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/models/category.dart

@@ -2,32 +2,36 @@ import 'package:uuid/uuid.dart';
 
 class Category {
   Category({
-    String? uuid,
-    required this.encryptedName,
+    String? id,
+    required this.name,
     this.serverVersion = 0,
     this.isDeleted = false,
     required this.updatedAt,
-  }) : uuid = uuid ?? Uuid().v4();
+    this.isDirty = true,
+  }) : id = id ?? Uuid().v4();
 
-  final String uuid;
-  final String encryptedName;
+  final String id;
+  final String name;
   final int serverVersion;
   final bool isDeleted;
   final DateTime updatedAt;
+  final bool isDirty;
 
   Category copyWith({
-    String? uuid,
-    String? encryptedName,
+    String? id,
+    String? name,
     int? serverVersion,
     bool? isDeleted,
     DateTime? updatedAt,
+    bool? isDirty,
   }) {
     return Category(
-      uuid: uuid ?? this.uuid,
-      encryptedName: encryptedName ?? this.encryptedName,
+      id: id ?? this.id,
+      name: name ?? this.name,
       serverVersion: serverVersion ?? this.serverVersion,
       isDeleted: isDeleted ?? this.isDeleted,
       updatedAt: updatedAt ?? this.updatedAt,
+      isDirty: isDirty ?? this.isDirty,
     );
   }
 
@@ -37,9 +41,9 @@ class Category {
       return true;
     }
 
-    return other is Category && uuid == other.uuid;
+    return other is Category && id == other.id;
   }
 
   @override
-  int get hashCode => uuid.hashCode;
+  int get hashCode => id.hashCode;
 }