feat: Add category deletion functionality and enhance category dialog for editing

lib/widgets/menu_drawer.dart

@@ -8,12 +8,14 @@ class MenuDrawer extends StatelessWidget {
     this.selectedItem,
     this.categories = const [],
     this.onCreateCategory,
+    this.onEditCategory,
   });
 
   final ValueChanged<String>? onMenuItemTapped;
   final String? selectedItem;
   final List<Category> categories;
   final VoidCallback? onCreateCategory;
+  final ValueChanged<Category>? onEditCategory;
 
   @override
   Widget build(BuildContext context) {
@@ -57,6 +59,15 @@ class MenuDrawer extends StatelessWidget {
                             onTap: () => onMenuItemTapped?.call(categoryId),
                             iconColor: Color(category.colorValue ?? 0xFFFFC107),
                             textColor: Color(category.colorValue ?? 0xFFFFC107),
+                            trailing: selectedItem == categoryId
+                                ? IconButton(
+                                    icon: const Icon(
+                                      Icons.more_vert,
+                                      color: Colors.white70,
+                                    ),
+                                    onPressed: () => onEditCategory?.call(category),
+                                  )
+                                : null,
                           );
                         }).toList(),
                       ),
@@ -99,6 +110,7 @@ class _MenuItemTile extends StatelessWidget {
     this.onTap,
     this.iconColor,
     this.textColor,
+    this.trailing,
   });
 
   final IconData icon;
@@ -107,6 +119,7 @@ class _MenuItemTile extends StatelessWidget {
   final VoidCallback? onTap;
   final Color? iconColor;
   final Color? textColor;
+  final Widget? trailing;
 
   @override
   Widget build(BuildContext context) {
@@ -134,6 +147,7 @@ class _MenuItemTile extends StatelessWidget {
       ),
       child: ListTile(
         leading: Icon(icon, color: iconColor ?? foregroundColor),
+        trailing: trailing,
         title: Text(
           label,
           style: TextStyle(color: textColor ?? foregroundColor, fontSize: 14),