fix: transport shortcuts work in Player mode via runTransportAction fallback

Co-authored-by: Cursor <cursoragent@cursor.com>

src/App.svelte

@@ -13,11 +13,16 @@
   import PlayerControls from '$lib/components/PlayerControls.svelte';
   import PlayerTimeline from '$lib/components/PlayerTimeline.svelte';
   import { loadPreferences, preferences, setClipListPosition, setClipListWidth, setAppMode } from '$lib/stores/preferences.svelte';
-  import { getSelectedClipId, removeClip } from '$lib/stores/clips.svelte';
+  import { getSelectedClipId, removeClip, markInPoint, markOutPoint } from '$lib/stores/clips.svelte';
-  import { adjustShuttle, resetShuttleRate, toggleFullscreen } from '$lib/transport/playback';
+  import {
+    adjustShuttle,
+    resetShuttleRate,
+    toggleFullscreen,
+    runTransportAction,
+    type TransportKeyAction,
+  } from '$lib/transport/playback';
   import { session } from '$lib/stores/videoSession.svelte';
   import { listen } from '@tauri-apps/api/event';
-  import type { TransportKeyAction } from '$lib/transport/playback';
 
   let showSetupWizard = $state(true);
   let showPreferences = $state(false);
@@ -90,7 +95,11 @@
   });
 
   function dispatchTransport(action: TransportKeyAction) {
-    transportControls?.handleKeyAction(action);
+    if (transportControls) {
+      transportControls.handleKeyAction(action);
+    } else {
+      runTransportAction(action, markInPoint, markOutPoint);
+    }
   }
 
   function handleResizeStart(e: MouseEvent) {