feat: 初始化孕育无忧全栈项目基础代码结构

完成项目初始搭建，包含后端FastAPI+MongoDB服务、前端React+Vite项目的完整基础结构，添加各类配置文件与依赖清单，涵盖核心业务初始框架。

backend/app/routers/user.py

@@ -0,0 +1,84 @@
+from datetime import datetime, timezone
+
+from fastapi import APIRouter, Depends
+
+from app.middleware.auth import get_current_user
+from app.models.user import User
+from app.schemas.user import (
+    OnboardingRequest,
+    UserProfileUpdate,
+    UserProfileResponse,
+)
+
+router = APIRouter()
+
+
+def _user_to_response(user: User) -> UserProfileResponse:
+    return UserProfileResponse(
+        id=str(user.id),
+        name=user.name,
+        phone=user.phone,
+        age=user.age,
+        height=user.height,
+        pre_pregnancy_weight=user.pre_pregnancy_weight,
+        current_weight=user.current_weight,
+        blood_type=user.blood_type,
+        allergies=user.allergies,
+        medical_history=user.medical_history,
+        last_period_date=user.last_period_date,
+        due_date=user.due_date,
+        pregnancy_week=user.pregnancy_week,
+        pregnancy_day=user.pregnancy_day,
+        multiple_pregnancy=user.multiple_pregnancy,
+        pregnancy_count=user.pregnancy_count,
+        emergency_contact=user.emergency_contact.model_dump() if user.emergency_contact else None,
+        is_onboarded=user.is_onboarded,
+        avatar_url=user.avatar_url,
+        created_at=user.created_at,
+    )
+
+
+@router.get("/profile", response_model=UserProfileResponse)
+async def get_profile(user: User = Depends(get_current_user)):
+    """获取用户信息"""
+    return _user_to_response(user)
+
+
+@router.post("/onboarding", response_model=UserProfileResponse)
+async def complete_onboarding(
+    req: OnboardingRequest, user: User = Depends(get_current_user)
+):
+    """完成用户画像设置"""
+    user.name = req.name or user.name
+    user.age = req.age
+    user.height = req.height
+    user.pre_pregnancy_weight = req.pre_pregnancy_weight
+    user.current_weight = req.current_weight
+    user.blood_type = req.blood_type
+    user.allergies = req.allergies
+    user.medical_history = req.medical_history
+    user.last_period_date = req.last_period_date
+    user.due_date = req.due_date
+    user.pregnancy_week = req.pregnancy_week
+    user.pregnancy_day = req.pregnancy_day
+    user.multiple_pregnancy = req.multiple_pregnancy
+    user.pregnancy_count = req.pregnancy_count
+    if req.emergency_contact:
+        user.emergency_contact = req.emergency_contact
+    user.is_onboarded = True
+    user.updated_at = datetime.now(timezone.utc)
+    await user.save()
+    return _user_to_response(user)
+
+
+@router.put("/profile", response_model=UserProfileResponse)
+async def update_profile(
+    req: UserProfileUpdate, user: User = Depends(get_current_user)
+):
+    """更新用户信息"""
+    update_data = req.model_dump(exclude_unset=True)
+    for field, value in update_data.items():
+        setattr(user, field, value)
+    user.updated_at = datetime.now(timezone.utc)
+    await user.save()
+    return _user_to_response(user)