feat: 添加 Docker 部署支持和多 OCR 提供商架构

- 添加完整的 Docker 配置 (Dockerfile, docker-compose.yml)
- 修复前端硬编码端口 4000，改用相对路径 /api
- 实现多 OCR 提供商架构 (Tesseract.js/Baidu/RapidOCR)
- 修复 Docker 环境中图片上传路径问题
- 添加用户设置页面和 AI 分析服务
- 更新 Prisma schema 支持 AI 分析结果
- 添加部署文档和 OCR 配置指南

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

docker-compose.yml

@@ -0,0 +1,72 @@
+services:
+  # ========================
+  # Backend Service
+  # ========================
+  backend:
+    build:
+      context: ./backend
+      dockerfile: Dockerfile
+    container_name: picanalysis-backend
+    restart: unless-stopped
+    environment:
+      NODE_ENV: production
+      DATABASE_URL: file:./prod.db
+      PORT: 13057
+      CORS_ORIGIN: http://localhost:13056
+      JWT_SECRET: ${JWT_SECRET}
+      JWT_EXPIRES_IN: ${JWT_EXPIRES_IN:-24h}
+      OCR_PROVIDER: ${OCR_PROVIDER:-tesseract}
+      OCR_CONFIDENCE_THRESHOLD: ${OCR_CONFIDENCE_THRESHOLD:-0.3}
+      BAIDU_OCR_API_KEY: ${BAIDU_OCR_API_KEY:-}
+      BAIDU_OCR_SECRET_KEY: ${BAIDU_OCR_SECRET_KEY:-}
+      GLM_API_KEY: ${GLM_API_KEY:-}
+      GLM_API_URL: ${GLM_API_URL:-https://open.bigmodel.cn/api/paas/v4/chat/completions}
+      GLM_MODEL: ${GLM_MODEL:-glm-4-flash}
+      MINIMAX_API_KEY: ${MINIMAX_API_KEY:-}
+      DEEPSEEK_API_KEY: ${DEEPSEEK_API_KEY:-}
+      UPLOAD_MAX_SIZE: ${UPLOAD_MAX_SIZE:-10485760}
+      UPLOAD_ALLOWED_TYPES: ${UPLOAD_ALLOWED_TYPES:-image/jpeg,image/png,image/webp}
+    volumes:
+      # Persist database and uploads
+      - backend-data:/app/data
+      - backend-uploads:/app/uploads
+    networks:
+      - picanalysis-network
+    healthcheck:
+      test: ["CMD", "wget", "--no-verbose", "--tries=1", "--spider", "http://localhost:13057/api/health"]
+      interval: 30s
+      timeout: 10s
+      retries: 3
+      start_period: 40s
+
+  # ========================
+  # Frontend Service
+  # ========================
+  frontend:
+    build:
+      context: ./frontend
+      dockerfile: Dockerfile
+    container_name: picanalysis-frontend
+    restart: unless-stopped
+    ports:
+      - "${FRONTEND_PORT:-13056}:80"
+    networks:
+      - picanalysis-network
+    depends_on:
+      - backend
+
+# ========================
+# Volumes
+# ========================
+volumes:
+  backend-data:
+    driver: local
+  backend-uploads:
+    driver: local
+
+# ========================
+# Networks
+# ========================
+networks:
+  picanalysis-network:
+    driver: bridge