Fix Stop + broken buttons: use location.reload() which preserves hash but fully unloads page, killing workers and audio. Revert pathname routing (unnecessary).

frontend/src/pages/Play.svelte

@@ -65,9 +65,10 @@
   }
 
   function stopEmulator() {
-    // Navigate to an actual server path to force full page unload
-    // which kills Web Workers, AudioContexts, and WASM threads
-    window.location.href = `/game/${game.id}`;
+    // Force full page reload which terminates all workers, AudioContexts
+    // and WASM threads. Hash is preserved so the SPA routes correctly.
+    window.location.hash = `#/game/${game.id}`;
+    window.location.reload();
   }
 
   $effect(() => { load(); });