feat: GIF search (Klipy), stickers, emoji picker, and bug fixes

- Add GIF search powered by Klipy API with correct response mapping
  (file.sm/hd tiers, not flat files structure)
- Add sticker system: packs, upload with auto-downscale, send in messages
- Add tabbed InputPopover with emoji, GIF, and sticker pickers
- Fix GIF API key migration race condition (column-add loop vs rename)
- Fix masked API key corruption on settings save (server + client guards)
- Fix sticker packs 403 (reversed isMember parameter order)
- Fix emoji picker not filling popover width (perLine 8→9, CSS 100%)
- Add error logging for Klipy API failures

packages/web/src/hooks/useWebSocket.ts

@@ -96,6 +96,7 @@ function handleEvent(origin: string, event: ServerEvent): void {
         setUser(event.user);
         useSettingsStore.getState().setIsAdmin(event.user.isAdmin ?? false);
         useSettingsStore.getState().fetchStreamingLimits();
+        useSettingsStore.getState().fetchGifEnabled();
       }
 
       // Normalize asset URLs for remote origins before dispatching to stores
@@ -754,6 +755,20 @@ function handleEvent(origin: string, event: ServerEvent): void {
       break;
     }
 
+    // ─── Sticker events (all origins) ────────────────────────────────────
+
+    case 'sticker_pack_created':
+    case 'sticker_pack_updated':
+    case 'sticker_pack_deleted':
+    case 'sticker_created':
+    case 'sticker_deleted': {
+      // Invalidate the sticker picker cache so next open fetches fresh data
+      import('../components/chat/StickerPicker').then(({ invalidateStickerCache }) => {
+        invalidateStickerCache();
+      });
+      break;
+    }
+
     case 'pong':
       break;