fix: address PR review comments

- Remove redundant case 'api-keys' from switch (handled by default)
- Improve type safety by using SettingsViewId in NavigationItem interface
- Simplify onCheckedChange callback in AudioSection
- Import NAV_ITEMS from config instead of duplicating locally
- Update SettingsNavigation props to use SettingsViewId type

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

apps/app/src/components/views/settings-view/config/navigation.ts

@@ -8,9 +8,10 @@ import {
   FlaskConical,
   Trash2,
 } from "lucide-react";
+import type { SettingsViewId } from "../hooks/use-settings-view";
 
 export interface NavigationItem {
-  id: string;
+  id: SettingsViewId;
   label: string;
   icon: LucideIcon;
 }