feat: enhance settings pages with save functionality and UI improvements

- Added save functionality with toast notifications in NotificationSettings.vue and PlayerSettings.vue.
- Improved layout and styling in NotificationSettings.vue and PlayerSettings.vue for better user experience.
- Refactored PlayerSettings.vue to use a dynamic settingsItems array for rendering toggle switches.
- Updated SecurityNConnected.vue to enhance security settings UI, including two-factor authentication and connected accounts management.
- Introduced dialogs for changing passwords and enabling two-factor authentication with improved UX.
- Added scrollbar-gutter CSS property to prevent layout shifts when dialogs open in uno.config.ts.

.claude/settings.local.json

@@ -1,7 +1,8 @@
 {
   "permissions": {
     "allow": [
-      "Bash(bun run build)"
+      "Bash(bun run build)",
+      "mcp__ide__getDiagnostics"
     ]
   }
 }