fix(sources): gracefully handle desktopCapturer.getSources failure

Catch errors from desktopCapturer.getSources() in the get-sources IPC
handler and return an empty array instead of crashing the handler.
Prevents repeated 'Failed to get sources' errors when screen recording
permission is not granted (common in dev mode on macOS 26).

electron/ipc/handlers.ts

@@ -2815,6 +2815,9 @@ export function registerIpcHandlers(
       ? await desktopCapturer.getSources({
           ...opts,
           types: electronTypes,
+        }).catch((error) => {
+          console.warn('desktopCapturer.getSources failed (screen recording permission may be missing):', error)
+          return []
         })
       : []
     const ownWindowNames = new Set(