fix: resolver problema de resolucion de modulo jwt y corregir lints de JobsView y service

backend/app/api/auth.py

@@ -16,6 +16,7 @@ logger = logging.getLogger("uvicorn.error")
 @router.post("/login", response_model=TokenResponse)
 async def login(credentials: LoginRequest, db: AsyncSession = Depends(get_db)):
     email_clean = credentials.email.strip().lower()
+    
     result = await db.execute(select(User).where(User.email == email_clean))
     user = result.scalar_one_or_none()