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

backend/app/schemas/user.py

@@ -9,12 +9,14 @@ from pydantic import BaseModel, ConfigDict, EmailStr, Field
 
 class LoginRequest(BaseModel):
     """POST /api/v1/auth/login request body."""
+
     email: EmailStr
     password: str = Field(..., min_length=1)
 
 
 class TokenResponse(BaseModel):
     """JWT token pair returned after login or refresh."""
+
     access_token: str
     refresh_token: str
     token_type: str = "bearer"
@@ -23,11 +25,13 @@ class TokenResponse(BaseModel):
 
 class RefreshRequest(BaseModel):
     """POST /api/v1/auth/refresh request body."""
+
     refresh_token: str
 
 
 class UserBase(BaseModel):
     """Base user fields shared across schemas."""
+
     email: EmailStr
     full_name: str = Field(..., min_length=1, max_length=200)
     role: Literal["admin", "verkaeufer", "buchhaltung"] = "verkaeufer"
@@ -36,11 +40,13 @@ class UserBase(BaseModel):
 
 class UserCreate(UserBase):
     """POST /api/v1/users request body."""
+
     password: str = Field(..., min_length=8, max_length=128)
 
 
 class UserUpdate(BaseModel):
     """PUT /api/v1/users/:id request body (all fields optional)."""
+
     email: Optional[EmailStr] = None
     full_name: Optional[str] = Field(None, min_length=1, max_length=200)
     role: Optional[Literal["admin", "verkaeufer", "buchhaltung"]] = None
@@ -50,6 +56,7 @@ class UserUpdate(BaseModel):
 
 class UserResponse(BaseModel):
     """User response schema (never exposes password_hash)."""
+
     model_config = ConfigDict(from_attributes=True)
 
     id: uuid.UUID
@@ -64,6 +71,7 @@ class UserResponse(BaseModel):
 
 class UserListResponse(BaseModel):
     """Paginated user list response."""
+
     items: list[UserResponse]
     total: int
     page: int
@@ -72,9 +80,11 @@ class UserListResponse(BaseModel):
 
 class ErrorResponse(BaseModel):
     """Standard error response format."""
+
     error: dict
 
 
 class HealthResponse(BaseModel):
     """Health check response."""
+
     status: str = "ok"