Initial project scaffolding for health tracker app

Set up backend and frontend structure for a health and fitness tracker using Python (FastAPI, SQLModel, DSPy) and React. Includes Docker and Compose configs, authentication, nutrition AI module, health/nutrition/user endpoints, database models, and basic frontend with routing and context. Enables tracking nutrition, health metrics, and user management, with architecture ready for future mobile and cloud deployment.

backend/app/api/v1/endpoints/health.py

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+from typing import Any, List
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+from app.api import deps
+from app.models.health import HealthMetric
+from pydantic import BaseModel
+
+router = APIRouter()
+
+class HealthMetricCreate(BaseModel):
+    metric_type: str
+    value: float
+    unit: str
+    user_id: int # TODO: remove when auth is fully integrated
+
+@router.post("/", response_model=HealthMetric)
+def create_metric(
+    *,
+    session: Session = Depends(deps.get_session),
+    metric_in: HealthMetricCreate,
+) -> Any:
+    metric = HealthMetric(metric_type=metric_in.metric_type, value=metric_in.value, unit=metric_in.unit, user_id=metric_in.user_id)
+    session.add(metric)
+    session.commit()
+    session.refresh(metric)
+    return metric
+
+@router.get("/{user_id}", response_model=List[HealthMetric])
+def read_metrics(
+    user_id: int,
+    session: Session = Depends(deps.get_session),
+) -> Any:
+    statement = select(HealthMetric).where(HealthMetric.user_id == user_id)
+    metrics = session.exec(statement).all()
+    return metrics

backend/app/api/v1/endpoints/login.py

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+from datetime import timedelta
+from typing import Any
+from fastapi import APIRouter, Depends, HTTPException
+from fastapi.security import OAuth2PasswordRequestForm
+from sqlmodel import Session, select
+
+from app.api import deps
+from app.core import security
+from app.config import settings
+from app.models.user import User
+from app.schemas.token import Token
+
+router = APIRouter()
+
+@router.post("/login/access-token", response_model=Token)
+def login_access_token(
+    session: Session = Depends(deps.get_session),
+    form_data: OAuth2PasswordRequestForm = Depends()
+) -> Any:
+    """
+    OAuth2 compatible token login, get an access token for future requests
+    """
+    statement = select(User).where(User.email == form_data.username)
+    user = session.exec(statement).first()
+    
+    if not user or not security.verify_password(form_data.password, user.password_hash):
+        raise HTTPException(status_code=400, detail="Incorrect email or password")
+    
+    access_token_expires = timedelta(minutes=settings.ACCESS_TOKEN_EXPIRE_MINUTES)
+    return {
+        "access_token": security.create_access_token(
+            user.id, expires_delta=access_token_expires
+        ),
+        "token_type": "bearer",
+    }

backend/app/api/v1/endpoints/nutrition.py

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+from typing import Any
+from fastapi import APIRouter, Depends, HTTPException
+from pydantic import BaseModel
+from sqlmodel import Session
+from app.api import deps
+from app.ai.nutrition import nutrition_module, NutritionalInfo
+from app.core.security import create_access_token # Just ensuring we have auth imports if needed later
+from app.models.user import User
+
+router = APIRouter()
+
+class AnalyzeRequest(BaseModel):
+    description: str
+
+from app.models.food import FoodLog, FoodItem
+from app.api.deps import get_session
+from app.core.security import get_password_hash # Not needed
+from app.config import settings
+
+@router.post("/analyze", response_model=NutritionalInfo)
+def analyze_food(
+    request: AnalyzeRequest,
+) -> Any:
+    """
+    Analyze food description and return nutritional info using DSPy.
+    """
+    try:
+        result = nutrition_module(description=request.description)
+        return result.nutritional_info
+    except Exception as e:
+        raise HTTPException(status_code=500, detail=str(e))
+
+@router.post("/log", response_model=FoodLog)
+def log_food(
+    *,
+    session: Session = Depends(deps.get_session),
+    nutrition_info: NutritionalInfo,
+    current_user: deps.CurrentUser,
+) -> Any:
+    """
+    Save food log to database.
+    """
+    food_log = FoodLog(
+        user_id=current_user.id,
+        name=nutrition_info.name,
+        calories=nutrition_info.calories,
+        protein=nutrition_info.protein,
+        carbs=nutrition_info.carbs,
+        fats=nutrition_info.fats,
+    )
+    session.add(food_log)
+    session.commit()
+    session.refresh(food_log)
+    return food_log

backend/app/api/v1/endpoints/users.py

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+from typing import Any
+from fastapi import APIRouter, Depends, HTTPException
+from sqlmodel import Session, select
+
+from app.api import deps
+from app.core import security
+from app.models.user import User
+from app.schemas.user import UserCreate, UserRead
+
+router = APIRouter()
+
+@router.post("/", response_model=UserRead)
+def create_user(
+    *,
+    session: Session = Depends(deps.get_session),
+    user_in: UserCreate,
+) -> Any:
+    """
+    Create new user.
+    """
+    user = session.exec(select(User).where(User.email == user_in.email)).first()
+    if user:
+        raise HTTPException(
+            status_code=400,
+            detail="The user with this email already exists in the system",
+        )
+    
+    user = User(
+        email=user_in.email,
+        username=user_in.username,
+        password_hash=security.get_password_hash(user_in.password),
+    )
+    session.add(user)
+    session.commit()
+    session.refresh(user)
+    return user