
+                <ul class="nav nav-tabs card-header-tabs" id="myTab" role="tablist">
+                    <li class="nav-item" role="presentation">
+                        <button class="nav-link active" id="tab1-tab" data-bs-toggle="tab" data-bs-target="#tab1" type="button" role="tab" aria-controls="tab1" aria-selected="true"><i class="bi bi-film me-1"></i> 1. 影片轉音訊</button>
+                    </li>
+                    <li class="nav-item" role="presentation">
+                        <button class="nav-link" id="tab2-tab" data-bs-toggle="tab" data-bs-target="#tab2" type="button" role="tab" aria-controls="tab2" aria-selected="false"><i class="bi bi-mic-fill me-1"></i> 2. 音訊轉文字</button>
+                    </li>
+                    <li class="nav-item" role="presentation">
+                        <button class="nav-link" id="tab3-tab" data-bs-toggle="tab" data-bs-target="#tab3" type="button" role="tab" aria-controls="tab3" aria-selected="false"><i class="bi bi-translate me-1"></i> 3. 逐段翻譯</button>
+                    </li>
+                    <li class="nav-item" role="presentation">
+                        <button class="nav-link" id="tab4-tab" data-bs-toggle="tab" data-bs-target="#tab4" type="button" role="tab" aria-controls="tab4" aria-selected="false"><i class="bi bi-card-text me-1"></i> 4. 會議結論</button>
+                    </li>
+                </ul>
+            </div>
+            <div class="card-body">
+                <div class="tab-content" id="myTabContent">
+                    <!-- Tab 1: Video to Audio -->
+                    <div class="tab-pane fade show active" id="tab1" role="tabpanel" aria-labelledby="tab1-tab">
+                        <h5 class="card-title">影片轉音訊 (.wav)</h5>
+                        <p class="card-text">從影片檔案中提取音軌，以便進行後續處理。</p>
+                        <div class="mb-3">
+                            <label for="video-file" class="form-label">選擇影片檔案 (.mp4, .mov, .avi):</label>
+                            <input class="form-control" type="file" id="video-file" accept=".mp4,.mov,.avi">
+                        </div>
+                        <button class="btn btn-primary w-100 action-btn" data-task="extract_audio"><i class="bi bi-arrow-repeat me-2"></i>開始轉換</button>
+                    </div>
+
+                    <!-- Tab 2: Audio to Text -->
+                    <div class="tab-pane fade" id="tab2" role="tabpanel" aria-labelledby="tab2-tab">
+                        <h5 class="card-title">音訊轉文字 (Whisper)</h5>
+                        <p class="card-text">將音訊檔案轉錄成帶有時間戳的逐字稿。</p>
+                        <div class="mb-3">
+                            <label for="audio-file" class="form-label">選擇音訊檔案 (.mp3, .wav, .m4a):</label>
+                            <input class="form-control" type="file" id="audio-file" accept=".mp3,.wav,.m4a">
+                        </div>
+                        <div class="row">
+                            <div class="col-md-6 mb-3">
+                                <label for="lang-select" class="form-label">音訊語言:</label>
+                                <select id="lang-select" class="form-select">
+                                    <option value="auto">自動偵測</option>
+                                    <option value="zh">中文</option><option value="en">英文</option>
+                                    <option value="ja">日文</option><option value="ko">韓文</option>
+                                    <option value="vi">越南文</option>
+                                </select>
+                            </div>
+                        </div>
+                        <div class="form-check form-switch mb-3">
+                            <input class="form-check-input" type="checkbox" role="switch" id="use-demucs">
+                            <label class="form-check-label" for="use-demucs">啟用 AI 人聲分離 (適用於嘈雜音訊)</label>
+                        </div>
+                        <button class="btn btn-primary w-100 action-btn" data-task="transcribe_audio"><i class="bi bi-mic-fill me-2"></i>開始轉錄</button>
+                    </div>
+
+                    <!-- Tab 3: Translate Text -->
+                    <div class="tab-pane fade" id="tab3" role="tabpanel" aria-labelledby="tab3-tab">
+                        <h5 class="card-title">逐段翻譯 (Dify)</h5>
+                        <p class="card-text">將逐字稿檔案進行逐段對照翻譯。</p>
+                        <div class="mb-3">
+                            <label for="transcript-file" class="form-label">選擇逐字稿檔案 (.txt):</label>
+                            <input class="form-control" type="file" id="transcript-file" accept=".txt">
+                        </div>
+                        <div class="mb-3">
+                            <label for="translate-lang-select" class="form-label">目標翻譯語言:</label>
+                            <select id="translate-lang-select" class="form-select">
+                                <option value="Traditional Chinese (繁體中文)">繁體中文</option>
+                                <option value="Simplified Chinese (简体中文)">簡體中文</option>
+                                <option value="English">English</option>
+                                <option value="Japanese (日本語)">日本語</option>
+                                <option value="Korean (한국어)">한국어</option>
+                                <option value="Vietnamese (Tiếng Việt)">Tiếng Việt (越南文)</option>
+                                <option value="French (Français)">Français (法文)</option>
+                                <option value="German (Deutsch)">Deutsch (德文)</option>
+                                <option value="Spanish (Español)">Español (西班牙文)</option>
+                            </select>
+                        </div>
+                        <button class="btn btn-primary w-100 action-btn" data-task="translate_text"><i class="bi bi-translate me-2"></i>開始翻譯</button>
+                    </div>
+
+                    <!-- Tab 4: Summarize Text -->
+                    <div class="tab-pane fade" id="tab4" role="tabpanel" aria-labelledby="tab4-tab">
+                        <h5 class="card-title">會議結論整理 (Dify)</h5>
+                        <p class="card-text">從逐字稿或貼上的文字中生成會議摘要。</p>
+                        <div class="mb-3">
+                            <label for="summary-file-input" class="form-label">上傳文稿檔案 (.txt):</label>
+                            <input class="form-control" type="file" id="summary-file-input" accept=".txt">
+                        </div>
+                        <div class="mb-3">
+                            <label for="summary-source-text" class="form-label">或直接貼上文稿:</label>
+                            <textarea id="summary-source-text" class="form-control" rows="6" placeholder="請在此處貼上要總結的完整文字... (如果已選擇檔案，將優先使用檔案內容)"></textarea>
+                        </div>
+                        <div class="mb-3">
+                            <label for="summary-lang-select" class="form-label">結論生成語言:</label>
+                            <select id="summary-lang-select" class="form-select">
+                                <option value="Traditional Chinese (繁體中文)">繁體中文</option>
+                                <option value="Simplified Chinese (简体中文)">簡體中文</option>
+                                <option value="English">English</option>
+                                <option value="Japanese (日本語)">日本語</option>
+                                <option value="Korean (한국어)">한국어</option>
+                                <option value="Vietnamese (Tiếng Việt)">Tiếng Việt (越南文)</option>
+                                <option value="French (Français)">Français (法文)</option>
+                                <option value="German (Deutsch)">Deutsch (德文)</option>
+                                <option value="Spanish (Español)">Español (西班牙文)</option>
+                            </select>
+                        </div>
+                        <button class="btn btn-primary w-100 action-btn" data-task="summarize_text"><i class="bi bi-card-text me-2"></i>產生初版結論</button>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <!-- Progress and Result Section -->
+        <div id="progress-container" class="mt-4" style="display: none;">
+            <div class="card shadow-sm">
+                <div class="card-body">
+                    <h5 class="card-title">處理進度</h5>
+                    <p id="status-text" class="text-muted mb-2">等待中...</p>
+                    <div class="progress" style="height: 25px;">
+                        <div id="progress-bar" class="progress-bar progress-bar-striped progress-bar-animated" role="progressbar" style="width: 0%;" aria-valuenow="0" aria-valuemin="0" aria-valuemax="100">0%</div>
+                    </div>
+                </div>
+            </div>
+        </div>
+
+        <div id="result-container" class="mt-4" style="display: none;">
+            <div class="card shadow-sm">
+                <div class="card-body">
+                    <h5 class="card-title">處理結果</h5>
+                    <div id="text-result-preview" class="result-preview bg-light p-3 rounded border" style="display: none;"></div>
+                    <a id="download-link" href="#" class="btn btn-success mt-3" style="display: none;"><i class="bi bi-download me-2"></i>下載結果檔案</a>
+                    
+                    <!-- Revision Area -->
+                    <div id="revision-area" class="mt-4 pt-3 border-top" style="display:none;">
+                        <h6 class="card-subtitle mb-2 text-muted">不滿意結果嗎？</h6>
+                        <div class="mb-3">
+                            <label for="revision-instruction" class="form-label"><strong>修改指示:</strong></label>
+                            <textarea id="revision-instruction" class="form-control" rows="3" placeholder="請輸入修改要求，例如：請將結論縮減到 3 個重點。"></textarea>
+                        </div>
+                        <button class="btn btn-secondary w-100 action-btn" data-task="revise_summary"><i class="bi bi-pencil-square me-2"></i>根據指示產生修改版</button>
+                    </div>
+                </div>
+            </div>
+        </div>
+    </div>
+
+    <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js"></script>
+    <script src="{{ url_for('static', filename='js/script.js') }}"></script>
+</body>
+</html>