fix: 3 bug standalone — soundfont preview/play, Carla bridge play item, realtime sync LAN/Tauri

Bug1: dispatcher CREATE_MIDI_ITEM track_id number vs state string -> String(); play+preview native soundfont verified.
Bug2: Carla play item — chờ OSC ready (poll carla-status, queue nốt khi cold start), chống spawn trùng (carla-status dò port bind, open-in-carla skip khi đã chạy).
Bug3: realtime sync — GET /temp/revision (updated_at+client_id), poll 3s, apply qua deserializeProjectFromSchema; hash-skip autosave + client_id chống ping-pong.

app/templates/index.html

@@ -46,7 +46,7 @@
     <script src="/static/js/services/midiExtractor.js?v=202607281052"></script>
     <script src="/static/js/services/promptTemplateManager.js?v=202607281039"></script>
     <script src="/static/js/services/undoRedoEngine.js?v=202607290941"></script>
-    <script src="/static/js/app.precompiled.js?v=202608102044" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608102202" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {