首页和个人中心优化：去掉通知/查询按钮，个人图标改客服，移除未开发菜单项

flutter_monisuo/lib/ui/pages/mine/components/menu_group1.dart

@@ -53,21 +53,6 @@ class MenuGroup1 extends StatelessWidget {
               }
             },
           ),
-          const Divider(height: 1),
-          MenuRow(
-            icon: LucideIcons.lock,
-            iconColor: colorScheme.onSurfaceVariant,
-            title: '安全設置',
-            onTap: () => onShowComingSoon('安全設置'),
-          ),
-          const Divider(height: 1),
-          MenuRow(
-            icon: LucideIcons.bell,
-            iconColor: colorScheme.onSurfaceVariant,
-            title: '消息通知',
-            trailing: const RedDotIndicator(),
-            onTap: () => onShowComingSoon('消息通知'),
-          ),
         ],
       ),
     );

flutter_monisuo/lib/ui/pages/mine/components/menu_group2.dart

@@ -20,16 +20,6 @@ class MenuGroup2 extends StatelessWidget {
           // 深色模式
           const DarkModeRow(),
           const Divider(height: 1),
-          // 系統設置
-          MenuRow(
-            icon: LucideIcons.settings,
-            iconColor: colorScheme.onSurfaceVariant,
-            title: '系統設置',
-            onTap: () {
-              // TODO: 系統設置
-            },
-          ),
-          const Divider(height: 1),
           // 關於我們
           MenuRow(
             icon: LucideIcons.info,