feat: Docker化部署 - 單容器架構轉換

將 Tool_OCR 從 macOS conda 環境轉換為 Docker 單容器部署方案。
前後端整合於同一容器，通過 Nginx 反向代理，僅對外暴露單一端口。

## 新增功能
- Docker 單容器架構（Frontend + Backend + Nginx）
- 多階段構建優化鏡像大小
- Supervisor 進程管理
- 健康檢查機制
- 完整部署文檔

## 技術細節
- 對外端口：12015（原 12010 已被佔用）
- 內部架構：Nginx(12015) → FastAPI(8000)
- 前端靜態文件由 Nginx 直接服務
- API 請求通過 Nginx 反向代理

## 系統依賴完善
- libmagic1：文件類型檢測
- LibreOffice：Office 文檔轉換
- paddlex[ocr]：PP-StructureV3 版面分析
- 中日韓字體支援

## 配置調整
- 環境變數路徑：macOS 路徑 → 容器絕對路徑
- 前端 API URL：修正為統一端口 12015
- Pip 安裝：延長超時至 600 秒，重試 5 次
- CRLF 轉換：自動處理 Windows 換行符

## 清理
- 移除臨時文檔（API_FIX_SUMMARY.md 等 7 個文檔）

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,97 @@
+services:
+  tool_ocr:
+    build:
+      context: .
+      dockerfile: Dockerfile
+    image: tool_ocr:latest
+    container_name: tool_ocr
+    restart: unless-stopped
+
+    ports:
+      - "12015:12015"  # Only one port needed!
+
+    environment:
+      # Database Configuration
+      - MYSQL_HOST=${MYSQL_HOST:-mysql.theaken.com}
+      - MYSQL_PORT=${MYSQL_PORT:-33306}
+      - MYSQL_USER=${MYSQL_USER:-A060}
+      - MYSQL_PASSWORD=${MYSQL_PASSWORD:-WLeSCi0yhtc7}
+      - MYSQL_DATABASE=${MYSQL_DATABASE:-db_A060}
+
+      # Application Configuration
+      - BACKEND_PORT=8000  # Internal backend port
+      - FRONTEND_PORT=12015  # External port
+      - SECRET_KEY=${SECRET_KEY:-your-secret-key-here-please-change-this}
+      - ALGORITHM=${ALGORITHM:-HS256}
+      - ACCESS_TOKEN_EXPIRE_MINUTES=${ACCESS_TOKEN_EXPIRE_MINUTES:-1440}
+
+      # OCR Configuration
+      - PADDLEOCR_MODEL_DIR=/app/backend/models/paddleocr
+      - OCR_LANGUAGES=${OCR_LANGUAGES:-ch,en,japan,korean}
+      - OCR_CONFIDENCE_THRESHOLD=${OCR_CONFIDENCE_THRESHOLD:-0.5}
+      - MAX_OCR_WORKERS=${MAX_OCR_WORKERS:-4}
+
+      # File Upload Configuration
+      - MAX_UPLOAD_SIZE=${MAX_UPLOAD_SIZE:-52428800}
+      - ALLOWED_EXTENSIONS=${ALLOWED_EXTENSIONS:-png,jpg,jpeg,pdf,bmp,tiff,doc,docx,ppt,pptx}
+      - UPLOAD_DIR=/app/backend/uploads
+      - TEMP_DIR=/app/backend/uploads/temp
+      - PROCESSED_DIR=/app/backend/uploads/processed
+      - IMAGES_DIR=/app/backend/uploads/images
+
+      # Export Configuration
+      - STORAGE_DIR=/app/backend/storage
+      - MARKDOWN_DIR=/app/backend/storage/markdown
+      - JSON_DIR=/app/backend/storage/json
+      - EXPORTS_DIR=/app/backend/storage/exports
+
+      # PDF Generation Configuration
+      - PANDOC_PATH=/usr/bin/pandoc
+      - FONT_DIR=/usr/share/fonts
+      - PDF_PAGE_SIZE=${PDF_PAGE_SIZE:-A4}
+      - PDF_MARGIN_TOP=${PDF_MARGIN_TOP:-20}
+      - PDF_MARGIN_BOTTOM=${PDF_MARGIN_BOTTOM:-20}
+      - PDF_MARGIN_LEFT=${PDF_MARGIN_LEFT:-20}
+      - PDF_MARGIN_RIGHT=${PDF_MARGIN_RIGHT:-20}
+
+      # Translation Configuration (Reserved)
+      - ENABLE_TRANSLATION=${ENABLE_TRANSLATION:-false}
+      - TRANSLATION_ENGINE=${TRANSLATION_ENGINE:-offline}
+      - ARGOSTRANSLATE_MODELS_DIR=/app/backend/models/argostranslate
+
+      # Background Tasks Configuration
+      - TASK_QUEUE_TYPE=${TASK_QUEUE_TYPE:-memory}
+
+      # CORS Configuration
+      - CORS_ORIGINS=${CORS_ORIGINS:-http://localhost:12015,http://127.0.0.1:12015}
+
+      # Logging Configuration
+      - LOG_LEVEL=${LOG_LEVEL:-INFO}
+      - LOG_FILE=/app/backend/logs/app.log
+
+    volumes:
+      # Persist data directories
+      - ./data/uploads:/app/backend/uploads
+      - ./data/storage:/app/backend/storage
+      - ./data/models:/app/backend/models
+      - ./data/logs:/app/backend/logs
+
+    networks:
+      - tool_ocr_network
+
+    healthcheck:
+      test: ["CMD", "curl", "-f", "http://localhost:12010/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+
+networks:
+  tool_ocr_network:
+    driver: bridge
+
+volumes:
+  uploads:
+  storage:
+  models:
+  logs: