refactor main controller and main window to streamline color loading and widget initialization

controllers/main_controller.py

@@ -0,0 +1,18 @@
+from core.database import DatabaseManager
+from core.media import MediaRepository
+from ui.widgets.color_list_widget import ColorListWidget
+
+
+class MainController:
+    def __init__(self, view):
+        self.db = DatabaseManager()
+        self.db.connect()
+        self.media_repo = MediaRepository(self.db)
+        self.media_repo.sync_media()
+
+        self.view = view
+
+    def load_colors(self) -> None:
+        colors = self.db.get_all_colors()
+        print("Loaded colors:", colors)
+        self.view.color_list_widget.set_colors(colors)