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

backend/app/routers/contacts.py

@@ -25,8 +25,12 @@ router = APIRouter(prefix="/contacts", tags=["contacts"])
 async def list_contacts(
     db: AsyncSession = Depends(get_db),
     pagination: dict = Depends(get_pagination),
-    search: str | None = Query(None, description="Search in company_name, city, email, vat_id"),
-    role: str | None = Query(None, description="Filter by role (kaeufer, verkaeufer, beide)"),
+    search: str | None = Query(
+        None, description="Search in company_name, city, email, vat_id"
+    ),
+    role: str | None = Query(
+        None, description="Filter by role (kaeufer, verkaeufer, beide)"
+    ),
     is_eu: bool | None = Query(None, description="Filter EU (true) or Inland (false)"),
     is_private: bool | None = Query(None, description="Filter private contacts"),
     sort: str | None = Query(None, description="Sort field (prefix - for descending)"),
@@ -66,7 +70,9 @@ async def create_contact(
     return ContactResponse.model_validate(contact)
 
 
-@router.get("/{contact_id}", response_model=ContactResponse, status_code=status.HTTP_200_OK)
+@router.get(
+    "/{contact_id}", response_model=ContactResponse, status_code=status.HTTP_200_OK
+)
 async def get_contact(
     contact_id: uuid.UUID,
     db: AsyncSession = Depends(get_db),
@@ -77,12 +83,16 @@ async def get_contact(
     if contact is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
-            detail={"error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}},
+            detail={
+                "error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}
+            },
         )
     return ContactResponse.model_validate(contact)
 
 
-@router.put("/{contact_id}", response_model=ContactResponse, status_code=status.HTTP_200_OK)
+@router.put(
+    "/{contact_id}", response_model=ContactResponse, status_code=status.HTTP_200_OK
+)
 async def update_contact(
     contact_id: uuid.UUID,
     body: ContactUpdate,
@@ -100,12 +110,16 @@ async def update_contact(
     if contact is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
-            detail={"error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}},
+            detail={
+                "error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}
+            },
         )
     return ContactResponse.model_validate(contact)
 
 
-@router.delete("/{contact_id}", response_model=ContactResponse, status_code=status.HTTP_200_OK)
+@router.delete(
+    "/{contact_id}", response_model=ContactResponse, status_code=status.HTTP_200_OK
+)
 async def delete_contact(
     contact_id: uuid.UUID,
     db: AsyncSession = Depends(get_db),
@@ -116,7 +130,9 @@ async def delete_contact(
     if contact is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
-            detail={"error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}},
+            detail={
+                "error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}
+            },
         )
     return ContactResponse.model_validate(contact)
 
@@ -139,7 +155,9 @@ async def add_contact_person(
     if person is None:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
-            detail={"error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}},
+            detail={
+                "error": {"code": "CONTACT_NOT_FOUND", "message": "Contact not found"}
+            },
         )
     return ContactPersonResponse.model_validate(person)
 
@@ -159,6 +177,11 @@ async def remove_contact_person(
     if not deleted:
         raise HTTPException(
             status_code=status.HTTP_404_NOT_FOUND,
-            detail={"error": {"code": "PERSON_NOT_FOUND", "message": "Contact person not found"}},
+            detail={
+                "error": {
+                    "code": "PERSON_NOT_FOUND",
+                    "message": "Contact person not found",
+                }
+            },
         )
     return None