完成后端数据库连接配置

backend/app/api/__init__.py

@@ -2,13 +2,28 @@
 API 路由注册模块
 """
 from fastapi import APIRouter
-from app.api.endpoints import upload, ai_analyze, visualization, analysis_charts
+from app.api.endpoints import (
+    upload,
+    documents,    # 新增：文档上传
+    tasks,       # 新增：任务管理
+    library,     # 新增：文档库
+    rag,         # 新增：RAG检索
+    ai_analyze,
+    visualization,
+    analysis_charts,
+    health,
+)
 
 # 创建主路由
 api_router = APIRouter()
 
 # 注册各模块路由
-api_router.include_router(upload.router)
-api_router.include_router(ai_analyze.router)
-api_router.include_router(visualization.router)
-api_router.include_router(analysis_charts.router)
+api_router.include_router(health.router)          # 健康检查
+api_router.include_router(upload.router)           # 原有Excel上传
+api_router.include_router(documents.router)        # 多格式文档上传
+api_router.include_router(tasks.router)           # 任务状态查询
+api_router.include_router(library.router)         # 文档库管理
+api_router.include_router(rag.router)             # RAG检索
+api_router.include_router(ai_analyze.router)      # AI分析
+api_router.include_router(visualization.router)    # 可视化
+api_router.include_router(analysis_charts.router) # 分析图表