✨ feat: add global start page setting across all apps

- Add GeneralSettings types (startPages, weekStartsOn, soundsEnabled)
- Create app-routes.ts with available routes for 12 apps
- Extend UserSettingsStore with general settings support
- Update GlobalSettingsSection with start page selector UI
- Add start page redirect logic to all app layouts:
  - Clock, Calendar, Todo, Zitare, Picture
  - Manadeck, Presi, Chat, Manacore
- Create user-settings stores for Clock and Todo apps

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

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

apps/zitare/apps/web/src/routes/+layout.svelte

@@ -145,6 +145,12 @@
 		// Load user settings if authenticated
 		if (authStore.isAuthenticated) {
 			await userSettings.load();
+
+			// Redirect to start page if on root and a custom start page is set
+			const currentPath = window.location.pathname;
+			if (currentPath === '/' && userSettings.startPage && userSettings.startPage !== '/') {
+				goto(userSettings.startPage, { replaceState: true });
+			}
 		}
 
 		// Initialize sidebar mode from localStorage