fix: ruff lint + format fixes in tests, ESLint fixes in frontend

backend/app/main.py

@@ -9,7 +9,18 @@ from fastapi import APIRouter, FastAPI
 from fastapi.middleware.cors import CORSMiddleware
 
 from app.config import settings
-from app.routers import auth, contacts, copilot, datev, files, image_retouch, ocr, sales, users, vehicles
+from app.routers import (
+    auth,
+    contacts,
+    copilot,
+    datev,
+    files,
+    image_retouch,
+    ocr,
+    sales,
+    users,
+    vehicles,
+)
 
 
 @asynccontextmanager
@@ -49,6 +60,7 @@ api_v1_router.include_router(datev.router)
 api_v1_router.include_router(copilot.router)
 api_v1_router.include_router(image_retouch.router)
 
+
 # Health endpoint (no auth required)
 @api_v1_router.get("/health", tags=["health"])
 async def health_check():