Kompletter Rewrite

models/category.py

@@ -0,0 +1,31 @@
+from typing import List, Set
+
+
+class CategoryManager:
+    def __init__(self):
+        self._categories: Set[str] = set()
+    
+    @property
+    def categories(self) -> List[str]:
+        return sorted(list(self._categories))
+    
+    def add_category(self, category: str) -> bool:
+        if not category or category in self._categories:
+            return False
+        self._categories.add(category)
+        return True
+    
+    def remove_category(self, category: str) -> bool:
+        if category not in self._categories:
+            return False
+        self._categories.remove(category)
+        return True
+    
+    def has_category(self, category: str) -> bool:
+        return category in self._categories
+    
+    def load_from_data(self, categories: List[str]):
+        self._categories = set(categories)
+    
+    def to_list(self) -> List[str]:
+        return self.categories