feat: frontend core — auth, layout, transactions, categories

backend/app/auth/router.py

@@ -127,6 +127,11 @@ async def refresh_token(
     return TokenRefresh(access_token=new_access_token, token_type="bearer")
 
 
+@router.get("/me", response_model=UserResponse)
+async def get_me(current_user: User = Depends(get_current_user)) -> UserResponse:
+    return UserResponse.model_validate(current_user)
+
+
 @router.post("/logout", status_code=status.HTTP_204_NO_CONTENT)
 async def logout(
     data: TokenRefreshRequest,