fix: clear album cache on admin save so changes appear immediately

When saving gallery/settings via admin, the config cache was invalidated
but the Immich album cache (which stores resolved title overrides and
descriptions) was not cleared. This meant changes only appeared after
the TTL expired or a manual 'Reload' click.

Now both gallery and settings saves also call immich.invalidateAll()
to flush the album cache, making changes visible on next page load.

lib/immich.ts

@@ -434,7 +434,8 @@ class ImmichClient {
    */
   invalidateAll(): void {
     cache.clear();
-    console.log('[Immich] 🔄 Full cache cleared via webhook');
+    this.hasLoggedAlbums = false;
+    console.log('[Immich] 🔄 Full cache cleared');
   }
 
   /**