fix: fall back to web keybind listeners when Electron lacks keybind APIs

When running in Electron but the desktop app hasn't been rebuilt with
keybind support (no syncKeybinds/onKeybindAction in preload), the hook
now falls through to the web capture-phase listener instead of silently
doing nothing. This ensures keybinds work immediately on the web-served
UI regardless of the desktop app version.

packages/web/src/hooks/useKeybinds.ts

@@ -198,12 +198,15 @@ export function useKeybinds(): void {
     }
   }, [keybinds, currentVoiceChannelId]);
 
-  // --- Electron: IPC bridge ---
+  // --- Keybind listeners (Electron IPC or web capture-phase fallback) ---
   useEffect(() => {
-    if (!isElectron()) return;
-    const api = window.backspace;
-    if (!api?.syncKeybinds || !api?.onKeybindAction) return;
+    if (keybinds.length === 0) return;
 
+    // Try Electron IPC bridge first (requires rebuilt desktop app with keybind support)
+    if (isElectron()) {
+      const api = window.backspace;
+      if (api?.syncKeybinds && api?.onKeybindAction) {
+        // Desktop app has keybind support — use OS-level global shortcuts
         api.syncKeybinds(keybinds.map((kb) => ({
           actionId: kb.actionId,
           keys: kb.keys,
@@ -215,13 +218,11 @@ export function useKeybinds(): void {
         });
 
         return cleanup;
-  }, [keybinds]);
-
-  // --- Web fallback: capture-phase listeners ---
-  useEffect(() => {
-    if (isElectron()) return;
-    if (keybinds.length === 0) return;
+      }
+      // Desktop app lacks keybind APIs (old build) — fall through to web fallback
+    }
 
+    // Web fallback: capture-phase listeners (works when tab/window is focused)
     const cleanup = setupWebFallback(keybindsRef);
     return cleanup ?? undefined;
   }, [keybinds]);