Refactor test cases for improved readability and consistency

- Updated test functions in various test files to enhance code clarity by formatting long lines and improving indentation.
- Adjusted assertions to use multi-line formatting for better readability.
- Added new test cases for theme settings API to ensure proper functionality.
- Ensured consistent use of line breaks and spacing across test files for uniformity.

routes/production.py

@@ -36,8 +36,14 @@ class ProductionOutputRead(ProductionOutputBase):
     model_config = ConfigDict(from_attributes=True)
 
 
-@router.post("/", response_model=ProductionOutputRead, status_code=status.HTTP_201_CREATED)
-def create_production(item: ProductionOutputCreate, db: Session = Depends(get_db)):
+@router.post(
+    "/",
+    response_model=ProductionOutputRead,
+    status_code=status.HTTP_201_CREATED,
+)
+def create_production(
+    item: ProductionOutputCreate, db: Session = Depends(get_db)
+):
     db_item = ProductionOutput(**item.model_dump())
     db.add(db_item)
     db.commit()