feat: merge cartsnitch/api into api/ subdirectory

Consolidate API gateway service into monorepo.
Squashed from https://github.com/cartsnitch/api main (89bacb1).

Co-Authored-By: Paperclip <noreply@paperclip.ing>

src/cartsnitch_api/auth/routes.py

@@ -0,0 +1,96 @@
+"""Auth routes: register, login, refresh, me, update, delete."""
+
+from uuid import UUID
+
+from fastapi import APIRouter, Depends, HTTPException, status
+from sqlalchemy.ext.asyncio import AsyncSession
+
+from cartsnitch_api.auth.dependencies import get_current_user
+from cartsnitch_api.database import get_db
+from cartsnitch_api.schemas import (
+    LoginRequest,
+    RefreshRequest,
+    RegisterRequest,
+    TokenResponse,
+    UpdateUserRequest,
+    UserResponse,
+)
+from cartsnitch_api.services.auth import AuthService
+
+router = APIRouter(prefix="/auth", tags=["auth"])
+
+
+@router.post("/register", response_model=TokenResponse, status_code=status.HTTP_201_CREATED)
+async def register(body: RegisterRequest, db: AsyncSession = Depends(get_db)):
+    svc = AuthService(db)
+    try:
+        return await svc.register(body.email, body.password, body.display_name)
+    except ValueError as e:
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(e)) from e
+
+
+@router.post("/login", response_model=TokenResponse)
+async def login(body: LoginRequest, db: AsyncSession = Depends(get_db)):
+    svc = AuthService(db)
+    try:
+        return await svc.login(body.email, body.password)
+    except ValueError:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid email or password"
+        ) from None
+
+
+@router.post("/refresh", response_model=TokenResponse)
+async def refresh(body: RefreshRequest, db: AsyncSession = Depends(get_db)):
+    svc = AuthService(db)
+    try:
+        return await svc.refresh(body.refresh_token)
+    except ValueError:
+        raise HTTPException(
+            status_code=status.HTTP_401_UNAUTHORIZED, detail="Invalid refresh token"
+        ) from None
+
+
+@router.get("/me", response_model=UserResponse)
+async def get_me(
+    user_id: UUID = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    svc = AuthService(db)
+    try:
+        return await svc.get_user(user_id)
+    except LookupError:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+        ) from None
+
+
+@router.patch("/me", response_model=UserResponse)
+async def update_me(
+    body: UpdateUserRequest,
+    user_id: UUID = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    svc = AuthService(db)
+    try:
+        return await svc.update_user(user_id, email=body.email, display_name=body.display_name)
+    except LookupError:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+        ) from None
+    except ValueError as e:
+        raise HTTPException(status_code=status.HTTP_409_CONFLICT, detail=str(e)) from e
+
+
+@router.delete("/me", status_code=status.HTTP_204_NO_CONTENT)
+async def delete_me(
+    user_id: UUID = Depends(get_current_user),
+    db: AsyncSession = Depends(get_db),
+):
+    svc = AuthService(db)
+    try:
+        await svc.delete_user(user_id)
+    except LookupError:
+        raise HTTPException(
+            status_code=status.HTTP_404_NOT_FOUND, detail="User not found"
+        ) from None