feat: 新增可配置的路径前缀以支持子路径部署

添加前后端环境变量配置示例，新增后端路径前缀配置项，更新后端路由与静态文件挂载逻辑，调整前端代理配置与 API 调用代码，适配子路径部署场景。

backend/.env.example

@@ -1,29 +1,37 @@
-# MongoDB
-MONGODB_URL=mongodb://localhost:27017
-MONGODB_DB_NAME=pregnancy_report
+# Path Prefix
+API_PREFIX=/app_03/api
+UPLOADS_PREFIX=/uploads
+
+# MongoDB (通过 SSH 隧道连接到服务器)
+# MONGODB_URL=mongodb+srv://shutiaozhao127_db_user:YEJzZUi0nbEuFYL3@cluster0.bkztgqx.mongodb.net/?appName=Cluster0
+# MONGODB_DB_NAME=pregnancy_report
+MONGODB_URL=mongodb://root:mgdb4link@localhost:27017/?authSource=admin
+MONGODB_DB_NAME=app_03_dev
 
 # JWT
-JWT_SECRET_KEY=your-secret-key-change-this
+JWT_SECRET_KEY=pregnancy_ai_demo_666888
 JWT_ALGORITHM=HS256
 JWT_EXPIRE_MINUTES=10080
 
 # WeChat Mini Program
-WECHAT_APP_ID=your-wechat-app-id
-WECHAT_APP_SECRET=your-wechat-app-secret
+WECHAT_APP_ID=
+WECHAT_APP_SECRET=
 
-# Claude AI
-ANTHROPIC_API_KEY=your-anthropic-api-key
-ANTHROPIC_BASE_URL=
-AI_MODEL_NAME=claude-sonnet-4-20250514
+# AI API (硅基流动 - OpenAI 兼容接口)
+AI_API_KEY=sk-pnbkufcvwbnmzcwdhwzecdgpiqqsumtsnfojtozmmrfqiuil
+AI_BASE_URL=https://api.siliconflow.cn/v1
+AI_VISION_MODEL=Qwen/Qwen2.5-VL-72B-Instruct
+AI_TEXT_MODEL=Qwen/Qwen3-235B-A22B-Instruct-2507
 
 # CORS（多个域名逗号分隔，* 表示允许所有）
 CORS_ORIGINS=*
 
+
 # File Upload
 UPLOAD_DIR=./uploads
 MAX_FILE_SIZE=10485760
 
 # Server
 HOST=0.0.0.0
-PORT=8000
+PORT=8030
 DEBUG=true

backend/app/config.py

@@ -2,6 +2,10 @@ from pydantic_settings import BaseSettings
 
 
 class Settings(BaseSettings):
+    # Path Prefix
+    api_prefix: str = "/api"
+    uploads_prefix: str = "/uploads"
+
     # MongoDB
     mongodb_url: str = "mongodb://localhost:27017"
     mongodb_db_name: str = "pregnancy_report"

backend/app/main.py

@@ -48,6 +48,14 @@ app = FastAPI(
     lifespan=lifespan,
 )
 
+api_prefix = settings.api_prefix.rstrip("/") or ""
+if api_prefix and not api_prefix.startswith("/"):
+    api_prefix = f"/{api_prefix}"
+
+uploads_prefix = settings.uploads_prefix.rstrip("/") or ""
+if uploads_prefix and not uploads_prefix.startswith("/"):
+    uploads_prefix = f"/{uploads_prefix}"
+
 # CORS 配置
 cors_origins = (
     ["*"]
@@ -88,20 +96,20 @@ async def global_exception_handler(request: Request, exc: Exception):
         content={"detail": "服务器内部错误，请稍后重试"},
     )
 
-app.mount("/uploads", StaticFiles(directory=settings.upload_dir), name="uploads")
+app.mount(uploads_prefix or "/uploads", StaticFiles(directory=settings.upload_dir), name="uploads")
 
-app.include_router(auth.router, prefix="/api/auth", tags=["认证"])
-app.include_router(user.router, prefix="/api/user", tags=["用户"])
-app.include_router(report.router, prefix="/api/report", tags=["报告"])
-app.include_router(analysis.router, prefix="/api/analysis", tags=["AI解读"])
-app.include_router(chat.router, prefix="/api/chat", tags=["AI对话"])
-app.include_router(health_records.router, prefix="/api/health-records", tags=["健康档案"])
-app.include_router(calendar.router, prefix="/api/calendar", tags=["产检日历"])
-app.include_router(doctor.router, prefix="/api/doctor", tags=["专家咨询"])
-app.include_router(share.router, prefix="/api/share", tags=["分享"])
+app.include_router(auth.router, prefix=f"{api_prefix}/auth", tags=["认证"])
+app.include_router(user.router, prefix=f"{api_prefix}/user", tags=["用户"])
+app.include_router(report.router, prefix=f"{api_prefix}/report", tags=["报告"])
+app.include_router(analysis.router, prefix=f"{api_prefix}/analysis", tags=["AI解读"])
+app.include_router(chat.router, prefix=f"{api_prefix}/chat", tags=["AI对话"])
+app.include_router(health_records.router, prefix=f"{api_prefix}/health-records", tags=["健康档案"])
+app.include_router(calendar.router, prefix=f"{api_prefix}/calendar", tags=["产检日历"])
+app.include_router(doctor.router, prefix=f"{api_prefix}/doctor", tags=["专家咨询"])
+app.include_router(share.router, prefix=f"{api_prefix}/share", tags=["分享"])
 
 
-@app.get("/api/health")
+@app.get(f"{api_prefix}/health")
 async def health_check():
     return {"status": "ok", "service": "孕育无忧 API"}
 

backend/app/static/index.html

@@ -225,6 +225,7 @@ textarea{width:100%;padding:10px;border:1px solid #ddd;border-radius:8px;font-si
 
 <script>
 const API = '';
+const API_PREFIX = window.location.pathname.startsWith('/app_03') ? '/app_03/api' : '/api';
 let TOKEN = '';
 let currentReportId = '';
 let ocrDataItems = [];
@@ -237,6 +238,7 @@ function showLoading(text='加载中...'){
 function hideLoading(){document.getElementById('globalLoading').style.display='none'}
 
 async function api(path,opts={}){
+  if(path.startsWith('/api/')) path = API_PREFIX + path.slice(4);
   const headers = {'Authorization':'Bearer '+TOKEN, ...(opts.headers||{})};
   if(opts.body && !(opts.body instanceof FormData)){
     headers['Content-Type']='application/json';
@@ -270,7 +272,7 @@ function badgeHtml(status){
 async function demoLogin(){
   showLoading('正在登录...');
   try{
-    const data = await fetch(API+'/api/auth/demo-login',{method:'POST'}).then(r=>r.json());
+    const data = await api('/api/auth/demo-login',{method:'POST'});
     TOKEN = data.access_token;
     hideLoading();
   }catch(e){