refactor: Update Note and Category models to use 'id' instead of 'uuid', and adjust related database operations

- Changed 'uuid' to 'id' in Note and Category models for consistency.
- Updated database operations in NoteRepository to reflect the new 'id' field.
- Modified sync models to accommodate changes in Note and Category structures.
- Adjusted the handling of notes and categories during synchronization.
- Refactored the note editor and home screen to use the new 'id' field.
- Ensured that the 'isDirty' flag is properly set and utilized across models.

lib/app.dart

@@ -753,14 +753,14 @@ class _NotesAppState extends State<NotesApp>
           }
         });
       }
-    } catch (e) {
+    } catch (e, st) {
       if (!mounted) {
         return;
       }
 
       setState(() {
         _syncStatus = SyncStatus.error;
-        _syncErrorMessage = e.toString();
+        _syncErrorMessage = '$e\n\nStackTrace: $st';
         _syncProgress = null;
         _syncDetailMessage = null;
       });