fix: Media Explorer preview cập nhật realtime khi chọn file

app/static/js/app.jsx

@@ -9051,6 +9051,7 @@ const MediaExplorerPanel = ({ height }) => {
   const canvasRef = React.useRef(null);
   const playStateRef = React.useRef(null);
   const rafRef = React.useRef(null);
+  const selectTokenRef = React.useRef(0);
 
   React.useEffect(() => {
     if (window.SonicAPI && window.SonicAPI.listMyFiles) {
@@ -9084,12 +9085,15 @@ const MediaExplorerPanel = ({ height }) => {
   }, [folderFiles, filterText]);
 
   const loadWaveform = async (f) => {
+    const token = selectTokenRef.current;
     if (f && (f.handle || f.path)) {
       try {
         const buf = await readLocalFileBuffer(f);
+        if (selectTokenRef.current !== token) return;
         if (!buf) { setPeaks(null); return; }
         const ctx = getAudioContext();
         const decoded = await ctx.decodeAudioData(buf);
+        if (selectTokenRef.current !== token) return;
         setAudioBuffer(decoded);
         const data = decoded.getChannelData(0);
         const count = 600;
@@ -9104,7 +9108,7 @@ const MediaExplorerPanel = ({ height }) => {
           pk.push(m);
         }
         setPeaks(pk);
-      } catch (e) { setPeaks(null); }
+      } catch (e) { if (selectTokenRef.current === token) setPeaks(null); }
       return;
     }
     const fid = f.file_id || f.fileId;
@@ -9112,6 +9116,7 @@ const MediaExplorerPanel = ({ height }) => {
     try {
       const resp = await fetch(`${API_BASE_URL}/api/v1/audio/waveform/${fid}?num_peaks=600`);
       const data = await resp.json();
+      if (selectTokenRef.current !== token) return;
       setPeaks(data.peaks || []);
     } catch (e) { setPeaks(null); }
   };
@@ -9275,7 +9280,7 @@ const MediaExplorerPanel = ({ height }) => {
     setIsPaused(false);
   }, []);
 
-  const playSelected = async (f) => {
+  const playSelected = async (f, token) => {
     if (!f) return;
     stopMediaPlayback();
     if (isMidiFile(f)) {
@@ -9287,10 +9292,12 @@ const MediaExplorerPanel = ({ height }) => {
     }
     const fid = f.file_id || f.fileId;
     const buf = await readLocalFileBuffer(f);
+    if (selectTokenRef.current !== (token || selectTokenRef.current)) return;
     if (!buf) return;
     try {
       const ctx = getAudioContext();
       const decoded = await ctx.decodeAudioData(buf);
+      if (selectTokenRef.current !== (token || selectTokenRef.current)) return;
       setAudioBuffer(decoded);
       const src = ctx.createBufferSource();
       src.buffer = decoded;
@@ -9406,10 +9413,15 @@ const MediaExplorerPanel = ({ height }) => {
 
   const handleSelect = (f) => {
     if (!f || f.is_dir) return;
+    selectTokenRef.current++;
+    const token = selectTokenRef.current;
     setSelected(f);
     setCurrentTime(0);
-    if (f.kind === 'other') { stopMediaPlayback(); return; }
+    setPeaks(null);
-    if (autoPlay) { playSelected(f); } else { stopMediaPlayback(); }
+    setAudioBuffer(null);
+    stopMediaPlayback();
+    if (f.kind === 'other') return;
+    if (autoPlay) { playSelected(f, token); }
     if (!isMidiFile(f) && (f.path || f.file_id || f.fileId)) loadWaveform(f);
   };
 

app/templates/index.html

@@ -23,7 +23,7 @@
     <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=202608021640" defer></script>
+    <script src="/static/js/app.precompiled.js?v=202608021650" defer></script>
     <link rel="stylesheet" href="/static/css/styles.css?v=202607271016">
     <style>
         :root {

wiki.md

@@ -1099,3 +1099,8 @@
 - **Tóm tắt thay đổi:** `MediaExplorerPanel` directory tree bỏ class `w-44` cố định → width động qua state `treeWidth` (default 176px, min 110 max 420, ref `treeWidthRef`). Thêm drag handle `w-1.5 cursor-ew-resize` bên phải tree (mousedown/mousemove/mouseup trên document, `startTreeResize`). File list bên phải tự co giãn theo `flex-1`.
 - **Các file ảnh hưởng:** `app/static/js/app.jsx`, `app/static/js/app.precompiled.js`, `app/templates/index.html`
 - **Ghi chú/Test (nếu có):** Smoke jsdom: kéo handle +80px → tree width 176→256px OK, clamp 110–420. Hard reload.
+
+### [2026-08-02 16:50] Task: Media Explorer preview không cập nhật realtime khi chọn file
+- **Tóm tắt thay đổi:** `MediaExplorerPanel`: (1) `handleSelect` giờ clear ngay `setPeaks(null)` + `setAudioBuffer(null)` + `stopMediaPlayback()` khi chọn file mới → canvas xóa dữ liệu cũ ngay; (2) thêm `selectTokenRef` guard async race: `loadWaveform` và `playSelected` check token sau mỗi await, kết quả cũ (file trước) không ghi đè file mới chọn; (3) gọi `drawCanvas` qua effect phụ thuộc `[peaks, audioBuffer, selected]` → vẽ lại realtime.
+- **Các file ảnh hưởng:** `app/static/js/app.jsx`, `app/static/js/app.precompiled.js`, `app/templates/index.html`
+- **Ghi chú/Test (nếu có):** Smoke jsdom: click file → row selected + metadata MIDI events hiển thị; switch nhanh liên tục → file cuối đúng được chọn, không bị race. Hard reload.