fix: break static circular dep in notify.js that caused 'Failed to fetch' after ui split

notify.js statically imported navigate from views/views.js, creating a new
circular chain: navigation.js → ui/ui.js → settings.js → downloads.js →
notify.js → views/views.js → navigation.js. This chain did not exist in the
old monolithic ui.js and caused module initialisation failures in some browsers.

Fix: make navigate a lazy dynamic import inside _notifNavigate() body, which
is the only call site. Also replace unnecessary dynamic import('../utils.js')
calls with the already-statically-imported toast function.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/ui/notify.js

@@ -1,6 +1,4 @@
-import { esc } from '../utils.js';
-// Circular — safe (only used inside function bodies)
-import { navigate } from '../views/views.js';
+import { esc, toast } from '../utils.js';
 import { api } from '../api.js';
 
 const _NOTIF_KEY = 'ns_notifications';
@@ -108,6 +106,8 @@ export async function _notifNavigate(notifId) {
   panel?.classList.remove('open');
   overlay?.classList.remove('active');
 
+  const { navigate } = await import('../views/views.js');
+
   if (n.navType === 'playlist' && n.navId) {
     navigate('playlist-detail', { id: n.navId, name: n.navName || n.title.replace(/^Playlist:\s*/, '') });
     return;
@@ -130,7 +130,7 @@ export async function _notifNavigate(notifId) {
         }
       } catch {}
     }
-    import('../utils.js').then(m => m.toast('Album nicht gefunden — Library-Scan nötig?'));
+    toast('Album nicht gefunden — Library-Scan nötig?');
     return;
   }
 
@@ -141,6 +141,6 @@ export async function _notifNavigate(notifId) {
       const match = artists.find(a => norm(a.name) === norm(n.navArtist)) || artists[0];
       if (match) { navigate('artist-detail', { id: match.id, name: match.name }); return; }
     } catch {}
-    import('../utils.js').then(m => m.toast('Künstler nicht gefunden — Library-Scan nötig?'));
+    toast('Künstler nicht gefunden — Library-Scan nötig?');
   }
 }