Initial commit: Happy Up monorepo through Sprint 5.

Document-driven MVP with FastAPI backend, Vue H5, WeChat mini shell, product demo, and Docker dev stack.

Co-authored-by: Cursor <cursoragent@cursor.com>

apps/api/app/main.py

@@ -0,0 +1,60 @@
+from fastapi import FastAPI, HTTPException, Request
+from fastapi.middleware.cors import CORSMiddleware
+from fastapi.responses import JSONResponse
+from pathlib import Path
+
+from app.config import settings
+from app.middleware import RequestContextMiddleware
+from app.routers import admin, analysis, auth, children, reports, training, videos
+
+CONTRACTS_OPENAPI = Path(__file__).resolve().parents[3] / "contracts" / "openapi.yaml"
+
+app = FastAPI(
+    title="Kids AI Posture Platform API",
+    version="0.6.0",
+    description=(
+        "儿童 AI 体态管理平台 API · Sprint 5。"
+        "MediaPipe 帧级评分 + PDF 导出 + OSS 生产配置 + H5/小程序对接。"
+    ),
+)
+
+app.add_middleware(RequestContextMiddleware)
+
+_cors_origins = ["*"] if settings.app_debug else settings.cors_origin_list
+app.add_middleware(
+    CORSMiddleware,
+    allow_origins=_cors_origins,
+    allow_credentials=True,
+    allow_methods=["*"],
+    allow_headers=["*"],
+)
+
+app.include_router(auth.router)
+app.include_router(children.router)
+app.include_router(videos.router)
+app.include_router(analysis.router)
+app.include_router(reports.router)
+app.include_router(training.router)
+app.include_router(admin.router)
+
+
+@app.exception_handler(HTTPException)
+async def http_exception_handler(request: Request, exc: HTTPException):
+    if isinstance(exc.detail, dict) and "meta" in exc.detail:
+        return JSONResponse(status_code=exc.status_code, content=exc.detail)
+    return JSONResponse(status_code=exc.status_code, content={"detail": exc.detail})
+
+
+@app.get("/health")
+def health():
+    return {"status": "ok", "env": settings.app_env, "stage": "sprint5"}
+
+
+@app.get("/")
+def root():
+    return {
+        "name": settings.app_name,
+        "docs": "/docs",
+        "contract": str(CONTRACTS_OPENAPI),
+        "stage": "sprint5-mediapipe-pdf-oss",
+    }