feat: Introduce recipe favoriting with star icon toggle and filter options.

py/routes/handlers/recipe_handlers.py

@@ -170,6 +170,9 @@ class RecipeListingHandler:
             if base_models:
                 filters["base_model"] = base_models.split(",")
 
+            if request.query.get("favorite", "false").lower() == "true":
+                filters["favorite"] = True
+
             tag_filters: Dict[str, str] = {}
             legacy_tags = request.query.get("tags")
             if legacy_tags:

py/services/recipe_scanner.py

@@ -1122,6 +1122,13 @@ class RecipeScanner:
                         if item.get('base_model', '') in filters['base_model']
                     ]
                 
+                # Filter by favorite
+                if 'favorite' in filters and filters['favorite']:
+                    filtered_data = [
+                        item for item in filtered_data
+                        if item.get('favorite') is True
+                    ]
+
                 # Filter by tags
                 if 'tags' in filters and filters['tags']:
                     tag_spec = filters['tags']

py/services/recipes/persistence_service.py

@@ -173,9 +173,9 @@ class RecipePersistenceService:
     async def update_recipe(self, *, recipe_scanner, recipe_id: str, updates: dict[str, Any]) -> PersistenceResult:
         """Update persisted metadata for a recipe."""
 
-        if not any(key in updates for key in ("title", "tags", "source_path", "preview_nsfw_level")):
+        if not any(key in updates for key in ("title", "tags", "source_path", "preview_nsfw_level", "favorite")):
             raise RecipeValidationError(
-                "At least one field to update must be provided (title or tags or source_path or preview_nsfw_level)"
+                "At least one field to update must be provided (title or tags or source_path or preview_nsfw_level or favorite)"
             )
 
         success = await recipe_scanner.update_recipe_metadata(recipe_id, updates)