feat: implement settings migration from localStorage to server

- Added logic to perform settings migration, merging localStorage data with server settings if necessary.
- Introduced `localStorageMigrated` flag to prevent re-migration on subsequent app loads.
- Updated `useSettingsMigration` hook to handle migration and hydration of settings.
- Ensured localStorage values are preserved post-migration for user flexibility.
- Enhanced documentation within the migration logic for clarity.

libs/types/src/settings.ts

@@ -387,6 +387,10 @@ export interface GlobalSettings {
   /** Version number for schema migration */
   version: number;
 
+  // Migration Tracking
+  /** Whether localStorage settings have been migrated to API storage (prevents re-migration) */
+  localStorageMigrated?: boolean;
+
   // Onboarding / Setup Wizard
   /** Whether the initial setup wizard has been completed */
   setupComplete: boolean;