feat(meetings): add renameMeeting; refresh the list after attach/rename

attachEvent and renameMeeting can both change a meeting's title now, so
both refresh the list (not just the selected-detail view) to keep the
sidebar in sync.

src/lib/stores/meetings.svelte.ts

@@ -224,7 +224,17 @@ class MeetingsStore {
   /** Link a recording to a calendar event (T6.3/T6.6, FR-CAL-2/4). */
   async attachEvent(id: MeetingId, eventId: string) {
     await api.attachMeetingToEvent(id, eventId);
+    // Attaching mirrors the event's subject onto the title server-side
+    // (FR-CAL-2) — refresh the list too, not just the detail view.
     if (this.selectedId === id) await this.select(id);
+    await this.load();
+  }
+
+  /** Manual rename (T2.2) — recordings otherwise default to "Untitled meeting". */
+  async renameMeeting(id: MeetingId, title: string) {
+    await api.renameMeeting(id, title);
+    if (this.selectedId === id) await this.select(id);
+    await this.load();
   }
 
   /** Free-text speaker rename (T4.4, FR-SPK-2) — the "add new name" escape