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From: 3dtours <yeunhiepanh.photo@gmail.com>
Date: Wed, 29 Jul 2026 22:03:20 +0700
Subject: [PATCH] =?UTF-8?q?FEAT:=20th=C3=AAm=20t=C3=ADnh=20n=C4=83ng=20Mas?=
 =?UTF-8?q?teringModules=20Modal?=
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---
 .../1785323991986-mastering-module-plan.md    | 197 ++++++
 app/static/js/app.jsx                         | 628 ++++++++++++++++++
 app/static/js/app.precompiled.js              |  15 +-
 app/storage/sonicforge.db                     | Bin 45056 -> 45056 bytes
 app/templates/index.html                      |  26 +
 5 files changed, 862 insertions(+), 4 deletions(-)
 create mode 100644 .kilo/plans/1785323991986-mastering-module-plan.md

diff --git a/.kilo/plans/1785323991986-mastering-module-plan.md b/.kilo/plans/1785323991986-mastering-module-plan.md
new file mode 100644
index 0000000..a872198
--- /dev/null
+++ b/.kilo/plans/1785323991986-mastering-module-plan.md
@@ -0,0 +1,197 @@
+# Implementation Plan: Ozone Mastering Module
+
+## Nguồn DUY NHẤT để tạo giao diện
+
+**Toàn bộ giao diện của Mastering Modal được lấy TRỰC TIẾP từ HTML trong `md/45_MASTERING_MODULE.md` dòng 74–885.**
+
+Không thiết kế giao diện mới. Không suy luận UI. Lấy chính xác:
+- **Cấu trúc HTML**: copy verbatim từ spec, chuyển sang JSX (className thay class, onChange thay onchange, v.v.)
+- **CSS styles**: copy verbatim từ spec (oz-panel, oz-card, oz-card-active, knob-dial, knob-pointer, gradient backgrounds)
+- **JavaScript logic**: port verbatim từ spec vào React hooks (useState thay ozState, useRef thay DOM refs, useEffect thay event listeners)
+- **Web Audio DSP graph**: copy y hệt node graph + connection từ spec (BiquadFilterNode, GainNode, DynamicsCompressorNode, AnalyserNode)
+- **Canvas renderers**: copy y hệt drawing logic từ spec (frequency grid, FFT fill, EQ curve, polar vectorscope, VU meter gradient)
+
+## Goal
+Dịch spec HTML `md/45_MASTERING_MODULE.md` (lines 74–885) thành `MasteringModal` React component trong `app.jsx`.
+
+## Ánh xạ HTML → React (chi tiết từ spec)
+
+### HTML lines 74–118: Dependencies & Styles
+
+| Spec | Action |
+|------|--------|
+| `<script src="cdn.tailwindcss.com">` | Đã có trong `index.html:9` |
+| `<link FA 6.4.0>` | Đã có trong `index.html:10` (dùng lucide thay FA, giữ nguyên) |
+| `<link Google Fonts Inter>` | Đã có font-family trong `index.html` style |
+| CSS `.oz-panel` `oz-card` `oz-card-active` `knob-*` scrollbar | Thêm vào `index.html` `<style>` block |
+| CSS `.font-mono { JetBrains Mono }` | Thêm vào `index.html` `<style>` |
+
+**→ Sửa `app/templates/index.html`**: append ~30 dòng CSS class (oz-panel, oz-card, knob-dial, scrollbar tối)
+
+---
+
+### HTML lines 121–161: Header Bar
+
+| Spec Element | React JSX Mapping |
+|---|---|
+| Logo `.fa-atom` + "OZONE ADVANCED" | `<div>` với cùng class & lucide icon `wand-2` thay FA |
+| Play/Stop buttons + preset select | JSX nguyên bản, class giữ nguyên |
+| Target LUFS text | JSX nguyên bản |
+
+**→ Trong `MasteringModal` return JSX**, copy verbatim HTML, chỉ thay `.fa-*` → lucide `i` tương ứng.
+
+---
+
+### HTML lines 163–213: Module Chain Strip
+
+| Spec Element | React |
+|---|---|
+| `#cardDynamicEq` + power toggle + icon | JSX với `onClick` → set activeModule('eq') |
+| `#cardImager` + power toggle + icon | JSX với `onClick` → set activeModule('imager') |
+| `#cardMaximizer` + power toggle + icon | JSX với `onClick` → set activeModule('maximizer') |
+| Empty add-module slot `.border-dashed` | JSX verbatim |
+| `oz-card-active` class toggle | `className={\`oz-card ${ozState.activeModule==='eq' ? 'oz-card-active' : ''}\`}` |
+
+---
+
+### HTML lines 216–325: Dynamic EQ View
+
+| Spec Element | React |
+|---|---|
+| `#viewDynamicEq` container | `className={ozState.activeModule === 'eq' ? '' : 'hidden'}` |
+| `#eqCanvas` | `<canvas ref={el => canvasRefs.current.eq = el}>` |
+| 4-band knobs (Low/Mid1/Mid2/High) | Mỗi band là `<div>` với `.knob-container`, `data-param`, pointer events |
+| Knob dial HTML `.knob-dial > .knob-pointer` | JSX verbatim + inline `transform: rotate(Xdeg)` |
+| Band labels & freq text | JSX verbatim |
+
+**Knob interaction (spec lines 794–843)**: port pointerdown/move/up logic vào `useEffect` với `.knob-container` querySelectorAll, update `ozState[param]` + gọi `updateAudioGraphValues`.
+
+---
+
+### HTML lines 327–363: Stereo Imager View
+
+| Spec Element | React |
+|---|---|
+| `#viewImager` | `className={ozState.activeModule === 'imager' ? '' : 'hidden'}` |
+| `#imagerCanvas` (polar vectorscope) | `<canvas ref={...}>` |
+| 4-band width sliders `#w1Slider`–`#w4Slider` | `<input type="range" value={ozState.w1} onChange={...}>` |
+| Value spans `#w1Val`–`#w4Val` | `<span>{ozState.w1}%</span>` |
+
+---
+
+### HTML lines 366–421: Maximizer View
+
+| Spec Element | React |
+|---|---|
+| `#viewMaximizer` | `className={ozState.activeModule === 'maximizer' ? '' : 'hidden'}` |
+| Maximizer gain knob (`.knob-dial w-24 h-24`) | JSX verbatim, pointer events |
+| Ceiling level text | `<span>{ozState.ceiling.toFixed(2)} dB</span>` |
+| Upward compress knob | JSX verbatim + pointer events |
+| Soft clipper knob | JSX verbatim + pointer events |
+| Transient emphasis knob | JSX verbatim + pointer events |
+
+---
+
+### HTML lines 425–480: Right Sidebar (I/O Meters + Utilities)
+
+| Spec Element | React |
+|---|---|
+| `#inPeakText` / `#outPeakText` | `<span>{inPeak.toFixed(1)} dB</span>` etc. |
+| `#inMeterCanvas` / `#outMeterCanvas` | `<canvas ref={...}>` |
+| Bypass / Gain Match / Codec / Dither buttons | JSX verbatim |
+| Module active state checkboxes (power toggles) | Thêm `onClick` set `ozState.eqActive` etc. + gọi `updateAudioGraphValues` |
+
+---
+
+### HTML lines 484–585: Audio Engine (JavaScript → React)
+
+| Spec Function | React Mapping |
+|---|---|
+| `ozState` object | `const [ozState, setOzState] = useState({...})` — values copy verbatim |
+| `initOzoneAudioEngine()` | `useEffect` on mount: tạo AudioContext (dùng `window.SonicAudio?.getAudioContext()` nếu có), tạo AnalyserNode (fftSize=2048), BiquadFilter nodes (lowshelf 100Hz, peaking 822Hz Q0.7, peaking 3.2kHz Q1.2, highshelf 10kHz), GainNode boost, DynamicsCompressorNode (threshold -0.1, knee 0, ratio 20, attack 0.001, release 0.05), outputAnalyser |
+| Node graph connection | `inputAnalyser → eqLow → eqMid1 → eqMid2 → eqHigh → boostGain → compressor → outputAnalyser → destination` |
+| `updateAudioGraphValues()` | Copy verbatim logic: `eqLowFilter.gain.setTargetAtTime(ozState.eqActive ? ozState.eqLowGain : 0, now, 0.01)` etc. |
+| `startAudioDemo()` | Copy verbatim: create 4-second stereo buffer, kick/snare/synth oscillator, loop playback |
+| `stopAudioDemo()` | Copy verbatim: `sourceNode.stop(); sourceNode.disconnect();` |
+
+---
+
+### HTML lines 586–791: Canvas Renderers (JavaScript → React)
+
+| Spec Canvas | React Mapping |
+|---|---|
+| `eqCanvas` (lines 680–738) | `useEffect` với `requestAnimationFrame` loop: draw freq grid lines, FFT spectrum bar fill từ `outputAnalyser.getByteFrequencyData`, draw composite EQ curve |
+| `imagerCanvas` (lines 742–765) | `requestAnimationFrame`: draw polar circle guides + random scatter dots with `ozState.w3` width |
+| `inMeterCanvas`/`outMeterCanvas` (lines 769–787) | `requestAnimationFrame`: `renderMeterBar()` with linear gradient green→yellow→red, dBFS numeric readout |
+| `resizeAll()` | `useEffect` + `window.addEventListener('resize', resizeAll)` |
+
+---
+
+### HTML lines 793–882: Interactions & Init (JavaScript → React)
+
+| Spec | React |
+|---|---|
+| `setupKnobs()` (lines 794–843) | `useEffect` on mount: query `.knob-container`, attach pointerdown/move/up, update UI rotation + `ozState` + `updateAudioGraphValues` |
+| `setupModuleNavigation()` (lines 846–868) | Inline JSX click handlers thay vì event listeners |
+| `window.addEventListener('load', ...)` (lines 871–882) | `useEffect` on mount: init audio engine, setup event handlers, start canvas renderers |
+
+---
+
+## Task List
+
+### Task 1: Append CSS classes vào app/templates/index.html
+Thêm ~30 dòng CSS vào `<style>` block (`index.html:28-245`):
+- `.oz-panel` `oz-card` `oz-card-active`
+- `.knob-container` `.knob-dial` `.knob-pointer`
+- Scrollbar dark theme
+- `.font-mono` JetBrains Mono override
+- Gradient panel backgrounds
+
+### Task 2: Thêm state + menu item trong app.jsx
+- `showMasteringModal` state (dòng 7708)
+- Menu item "Mastering Suite" (dòng 15585)
+- Render `MasteringModal` (dòng 18664)
+
+### Task 3: Viết MasteringModal component trong app.jsx (trước dòng 6694)
+~500 dòng gồm:
+
+**3a. State**: `ozState` (activeModule, gains, widths, maximizer params), `isPlaying`, `canvasRefs`, `audioRefs`
+
+**3b. useEffect (mount)**: `initOzoneAudioEngine()` — copy verbatim từ spec lines 529-584, dùng `window.SonicAudio?.getAudioContext()` fallback
+
+**3c. useEffect (mount)**: `setupKnobs()` — port pointer events từ spec lines 794-843, gọi `updateAudioGraphValues()` khi giá trị thay đổi
+
+**3d. useEffect (mount + deps)**: Canvas render loop — port `startCanvasRenderers()` từ spec lines 650-791, sử dụng `ozState` thay vì global
+
+**3e. useEffect (cleanup)**: Stop audio + disconnect nodes khi unmount
+
+**3f. JSX return**: ~250 dòng JSX, dịch sát spec HTML lines 121-480:
+- Overlay modal container `fixed inset-0 z-[100] bg-black/60 backdrop-blur-sm`
+- Bên trong: `flex flex-col` container với `h-[90vh] w-[90vw] max-w-[1400px]`
+- Header bar (logo, transport, preset select, LUFS)
+- Module chain strip (3 module cards + add slot, `oz-card-active` toggle)
+- Main workspace:
+  - Sub toolbar (Delta listen, IRC mode select, Learn Input Gain)
+  - `viewDynamicEq` (EQ canvas + 4-band knob panel, show khi `activeModule==='eq'`)
+  - `viewImager` (vectorscope canvas + 4-band sliders, show khi `activeModule==='imager'`)
+  - `viewMaximizer` (gain knob, upward comp, soft clip, transient knobs, show khi `activeModule==='maximizer'`)
+- Right sidebar I/O meters (in/out peak text, meter canvases, bypass/gain match/codec/dither buttons)
+- Close button (góc trên phải)
+
+### Task 4: Build & Verify
+```bash
+npm run build
+```
+Kiểm tra: mở app → menu → "Mastering Suite" → modal hiển thị, Play Reference Loop phát âm thanh, canvas vẽ, knobs kéo được.
+
+## Files Affected
+| File | Lines | Change |
+|------|-------|--------|
+| `app/templates/index.html` | +30 | Thêm CSS classes (oz-panel, oz-card, knob-dial, scrollbar) |
+| `app/static/js/app.jsx` | ~dòng 6690 + 7708 + 15585 + 18664 | Thêm MasteringModal component + state + menu item + render |
+
+## Skipped (PONYTALL)
+- Real M/S processing: phase 1 chỉ UI + vectorscope viz. Thêm actual M/S khi user upload file stereo thật.
+- Delta Listen / Gain Match / Codec / Dither: UI button renders, DSP stubbed. Thêm sau.
+- Drag-drop module reorder: spec define UX. Phase 1: fixed chain.
+- Preset save/load: UI dropdown + defaults. Backend integration sau.
diff --git a/app/static/js/app.jsx b/app/static/js/app.jsx
index 02b1adc..721d30f 100644
--- a/app/static/js/app.jsx
+++ b/app/static/js/app.jsx
@@ -6691,6 +6691,625 @@ const deserializeProjectFromSchema = (schemaObj) => {
   };
 };
 
+// ──────────────────────────────────────────────
+// MASTERING MODAL COMPONENT (from md/45_MASTERING_MODULE.md)
+// ──────────────────────────────────────────────
+const MasteringModal = ({ isOpen, onClose }) => {
+  const [ozState, setOzState] = React.useState({
+    activeModule: 'eq',
+    eqActive: true, imagerActive: true, maximizerActive: true,
+    eqLowGain: 1.5, eqMid1Gain: -1.0, eqMid2Gain: 2.0, eqHighGain: 1.8,
+    w1: 0, w2: 15, w3: 35, w4: 50,
+    maxGain: 5.4, maxUpward: 2.0, maxSoftClip: 15, maxTransient: 25, ceiling: -0.1, isBypassed: false
+  });
+  const [isPlaying, setIsPlaying] = React.useState(false);
+  const [peakLevels, setPeakLevels] = React.useState({ inPeak: 0.05, outPeak: 0.05 });
+
+  const audioRef = React.useRef({ ctx: null, nodes: {}, source: null });
+  const eqCanvasRef = React.useRef(null);
+  const imagerCanvasRef = React.useRef(null);
+  const inMeterCanvasRef = React.useRef(null);
+  const outMeterCanvasRef = React.useRef(null);
+  const animFrameRef = React.useRef(null);
+  const knobsInitializedRef = React.useRef(false);
+
+  const ozStateRef = React.useRef(ozState);
+  ozStateRef.current = ozState;
+
+  function getAudioCtx() {
+    if (audioRef.current.ctx) return audioRef.current.ctx;
+    const ctx = (window.SonicAudio && window.SonicAudio.getAudioContext && window.SonicAudio.getAudioContext()) || new (window.AudioContext || window.webkitAudioContext)();
+    audioRef.current.ctx = ctx;
+    return ctx;
+  }
+
+  function initOzoneAudioEngine() {
+    const ctx = getAudioCtx();
+    const n = audioRef.current.nodes;
+    if (n.inputAnalyser) return;
+
+    n.inputAnalyser = ctx.createAnalyser();
+    n.inputAnalyser.fftSize = 2048;
+
+    n.eqLowFilter = ctx.createBiquadFilter();
+    n.eqLowFilter.type = 'lowshelf';
+    n.eqLowFilter.frequency.value = 100;
+
+    n.eqMid1Filter = ctx.createBiquadFilter();
+    n.eqMid1Filter.type = 'peaking';
+    n.eqMid1Filter.frequency.value = 822;
+    n.eqMid1Filter.Q.value = 0.7;
+
+    n.eqMid2Filter = ctx.createBiquadFilter();
+    n.eqMid2Filter.type = 'peaking';
+    n.eqMid2Filter.frequency.value = 3200;
+    n.eqMid2Filter.Q.value = 1.2;
+
+    n.eqHighFilter = ctx.createBiquadFilter();
+    n.eqHighFilter.type = 'highshelf';
+    n.eqHighFilter.frequency.value = 10000;
+
+    n.maximizerBoostGain = ctx.createGain();
+    n.maximizerCompressor = ctx.createDynamicsCompressor();
+    n.maximizerCompressor.threshold.value = -0.1;
+    n.maximizerCompressor.knee.value = 0.0;
+    n.maximizerCompressor.ratio.value = 20.0;
+    n.maximizerCompressor.attack.value = 0.001;
+    n.maximizerCompressor.release.value = 0.05;
+
+    n.outputAnalyser = ctx.createAnalyser();
+    n.outputAnalyser.fftSize = 2048;
+
+    n.inputAnalyser.connect(n.eqLowFilter);
+    n.eqLowFilter.connect(n.eqMid1Filter);
+    n.eqMid1Filter.connect(n.eqMid2Filter);
+    n.eqMid2Filter.connect(n.eqHighFilter);
+    n.eqHighFilter.connect(n.maximizerBoostGain);
+    n.maximizerBoostGain.connect(n.maximizerCompressor);
+    n.maximizerCompressor.connect(n.outputAnalyser);
+    n.outputAnalyser.connect(ctx.destination);
+
+    updateAudioGraphValues();
+  }
+
+  function updateAudioGraphValues() {
+    const n = audioRef.current.nodes;
+    if (!n.eqLowFilter) return;
+    const s = ozStateRef.current;
+    const now = audioRef.current.ctx.currentTime;
+    n.eqLowFilter.gain.setTargetAtTime(s.eqActive ? s.eqLowGain : 0, now, 0.01);
+    n.eqMid1Filter.gain.setTargetAtTime(s.eqActive ? s.eqMid1Gain : 0, now, 0.01);
+    n.eqMid2Filter.gain.setTargetAtTime(s.eqActive ? s.eqMid2Gain : 0, now, 0.01);
+    n.eqHighFilter.gain.setTargetAtTime(s.eqActive ? s.eqHighGain : 0, now, 0.01);
+    const boostLinear = s.maximizerActive ? Math.pow(10, s.maxGain / 20) : 1.0;
+    n.maximizerBoostGain.gain.setTargetAtTime(boostLinear, now, 0.01);
+  }
+
+  function startAudioDemo() {
+    initOzoneAudioEngine();
+    const ctx = audioRef.current.ctx;
+    if (ctx.state === 'suspended') ctx.resume();
+    stopAudioDemo();
+
+    const sampleRate = ctx.sampleRate;
+    const bufferSize = sampleRate * 4;
+    const buffer = ctx.createBuffer(2, bufferSize, sampleRate);
+    const left = buffer.getChannelData(0);
+    const right = buffer.getChannelData(1);
+
+    for (let i = 0; i < bufferSize; i++) {
+      const t = i / sampleRate;
+      const kickEnv = Math.max(0, 1 - (t % 0.5) * 8);
+      const kick = Math.sin(2 * Math.PI * (55 * Math.exp(-(t % 0.5) * 18))) * kickEnv;
+      const snareEnv = Math.max(0, 1 - ((t + 0.25) % 0.5) * 6);
+      const snare = (Math.random() * 2 - 1) * snareEnv * 0.3;
+      const synth = (Math.sin(2 * Math.PI * 261.63 * t) + Math.sin(2 * Math.PI * 311.13 * t) + Math.sin(2 * Math.PI * 392.0 * t)) * 0.12;
+      left[i] = kick * 0.6 + snare + synth;
+      right[i] = kick * 0.6 + snare * 0.9 + synth * 0.95;
+    }
+
+    const source = ctx.createBufferSource();
+    source.buffer = buffer;
+    source.loop = true;
+    source.connect(audioRef.current.nodes.inputAnalyser);
+    source.start();
+    audioRef.current.source = source;
+    setIsPlaying(true);
+  }
+
+  function stopAudioDemo() {
+    const src = audioRef.current.source;
+    if (src) {
+      try { src.stop(); } catch(e) {}
+      try { src.disconnect(); } catch(e) {}
+      audioRef.current.source = null;
+    }
+    setIsPlaying(false);
+  }
+
+  React.useEffect(() => {
+    if (!isOpen) return;
+    initOzoneAudioEngine();
+    const n = audioRef.current.nodes;
+    const eqCtxFn = () => {
+      const c = eqCanvasRef.current;
+      return c ? c.getContext('2d') : null;
+    };
+    const imagerCtxFn = () => {
+      const c = imagerCanvasRef.current;
+      return c ? c.getContext('2d') : null;
+    };
+    const inCtxFn = () => {
+      const c = inMeterCanvasRef.current;
+      return c ? c.getContext('2d') : null;
+    };
+    const outCtxFn = () => {
+      const c = outMeterCanvasRef.current;
+      return c ? c.getContext('2d') : null;
+    };
+
+    function resizeAll() {
+      const resizeCanvas = (ref) => {
+        const el = ref.current;
+        if (el) { el.width = el.clientWidth; el.height = el.clientHeight; }
+      };
+      resizeCanvas(eqCanvasRef);
+      resizeCanvas(imagerCanvasRef);
+      resizeCanvas(inMeterCanvasRef);
+      resizeCanvas(outMeterCanvasRef);
+    }
+    resizeAll();
+    window.addEventListener('resize', resizeAll);
+
+    const fftData = new Uint8Array(1024);
+
+    function renderFrame() {
+      animFrameRef.current = requestAnimationFrame(renderFrame);
+      const s = ozStateRef.current;
+
+      // EQ Spectrum
+      const eqCanvas = eqCanvasRef.current;
+      if (eqCanvas) {
+        const w = eqCanvas.width, h = eqCanvas.height;
+        const eqCtx = eqCanvas.getContext('2d');
+        eqCtx.clearRect(0, 0, w, h);
+        eqCtx.strokeStyle = 'rgba(51, 65, 85, 0.3)';
+        eqCtx.lineWidth = 1;
+        eqCtx.font = '9px JetBrains Mono';
+        eqCtx.fillStyle = '#475569';
+        const freqs = [20, 50, 100, 200, 500, 1000, 2000, 5000, 10000, 20000];
+        freqs.forEach(f => {
+          const x = (Math.log10(f / 20) / Math.log10(20000 / 20)) * w;
+          eqCtx.beginPath(); eqCtx.moveTo(x, 0); eqCtx.lineTo(x, h); eqCtx.stroke();
+          if (f >= 1000) eqCtx.fillText(`${f/1000}k`, x + 3, h - 6);
+          else eqCtx.fillText(`${f}`, x + 3, h - 6);
+        });
+        if (n.outputAnalyser && isPlaying) {
+          n.outputAnalyser.getByteFrequencyData(fftData);
+          eqCtx.fillStyle = 'rgba(56, 189, 248, 0.15)';
+          const barWidth = w / 128;
+          for (let i = 0; i < 128; i++) {
+            const val = fftData[i * 4] / 255;
+            eqCtx.fillRect(i * barWidth, h - val * h, barWidth - 1, val * h);
+          }
+        }
+        eqCtx.strokeStyle = '#38bdf8';
+        eqCtx.lineWidth = 2.5;
+        eqCtx.beginPath();
+        for (let x = 0; x < w; x++) {
+          const freq = 20 * Math.pow(20000 / 20, x / w);
+          let gainDb = 0;
+          if (s.eqActive) {
+            gainDb += s.eqLowGain / (1 + Math.pow(freq / 100, 2));
+            gainDb += s.eqMid1Gain * Math.exp(-Math.pow(Math.log(freq / 822), 2) * 2);
+            gainDb += s.eqMid2Gain * Math.exp(-Math.pow(Math.log(freq / 3200), 2) * 2);
+            gainDb += s.eqHighGain / (1 + Math.pow(10000 / freq, 2));
+          }
+          const y = h / 2 - (gainDb / 18) * (h / 2);
+          if (x === 0) eqCtx.moveTo(x, y); else eqCtx.lineTo(x, y);
+        }
+        eqCtx.stroke();
+      }
+
+      // Imager Vectorscope
+      const imagerCanvas = imagerCanvasRef.current;
+      if (imagerCanvas) {
+        const iw = imagerCanvas.width, ih = imagerCanvas.height;
+        const ic = imagerCanvas.getContext('2d');
+        ic.clearRect(0, 0, iw, ih);
+        ic.strokeStyle = 'rgba(51, 65, 85, 0.4)';
+        ic.lineWidth = 1;
+        ic.beginPath();
+        ic.arc(iw / 2, ih / 2, ih / 3, 0, Math.PI * 2);
+        ic.stroke();
+        if (isPlaying) {
+          ic.fillStyle = '#38bdf8';
+          for (let i = 0; i < 40; i++) {
+            const angle = (Math.random() - 0.5) * (Math.PI / 2) + (-Math.PI / 2);
+            const radius = (Math.random() * (ih / 3.2));
+            const x = iw / 2 + Math.cos(angle) * radius * (1 + s.w3 / 100);
+            const y = ih / 2 + Math.sin(angle) * radius;
+            ic.fillRect(x, y, 2, 2);
+          }
+        }
+      }
+
+      // I/O Meters
+      const renderMeter = (ctxRef, level, textId) => {
+        const canvas = ctxRef.current;
+        if (!canvas) return;
+        const w = canvas.width, h = canvas.height;
+        const ctx = canvas.getContext('2d');
+        ctx.clearRect(0, 0, w, h);
+        const barH = level * h;
+        const grad = ctx.createLinearGradient(0, h, 0, 0);
+        grad.addColorStop(0, '#38bdf8');
+        grad.addColorStop(0.7, '#f59e0b');
+        grad.addColorStop(1, '#ef4444');
+        ctx.fillStyle = grad;
+        ctx.fillRect(2, h - barH, w - 4, barH);
+        const el = document.getElementById(textId);
+        if (el) el.innerText = isPlaying ? `${(20 * Math.log10(level)).toFixed(1)} dB` : '-inf dB';
+      };
+      renderMeter(inMeterCanvasRef, isPlaying ? 0.55 : 0.05, 'inPeakText');
+      renderMeter(outMeterCanvasRef, isPlaying ? 0.85 : 0.05, 'outPeakText');
+    }
+
+    renderFrame();
+
+    // Knob setup
+    if (!knobsInitializedRef.current) {
+      knobsInitializedRef.current = true;
+      const container = document.getElementById('masteringModalBody');
+      if (container) {
+        container.querySelectorAll('.knob-container').forEach(knob => {
+          let isDragging = false, startY = 0, startVal = 0;
+          const param = knob.dataset.param;
+          if (!param) return;
+          const min = parseFloat(knob.dataset.min);
+          const max = parseFloat(knob.dataset.max);
+          const unit = knob.dataset.unit || '';
+          const dial = knob.querySelector('.knob-dial');
+          const valText = knob.querySelector('.knob-val');
+
+          function updateUI(val) {
+            const pct = (val - min) / (max - min);
+            const angle = -135 + pct * 270;
+            if (dial) dial.style.transform = `rotate(${angle}deg)`;
+            if (valText) valText.innerText = `${val > 0 && unit === 'dB' ? '+' : ''}${val.toFixed(1)} ${unit}`;
+            setOzState(prev => ({ ...prev, [param]: val }));
+          }
+
+          const startValParsed = parseFloat(knob.dataset.value);
+          updateUI(startValParsed);
+
+          knob.addEventListener('pointerdown', e => {
+            isDragging = true;
+            startY = e.clientY;
+            startVal = ozStateRef.current[param] !== undefined ? ozStateRef.current[param] : startValParsed;
+            knob.setPointerCapture(e.pointerId);
+          });
+          knob.addEventListener('pointermove', e => {
+            if (!isDragging) return;
+            const deltaY = startY - e.clientY;
+            let newVal = startVal + (deltaY / 100) * (max - min);
+            newVal = Math.min(max, Math.max(min, newVal));
+            updateUI(newVal);
+          });
+          knob.addEventListener('pointerup', e => {
+            isDragging = false;
+            knob.releasePointerCapture(e.pointerId);
+          });
+          knob.addEventListener('pointercancel', e => {
+            isDragging = false;
+            knob.releasePointerCapture(e.pointerId);
+          });
+        });
+      }
+    }
+
+    return () => {
+      window.removeEventListener('resize', resizeAll);
+      if (animFrameRef.current) cancelAnimationFrame(animFrameRef.current);
+    };
+  }, [isOpen]);
+
+  React.useEffect(() => {
+    updateAudioGraphValues();
+  }, [ozState.eqLowGain, ozState.eqMid1Gain, ozState.eqMid2Gain, ozState.eqHighGain, ozState.maxGain, ozState.eqActive, ozState.maximizerActive]);
+
+  React.useEffect(() => {
+    if (!isOpen) {
+      stopAudioDemo();
+      knobsInitializedRef.current = false;
+    }
+  }, [isOpen]);
+
+  if (!isOpen) return null;
+
+  const switchModule = (name) => setOzState(prev => ({ ...prev, activeModule: name }));
+
+  const bandKnob = (param, min, max, val, unit, label, freq, color, filterType) => (
+    <div className="bg-slate-900/80 border border-slate-800 p-2.5 rounded-lg flex flex-col justify-between">
+      <div className="flex items-center justify-between text-xs font-bold" style={{color}}>
+        <span>{label}</span>
+        <span className="text-[10px] font-mono text-slate-400">{freq}</span>
+      </div>
+      <div className="flex items-center justify-around my-2">
+        <div className="knob-container" data-param={param} data-min={min} data-max={max} data-value={val} data-unit={unit}>
+          <div className="knob-dial w-9 h-9 rounded-full bg-slate-800 border-2 relative flex items-center justify-center shadow-md" style={{borderColor: color}}>
+            <div className="knob-pointer w-0.5 h-3 rounded absolute top-1" style={{backgroundColor: color}}></div>
+          </div>
+        </div>
+        <div className="text-center font-mono">
+          <span className="knob-val text-xs text-slate-200 font-bold">{val > 0 && unit === 'dB' ? '+' : ''}{val.toFixed(1)} {unit}</span>
+        </div>
+      </div>
+      <div className="text-[9px] text-slate-500 font-mono text-center">{filterType}</div>
+    </div>
+  );
+
+  return (
+    <div className="fixed inset-0 z-[100] flex items-center justify-center bg-black/70 backdrop-blur-sm" onClick={onClose}>
+      <div id="masteringModalBody" className="flex flex-col bg-slate-950 text-slate-200 w-[95vw] h-[92vh] max-w-[1400px] rounded-2xl border border-slate-800/80 shadow-2xl overflow-hidden" onClick={e => e.stopPropagation()} style={{fontFamily: "'Inter', sans-serif"}}>
+
+        {/* TOP TRANSPORT & SESSION BAR */}
+        <header className="h-12 bg-slate-900/90 border-b border-slate-800/80 flex items-center justify-between px-4 z-30 shrink-0">
+          <div className="flex items-center gap-3">
+            <div className="w-7 h-7 rounded-lg bg-cyan-600 flex items-center justify-center font-bold text-white shadow-lg shadow-cyan-950">
+              <i data-lucide="zap" className="w-3.5 h-3.5"></i>
+            </div>
+            <div>
+              <h1 className="text-xs font-bold tracking-wider text-white flex items-center gap-2">
+                MASTERING SUITE <span className="text-[9px] bg-cyan-950 text-cyan-400 border border-cyan-800/80 px-1.5 py-0.5 rounded oz-font-mono">WEB MASTERING V10.5</span>
+              </h1>
+            </div>
+          </div>
+          <div className="flex items-center gap-3 bg-slate-950 px-3 py-1 rounded-lg border border-slate-800/80">
+            <button onClick={startAudioDemo} className="px-3 py-1 bg-cyan-600 hover:bg-cyan-500 text-white rounded text-xs font-semibold flex items-center gap-1.5 transition-all shadow-md shadow-cyan-950">
+              <i data-lucide="play" className="w-3 h-3"></i> <span>Play Reference</span>
+            </button>
+            <button onClick={stopAudioDemo} className="px-3 py-1 bg-slate-800 hover:bg-slate-700 text-slate-300 rounded text-xs font-semibold flex items-center gap-1.5 transition-all">
+              <i data-lucide="square" className="w-3 h-3"></i> <span>Stop</span>
+            </button>
+            <div className="h-4 w-[1px] bg-slate-800 mx-1"></div>
+            <div className="flex items-center gap-2 text-xs oz-font-mono">
+              <span className="text-slate-400 text-[11px]">Preset:</span>
+              <select className="bg-slate-900 border border-slate-700 rounded px-2 py-0.5 text-xs text-cyan-300 outline-none focus:border-cyan-500">
+                <option value="adaptive">Adaptive Dynamic Master</option>
+                <option value="edm_club">EDM / Club Punch Maximizer</option>
+                <option value="wide_space">Cinematic Stereo Expansion</option>
+                <option value="transparent">Transparent High-Clarity Limiter</option>
+              </select>
+            </div>
+          </div>
+          <div className="flex items-center gap-3 text-xs oz-font-mono">
+            <span className="text-slate-400 text-[11px]">Target LUFS:</span>
+            <span className="text-cyan-400 font-bold bg-slate-950 border border-cyan-900/60 px-2 py-0.5 rounded">-11.0 LUFS</span>
+            <button onClick={onClose} className="text-slate-500 hover:text-slate-300 ml-2">
+              <i data-lucide="x" className="w-4 h-4"></i>
+            </button>
+          </div>
+        </header>
+
+        {/* MODULE CHAIN STRIP */}
+        <div className="h-16 bg-slate-950 border-b border-slate-800 px-4 flex items-center gap-2 overflow-x-auto shrink-0 oz-scrollbar">
+          <span className="text-[10px] font-bold text-slate-500 uppercase tracking-widest mr-1 oz-font-mono shrink-0">CHAIN:</span>
+
+          <div onClick={() => switchModule('eq')} className={`w-36 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all ${ozState.activeModule === 'eq' ? 'oz-card-active' : 'oz-card'}`}>
+            <div className="flex items-center gap-2">
+              <button onClick={e => { e.stopPropagation(); setOzState(prev => ({ ...prev, eqActive: !prev.eqActive })); }} className="w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold" style={{backgroundColor: ozState.eqActive ? '#38bdf8' : '#334155', color: ozState.eqActive ? '#0f172a' : '#94a3b8'}}>
+                <i data-lucide="power" className="w-2.5 h-2.5"></i>
+              </button>
+              <div>
+                <div className="text-[11px] font-bold text-slate-200">Dynamic EQ</div>
+                <div className="text-[9px] text-cyan-400 oz-font-mono">4-Band Peak</div>
+              </div>
+            </div>
+            <i data-lucide="activity" className="w-3.5 h-3.5 text-slate-500"></i>
+          </div>
+
+          <div onClick={() => switchModule('imager')} className={`w-36 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all ${ozState.activeModule === 'imager' ? 'oz-card-active' : 'oz-card'}`}>
+            <div className="flex items-center gap-2">
+              <button onClick={e => { e.stopPropagation(); setOzState(prev => ({ ...prev, imagerActive: !prev.imagerActive })); }} className="w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold" style={{backgroundColor: ozState.imagerActive ? '#38bdf8' : '#334155', color: ozState.imagerActive ? '#0f172a' : '#94a3b8'}}>
+                <i data-lucide="power" className="w-2.5 h-2.5"></i>
+              </button>
+              <div>
+                <div className="text-[11px] font-bold text-slate-200">Imager</div>
+                <div className="text-[9px] text-slate-400 oz-font-mono">4-Band Width</div>
+              </div>
+            </div>
+            <i data-lucide="radio" className="w-3.5 h-3.5 text-slate-500"></i>
+          </div>
+
+          <div onClick={() => switchModule('maximizer')} className={`w-36 h-12 rounded-lg p-2 flex items-center justify-between cursor-pointer transition-all ${ozState.activeModule === 'maximizer' ? 'oz-card-active' : 'oz-card'}`}>
+            <div className="flex items-center gap-2">
+              <button onClick={e => { e.stopPropagation(); setOzState(prev => ({ ...prev, maximizerActive: !prev.maximizerActive })); }} className="w-4 h-4 rounded-full flex items-center justify-center text-[9px] font-bold" style={{backgroundColor: ozState.maximizerActive ? '#38bdf8' : '#334155', color: ozState.maximizerActive ? '#0f172a' : '#94a3b8'}}>
+                <i data-lucide="power" className="w-2.5 h-2.5"></i>
+              </button>
+              <div>
+                <div className="text-[11px] font-bold text-slate-200">Maximizer</div>
+                <div className="text-[9px] text-slate-400 oz-font-mono">IRC IV True Peak</div>
+              </div>
+            </div>
+            <i data-lucide="gauge" className="w-3.5 h-3.5 text-slate-500"></i>
+          </div>
+
+          <div className="w-24 h-12 rounded-lg border border-dashed border-slate-800 flex items-center justify-center text-slate-600 hover:text-slate-400 hover:border-slate-600 cursor-pointer transition-all shrink-0">
+            <i data-lucide="plus" className="w-4 h-4"></i>
+          </div>
+        </div>
+
+        {/* MAIN WORKSPACE */}
+        <main className="flex-1 flex overflow-hidden min-h-0">
+
+          {/* LEFT: MODULE VIEWS */}
+          <div className="flex-1 flex flex-col bg-slate-950 relative overflow-y-auto oz-scrollbar">
+
+            {/* SUB HEADER TOOLBAR */}
+            <div className="h-9 bg-slate-900/60 border-b border-slate-800/80 px-4 flex items-center justify-between text-xs oz-font-mono shrink-0">
+              <div className="flex items-center gap-3">
+                <span className="text-slate-400 flex items-center gap-1.5"><i data-lucide="headphones" className="w-3 h-3 text-cyan-400"></i> Delta Listen</span>
+                <select className="bg-slate-950 border border-slate-800 rounded px-2 py-0.5 text-[11px] text-slate-300 outline-none">
+                  <option value="irc4">IRC IV - Classic</option>
+                  <option value="irc3">IRC III - Balanced</option>
+                  <option value="irc2">IRC II - Crisp</option>
+                </select>
+              </div>
+              <div className="flex items-center gap-2 text-[11px]">
+                <span className="text-slate-400">Learn Input Gain:</span>
+                <button className="bg-cyan-950 text-cyan-300 border border-cyan-800/80 px-2 py-0.5 rounded font-bold hover:bg-cyan-900 transition-colors">-11.0 LUFS</button>
+              </div>
+            </div>
+
+            {/* VIEW: DYNAMIC EQ */}
+            <div className={`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule === 'eq' ? '' : 'hidden'}`}>
+              <div className="relative w-full h-64 bg-slate-950 border border-slate-800/90 rounded-xl overflow-hidden shadow-inner cursor-crosshair">
+                <canvas ref={eqCanvasRef} className="w-full h-full block"></canvas>
+              </div>
+              <div className="oz-panel p-3 rounded-xl grid grid-cols-4 gap-3">
+                {bandKnob('eqLowGain', -12, 12, 1.5, 'dB', 'BAND 1 (LOW)', '100 Hz', '#22d3ee', 'Shelf Filter')}
+                {bandKnob('eqMid1Gain', -12, 12, -1.0, 'dB', 'BAND 2 (MID LOW)', '822 Hz', '#fbbf24', 'Dynamic Bell (Q: 0.7)')}
+                {bandKnob('eqMid2Gain', -12, 12, 2.0, 'dB', 'BAND 3 (MID HIGH)', '3.2 kHz', '#a855f7', 'Dynamic Bell (Q: 1.2)')}
+                {bandKnob('eqHighGain', -12, 12, 1.8, 'dB', 'BAND 4 (HIGH)', '10 kHz', '#34d399', 'High Shelf')}
+              </div>
+            </div>
+
+            {/* VIEW: STEREO IMAGER */}
+            <div className={`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule === 'imager' ? '' : 'hidden'}`}>
+              <div className="grid grid-cols-12 gap-4 flex-1">
+                <div className="col-span-8 bg-slate-950 border border-slate-800/90 rounded-xl p-3 flex flex-col relative shadow-inner">
+                  <span className="text-xs font-bold text-cyan-400 uppercase oz-font-mono mb-2">
+                    <i data-lucide="radio" className="w-3.5 h-3.5"></i> Polar Vectorscope & Correlation Meter
+                  </span>
+                  <div className="flex-1 relative w-full h-56 flex items-center justify-center">
+                    <canvas ref={imagerCanvasRef} className="w-full h-full block"></canvas>
+                  </div>
+                </div>
+                <div className="col-span-4 oz-panel p-3 rounded-xl flex flex-col justify-between">
+                  <span className="text-xs font-bold text-slate-300 uppercase oz-font-mono">4-Band Stereo Width</span>
+                  <div className="space-y-3 my-auto">
+                    {[{id:'w1',label:'Band 1 (0-100Hz)',color:'#22d3ee',val:ozState.w1},
+                      {id:'w2',label:'Band 2 (100-1kHz)',color:'#fbbf24',val:ozState.w2},
+                      {id:'w3',label:'Band 3 (1k-6kHz)',color:'#a855f7',val:ozState.w3},
+                      {id:'w4',label:'Band 4 (6k-20kHz)',color:'#34d399',val:ozState.w4}].map(b => (
+                      <div key={b.id}>
+                        <div className="flex justify-between text-[11px] font-mono mb-1">
+                          <span style={{color:b.color,fontWeight:700}}>{b.label}</span>
+                          <span id={b.id+'Val'}>{b.val}%</span>
+                        </div>
+                        <input type="range" min="-100" max="100" value={b.val}
+                          onChange={e => setOzState(prev => ({...prev, [b.id]: parseInt(e.target.value)}))}
+                          className="w-full h-1 cursor-pointer" style={{accentColor: b.color}} />
+                      </div>
+                    ))}
+                  </div>
+                </div>
+              </div>
+            </div>
+
+            {/* VIEW: MAXIMIZER */}
+            <div className={`flex-1 flex flex-col p-4 gap-4 ${ozState.activeModule === 'maximizer' ? '' : 'hidden'}`}>
+              <div className="oz-panel p-4 rounded-xl flex-1 grid grid-cols-12 gap-6 items-center">
+                <div className="col-span-4 flex flex-col items-center justify-center border-r border-slate-800 pr-4">
+                  <span className="text-xs font-bold text-slate-400 uppercase oz-font-mono mb-3">Maximizer Gain Boost</span>
+                  <div className="knob-container my-2" data-param="maxGain" data-min="0" data-max="12" data-value="5.4" data-unit="dB">
+                    <div className="knob-dial w-24 h-24 rounded-full bg-slate-900 border-4 border-cyan-500 relative flex items-center justify-center shadow-2xl">
+                      <div className="knob-pointer w-1 h-8 bg-cyan-400 rounded absolute top-2"></div>
+                      <span className="knob-val text-sm font-bold oz-font-mono text-cyan-300 z-10">+5.4 dB</span>
+                    </div>
+                  </div>
+                  <div className="w-full mt-4 bg-slate-950 p-2 rounded-lg border border-slate-800 text-xs oz-font-mono flex justify-between items-center">
+                    <span className="text-slate-400">Ceiling Level:</span>
+                    <span className="text-cyan-400 font-bold">{ozState.ceiling.toFixed(2)} dB</span>
+                  </div>
+                </div>
+                <div className="col-span-8 grid grid-cols-3 gap-4">
+                  <div className="bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center">
+                    <span className="text-[10px] font-bold text-slate-400 oz-font-mono mb-2">UPWARD COMPRESS</span>
+                    <div className="knob-container" data-param="maxUpward" data-min="0" data-max="10" data-value="2.0" data-unit="dB">
+                      <div className="knob-dial w-12 h-12 rounded-full bg-slate-800 border-2 border-cyan-500 relative flex items-center justify-center">
+                        <div className="knob-pointer w-0.5 h-4 bg-cyan-400 rounded absolute top-1"></div>
+                      </div>
+                    </div>
+                    <span className="knob-val text-xs font-mono text-slate-200 mt-2">+2.0 dB</span>
+                  </div>
+                  <div className="bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center">
+                    <span className="text-[10px] font-bold text-slate-400 oz-font-mono mb-2">SOFT CLIPPER</span>
+                    <div className="knob-container" data-param="maxSoftClip" data-min="0" data-max="100" data-value="15" data-unit="%">
+                      <div className="knob-dial w-12 h-12 rounded-full bg-slate-800 border-2 border-amber-500 relative flex items-center justify-center">
+                        <div className="knob-pointer w-0.5 h-4 bg-amber-400 rounded absolute top-1"></div>
+                      </div>
+                    </div>
+                    <span className="knob-val text-xs font-mono text-slate-200 mt-2">15%</span>
+                  </div>
+                  <div className="bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center">
+                    <span className="text-[10px] font-bold text-slate-400 oz-font-mono mb-2">TRANSIENT EMPHASIS</span>
+                    <div className="knob-container" data-param="maxTransient" data-min="0" data-max="100" data-value="25" data-unit="%">
+                      <div className="knob-dial w-12 h-12 rounded-full bg-slate-800 border-2 border-emerald-500 relative flex items-center justify-center">
+                        <div className="knob-pointer w-0.5 h-4 bg-emerald-400 rounded absolute top-1"></div>
+                      </div>
+                    </div>
+                    <span className="knob-val text-xs font-mono text-slate-200 mt-2">25%</span>
+                  </div>
+                </div>
+              </div>
+            </div>
+
+          </div>
+
+          {/* RIGHT SIDEBAR: I/O METERS */}
+          <div className="w-64 bg-slate-900 border-l border-slate-800/80 p-3 flex flex-col justify-between shadow-2xl oz-font-mono text-xs z-20 shrink-0">
+            <div className="flex items-center justify-between border-b border-slate-800 pb-2 mb-2">
+              <span className="text-xs font-bold text-white tracking-wider uppercase flex items-center gap-1.5">
+                <i data-lucide="sliders" className="w-3 h-3 text-cyan-400"></i> I/O METERS
+              </span>
+              <span className="text-[9px] bg-cyan-950 border border-cyan-800 text-cyan-300 px-1 py-0.5 rounded">TRUE PEAK</span>
+            </div>
+
+            <div className="grid grid-cols-2 gap-2 text-[10px] text-center mb-2">
+              <div className="bg-slate-950 border border-slate-800/80 p-1.5 rounded">
+                <div className="text-slate-500 font-bold">IN PEAK</div>
+                <div id="inPeakText" className="text-cyan-400 font-bold oz-font-mono">-inf dB</div>
+              </div>
+              <div className="bg-slate-950 border border-slate-800/80 p-1.5 rounded">
+                <div className="text-slate-500 font-bold">OUT PEAK</div>
+                <div id="outPeakText" className="text-emerald-400 font-bold oz-font-mono">-inf dB</div>
+              </div>
+            </div>
+
+            <div className="flex-1 bg-slate-950 border border-slate-800/90 rounded-xl p-2 flex justify-around relative overflow-hidden my-1">
+              <div className="flex flex-col items-center h-full">
+                <span className="text-[9px] text-slate-500 mb-1">IN</span>
+                <div className="flex-1 w-5 bg-slate-900 border border-slate-800 rounded relative overflow-hidden flex items-end">
+                  <canvas ref={inMeterCanvasRef} className="w-full h-full block"></canvas>
+                </div>
+              </div>
+              <div className="flex flex-col items-center h-full">
+                <span className="text-[9px] text-slate-500 mb-1">OUT</span>
+                <div className="flex-1 w-6 bg-slate-900 border border-slate-800 rounded relative overflow-hidden flex items-end">
+                  <canvas ref={outMeterCanvasRef} className="w-full h-full block"></canvas>
+                </div>
+              </div>
+            </div>
+
+            <div className="grid grid-cols-2 gap-1.5 mt-2">
+              <button onClick={() => setOzState(prev => ({ ...prev, isBypassed: !prev.isBypassed }))}
+                className={`py-1.5 rounded text-[10px] font-bold border transition-colors ${ozState.isBypassed ? 'bg-cyan-600 border-cyan-500 text-white' : 'bg-slate-800 hover:bg-slate-700 text-slate-200 border-slate-700'}`}>
+                Bypass
+              </button>
+              <button className="bg-slate-800 hover:bg-slate-700 text-slate-200 py-1.5 rounded text-[10px] font-bold border border-slate-700 transition-colors">Gain Match</button>
+              <button className="bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700">Codec</button>
+              <button className="bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700">Dither</button>
+            </div>
+          </div>
+
+        </main>
+      </div>
+    </div>
+  );
+};
+
 const App = () => {
   // ── State Definitions ──
   const [tracks, setTracks] = useState([{
@@ -7707,6 +8326,7 @@ const App = () => {
   const [aiConfigModalOpen, setAiConfigModalOpen] = useState(false);
   const [aiPresetModalOpen, setAiPresetModalOpen] = useState(false);
   const [aiPresetVersion, setAiPresetVersion] = useState(0);
+  const [showMasteringModal, setShowMasteringModal] = useState(false);
   const [pluginManagerModalOpen, setPluginManagerModalOpen] = useState(false);
   const [pluginsData, setPluginsData] = useState(null);
   useEffect(() => {
@@ -15582,6 +16202,11 @@ const App = () => {
       label: 'Export MIDI...',
       icon: 'music',
       action: () => triggerMidiExport()
+    }, {
+      label: 'Mastering Suite',
+      icon: 'wand-2',
+      shortcut: 'Ctrl+Shift+M',
+      action: () => setShowMasteringModal(true)
     }, {
       sep: true
     }, ...(currentUser ? [{
@@ -18661,6 +19286,9 @@ const App = () => {
   }), /*#__PURE__*/React.createElement(AIPresetModal, {
     isOpen: aiPresetModalOpen,
     onClose: () => { setAiPresetModalOpen(false); setAiPresetVersion(v => v + 1); }
+  }), /*#__PURE__*/React.createElement(MasteringModal, {
+    isOpen: showMasteringModal,
+    onClose: () => setShowMasteringModal(false)
   }), instrumentSelectorTrackId && /*#__PURE__*/React.createElement("div", {
     className: "fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm",
     onClick: closeInstrumentSelector
diff --git a/app/static/js/app.precompiled.js b/app/static/js/app.precompiled.js
index 17989f9..affe25d 100644
--- a/app/static/js/app.precompiled.js
+++ b/app/static/js/app.precompiled.js
@@ -172,7 +172,14 @@ const rc=rightClickDragRef.current;if(rc.active&&(Math.abs(e.clientX-rc.startX)>
 const minOrigStart=Math.min(...draggedNote.selectedNotesOffset.map(o=>o.originalStartBeat));const clampedDeltaBeat=minOrigStart+deltaBeat<0?-minOrigStart:deltaBeat;const deltaPitch=Math.round(pitch-draggedNote.startOffsetPitch);setNotes(prev=>prev.map(n=>{const offset=draggedNote.selectedNotesOffset.find(o=>o.id===n.id);if(!offset)return n;return{...n,start_beat:getSnapBeat(Math.max(0,offset.originalStartBeat+clampedDeltaBeat),snapVal),pitch:Math.max(0,Math.min(127,offset.originalPitch+deltaPitch))};}));}};const handleGridMouseUp=()=>{setDraggedNote(null);setSelectionMarquee(null);rightClickDragRef.current={active:false,startX:0,startY:0};if(brushAutoScrollRef.current){clearInterval(brushAutoScrollRef.current.id);brushAutoScrollRef.current=null;}};const handleContextMenu=e=>{e.preventDefault();if(swallowContextMenuRef.current){swallowContextMenuRef.current=false;return;}const pos={x:e.clientX,y:e.clientY,parentKey:null};scaleMenuOriginRef.current={x:pos.x,y:pos.y};setScaleMenuPos(pos);};const ccDragRef=React.useRef(null);const brushAutoScrollRef=React.useRef(null);const rightClickDragRef=React.useRef({active:false,startX:0,startY:0});const swallowContextMenuRef=React.useRef(false);const findCCNoteIndex=(b,mouseY,ccH)=>{const snapped=getSnapBeat(b,snapVal);const hits=[];notes.forEach((n,idx)=>{if(snapped>=n.start_beat&&snapped<=n.start_beat+n.duration_beats){const nv=ccMode==='pan'?(n.pan||0)*0.5+0.5:n.velocity!==undefined?n.velocity:0.8;const stemTop=ccH-(nv*(ccH-20)+10);hits.push({idx,dist:Math.abs(stemTop-mouseY)});}});if(hits.length>0){hits.sort((a,b)=>a.dist-b.dist);return hits[0].idx;}let nearest=-1;let minDist=Infinity;notes.forEach((n,idx)=>{const center=n.start_beat+n.duration_beats/2;const d=Math.abs(center-snapped);if(d<minDist){minDist=d;nearest=idx;}});return nearest;};const handleCCMouseDown=e=>{const canvas=ccCanvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const h=rect.height;const beat=x/pixelsPerBeat-renderBeatOffset;const noteIdx=findCCNoteIndex(beat,y,h);const val=Math.max(0,Math.min(1,(h-y)/h));if(e.ctrlKey){if(selectedNoteIds.length>0){const cursorNoteIdx=findCCNoteIndex(beat,y,h);if(cursorNoteIdx!==-1&&selectedNoteIds.includes(notes[cursorNoteIdx]?notes[cursorNoteIdx].id:-1)){const currentNote=notes[cursorNoteIdx];const currentVal=ccMode==='pan'?(currentNote.pan||0)/2.0+0.5:currentNote.velocity!==undefined?currentNote.velocity:0.8;if(Math.abs(currentVal-val)>0.001){const updatedNotes=notes.map((n,i)=>{if(i!==cursorNoteIdx)return n;if(ccMode==='pan')return{...n,pan:(val-0.5)*2.0};return{...n,velocity:val};});setNotes(updatedNotes);if(isPlaying&&onRescheduleMidi)onRescheduleMidi(updatedNotes);}ccDragRef.current={active:true,lastBeat:beat,selectedMode:true,lastPainted:[cursorNoteIdx]};}else{ccDragRef.current={active:true,lastBeat:beat,selectedMode:true,lastPainted:[]};}}else{ccDragRef.current={active:true,lastBeat:beat,lastPainted:noteIdx!==-1?[noteIdx]:[]};}return;}if(noteIdx!==-1){const currentVal=ccMode==='pan'?(notes[noteIdx].pan||0)/2.0+0.5:notes[noteIdx].velocity!==undefined?notes[noteIdx].velocity:0.8;if(Math.abs(currentVal-val)>0.001){const updatedNotes=notes.map((n,i)=>{if(i!==noteIdx)return n;if(ccMode==='pan')return{...n,pan:(val-0.5)*2.0};return{...n,velocity:val};});setNotes(updatedNotes);if(isPlaying&&onRescheduleMidi)onRescheduleMidi(updatedNotes);}}};const handleCCMouseMove=e=>{if(!ccDragRef.current||!ccDragRef.current.active)return;const canvas=ccCanvasRef.current;if(!canvas)return;const rect=canvas.getBoundingClientRect();const x=e.clientX-rect.left;const y=e.clientY-rect.top;const h=rect.height;const beat=x/pixelsPerBeat-renderBeatOffset;const val=Math.max(0,Math.min(1,(h-y)/h));const drag=ccDragRef.current;const painted=drag.lastPainted||[];if(drag.selectedMode&&selectedNoteIds.length>0){const cursorNoteIdx=findCCNoteIndex(beat,y,h);if(cursorNoteIdx!==-1){const cursorNote=notes[cursorNoteIdx];if(cursorNote&&selectedNoteIds.includes(cursorNote.id)&&!painted.includes(cursorNoteIdx)){const currentVal=ccMode==='pan'?(cursorNote.pan||0)/2.0+0.5:cursorNote.velocity!==undefined?cursorNote.velocity:0.8;if(Math.abs(currentVal-val)>0.001){const updatedNotes=notes.map((n,i)=>{if(i!==cursorNoteIdx)return n;if(ccMode==='pan')return{...n,pan:(val-0.5)*2.0};return{...n,velocity:val};});setNotes(updatedNotes);if(isPlaying&&onRescheduleMidi)onRescheduleMidi(updatedNotes);}drag.lastPainted=[...painted,cursorNoteIdx];}}return;}const candidateIdx=findCCNoteIndex(beat,y,h);if(candidateIdx!==-1&&!painted.includes(candidateIdx)){const currentVal=ccMode==='pan'?(notes[candidateIdx].pan||0)/2.0+0.5:notes[candidateIdx].velocity!==undefined?notes[candidateIdx].velocity:0.8;if(Math.abs(currentVal-val)>0.001){const updatedNotes=notes.map((n,i)=>{if(i!==candidateIdx)return n;if(ccMode==='pan')return{...n,pan:(val-0.5)*2.0};return{...n,velocity:val};});setNotes(updatedNotes);if(isPlaying&&onRescheduleMidi)onRescheduleMidi(updatedNotes);}drag.lastPainted=[...painted,candidateIdx];}};const renderKeybed=()=>{var kbTrk=activeTracks.find(function(t){return t.id===st.trackId;});var kbCh=window.SonicPianoRoll?window.SonicPianoRoll.getTrackMidiChannel(kbTrk,activeTracks):kbTrk?kbTrk.midiChannel:0;var kbSynth=kbTrk?kbTrk.synth_engine:undefined;const keys=[];for(let pitch=127;pitch>=PITCH_START;pitch--){const isBlack=[1,3,6,8,10].includes(pitch%12);const notesArray=['C','C#','D','D#','E','F','F#','G','G#','A','A#','B'];const octave=Math.floor(pitch/12)-1;const label=`${notesArray[pitch%12]}${octave}`;const showLabel=pitch%12===0;keys.push(/*#__PURE__*/React.createElement("div",{key:pitch,style:{height:`${NoteHeight}px`},className:`w-[60px] shrink-0 border-b border-zinc-800 text-[9px] font-bold flex items-center justify-end pr-2 transition cursor-pointer ${activeMidiPitches&&activeMidiPitches.has(pitch)?'bg-emerald-500 text-white border-emerald-400':isBlack?'bg-zinc-950 text-slate-500 border-zinc-900 hover:bg-zinc-800':'bg-white text-zinc-800 border-r border-zinc-400 hover:bg-amber-100'}`,onMouseDown:e=>{e.stopPropagation();keybedMouseDownRef.current=true;try{if(window.SonicSF){window.SonicSF.playNote(pitch,100,500,undefined,st.instrumentProgram,null,kbCh,kbSynth);}}catch(err){console.error('playNote error:',err);}},onMouseEnter:e=>{if(keybedMouseDownRef.current){try{if(window.SonicSF){window.SonicSF.playNote(pitch,100,200,undefined,st.instrumentProgram,null,kbCh,kbSynth);}}catch(err){console.error('playNote error:',err);}}},onMouseUp:()=>{keybedMouseDownRef.current=false;}},showLabel&&label));}return keys;};const handleScroll=e=>{if(keybedRef.current){keybedRef.current.scrollTop=e.currentTarget.scrollTop;}if(rulerScrollRef.current){rulerScrollRef.current.scrollLeft=e.currentTarget.scrollLeft;}if(ccWrapperRef.current){ccWrapperRef.current.scrollLeft=e.currentTarget.scrollLeft;}const el=e.currentTarget;const THRESHOLD=200;if(el.scrollLeft+el.clientWidth>=el.scrollWidth-THRESHOLD){const newBeats=rollBeatsRef.current+16;setRollBeats(newBeats);}};const handleKeybedScroll=e=>{if(gridScrollRef.current){gridScrollRef.current.scrollTop=e.currentTarget.scrollTop;}};const SCALES={"None":null,"Diatonic":{"Major":[0,2,4,5,7,9,11],"Minor":[0,2,3,5,7,8,10],"Dorian":[0,2,3,5,7,9,10],"Phrygian":[0,1,3,5,7,8,10],"Lydian":[0,2,4,6,7,9,11],"Mixolydian":[0,2,4,5,7,9,10],"Locrian":[0,1,3,5,6,8,10]},"Pentatonic":{"Major":[0,2,4,7,9],"Minor":[0,3,5,7,10],"Blues":[0,3,5,6,7,10],"Chinese":[0,2,4,7,9],"Vietnam":[0,2,6,7,10],"India":[0,2,5,7,9],"Japan":[0,2,5,7,9],"Africa":[0,3,5,7,10]},"Church":{"Dorian":[0,2,3,5,7,9,10],"Phrygian":[0,1,3,5,7,8,10],"Lydian":[0,2,4,6,7,9,11],"Mixolydian":[0,2,4,5,7,9,10]},"Jazz":{"Blues":[0,3,5,6,7,10],"Bebop":[0,2,4,5,7,9,10,11],"Diminished":[0,2,3,5,6,8,9,11]},"Asian Traditional":{"Chinese":[0,2,4,7,9],"Vietnam":[0,2,6,7,10],"Japan":[0,2,5,7,9],"India":[0,2,5,7,9],"Gamelan":[0,2,4,7,9],"Korea":[0,2,4,5,7,9]},"Middle Eastern":{"Hijaz":[0,1,4,5,7,8,11],"Nikriz":[0,1,4,5,7,8,10],"Rast":[0,2,4,5,7,8,10],"Saba":[0,1,3,4,7,8,10],"Bayati":[0,2,3,4,7,8,10]}};const[selectedScale,setSelectedScale]=React.useState(null);const selectedScaleRef=React.useRef(null);selectedScaleRef.current=selectedScale;const snapToScaleRef=React.useRef(true);snapToScaleRef.current=st.snapToScale!==undefined?st.snapToScale:true;const[scaleMenuPos,setScaleMenuPos]=React.useState(null);const scaleMenuOriginRef=React.useRef(null);const[showCC,setShowCC]=React.useState(true);const[ccHeight,setCcHeight]=React.useState(80);const snapPitchToScale=(pitch,scale)=>{if(!scale)return pitch;const octave=Math.floor(pitch/12);const noteInOctave=pitch%12;if(scale.includes(noteInOctave))return pitch;let best=noteInOctave;let minDist=12;scale.forEach(s=>{const dist=Math.abs(s-noteInOctave);if(dist<minDist){minDist=dist;best=s;}});return octave*12+best;};const renderScaleContextMenu=()=>{const closeMenu=()=>setScaleMenuPos(null);const origin=scaleMenuOriginRef.current||scaleMenuPos;const items=[];let subMenu=null;const isSameScale=(a,b)=>{if(!a||!b)return a===b;if(a.length!==b.length)return false;return a.every((v,i)=>v===b[i]);};const pushItem=(label,onClick,onHover)=>{const isActive=onClick._scale&&isSameScale(onClick._scale,selectedScale);items.push(React.createElement("div",{key:label,onClick:()=>{onClick();closeMenu();},onMouseEnter:onHover||undefined,className:"px-3 py-1.5 text-xs cursor-pointer hover:bg-amber-600 hover:text-white whitespace-nowrap "+(isActive?"bg-amber-800/40 text-amber-300":"text-zinc-300")},label));};Object.keys(SCALES).forEach(key=>{const val=SCALES[key];if(val===null){pushItem("None",()=>setSelectedScale(null));return;}if(Array.isArray(val)){pushItem(key,()=>setSelectedScale(val));}else{const parentKey=key;const isOpen=scaleMenuPos&&scaleMenuPos.parentKey===parentKey;pushItem(key+" ▸",()=>setSelectedScale(null),()=>{setScaleMenuPos({x:origin.x,y:origin.y,parentKey});});if(isOpen){const subs=[];Object.keys(val).forEach(subKey=>{subs.push(React.createElement("div",{key:subKey,onClick:()=>{setSelectedScale(val[subKey]);closeMenu();},className:"px-3 py-1.5 text-xs cursor-pointer hover:bg-amber-600 hover:text-white whitespace-nowrap "+(isSameScale(val[subKey],selectedScale)?"bg-amber-800/40 text-amber-300":"text-zinc-300")},subKey));});var subH=subs.length*30+16;var subTop=origin.y+subH+20>window.innerHeight?origin.y-subH:origin.y;subMenu=React.createElement("div",{style:{position:"fixed",left:origin.x+150,top:subTop,zIndex:10000},className:"bg-[#2a2a2a] border border-zinc-600 rounded shadow-xl py-1 min-w-[120px]"},...subs);}}});var menuH=items.length*30+16;var menuTop=origin.y+menuH+20>window.innerHeight?Math.max(10,origin.y-menuH):origin.y;return React.createElement(React.Fragment,null,React.createElement("div",{style:{position:"fixed",left:origin.x,top:menuTop,zIndex:9999},className:"bg-[#2a2a2a] border border-zinc-600 rounded shadow-xl py-1 min-w-[140px]"},...items),subMenu);};const renderBarLabels=()=>{const labels=[];const barsCount=Math.ceil(viewBeats/4);const barOffset=Math.floor(sessionStartBar);for(let bar=0;bar<barsCount;bar++){const x=bar*4*pixelsPerBeat;const displayBar=bar+barOffset;labels.push(/*#__PURE__*/React.createElement("div",{key:bar,style:{position:'absolute',left:`${x}px`,top:'4px'},className:"pl-1 border-l border-zinc-700 h-full select-none cursor-pointer hover:bg-zinc-800/30",onClick:e=>{e.stopPropagation();const barTime=bar*4*beatSec;setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,currentTime:barTime}:s));}},`Bar ${displayBar}`));}return labels;};const beatSec=60.0/(parseInt(bpm)||120);const playHeadX=(st.currentTime||0)/beatSec*pixelsPerBeat;return React.createElement("div",{className:"flex-1 flex overflow-hidden min-h-0 bg-[#1e1e1e] flex-col h-full"},/* 1. TOOLBAR HEADER */React.createElement("div",{className:"h-10 bg-[#282828] border-b border-zinc-900 flex items-center justify-between px-4 shrink-0 text-slate-200"},React.createElement("div",{className:"flex items-center gap-4"},React.createElement("select",{value:st.target_id||'',onChange:function(e){handleSwitchMidiItem(e.target.value);},className:"bg-zinc-800 border border-zinc-700 text-yellow-500 font-bold text-xs rounded px-1.5 py-0.5 outline-none focus:border-yellow-500 max-w-[180px] uppercase"},allMidiItems.map(function(m){return React.createElement("option",{key:m.id,value:m.id},(m._trackName||'')+' - '+(m.name||'MIDI'));})),activeParentTrackName?React.createElement("span",{className:"text-[9px] text-zinc-500 ml-1"},"(Belongs to: ",React.createElement("span",{className:"text-zinc-400 font-semibold"},activeParentTrackName),")"):null,React.createElement("div",{className:"flex items-center gap-1 text-xs"},React.createElement("span",{className:"text-zinc-500 font-semibold"},"Snap to Scale"),React.createElement("button",{onClick:()=>setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,snapToScale:!(s.snapToScale!==undefined?s.snapToScale:true)}:s)),className:`w-7 h-4 rounded-full transition-colors relative ${(st.snapToScale!==undefined?st.snapToScale:true)?'bg-yellow-600':'bg-zinc-700'}`,style:{padding:0}},React.createElement("div",{className:`w-3 h-3 rounded-full bg-white absolute top-0.5 transition-transform ${(st.snapToScale!==undefined?st.snapToScale:true)?'translate-x-3.5':'translate-x-0.5'}`}))),React.createElement("div",{className:"flex items-center gap-1 text-xs"},React.createElement("span",{className:"text-zinc-500 font-semibold"},"Snap:"),React.createElement("select",{value:snapVal,onChange:e=>setSnapVal(e.target.value),className:"bg-zinc-800 border border-zinc-700 text-zinc-300 rounded px-1.5 py-0.5 outline-none focus:border-yellow-500"},['free','4','1','1/2','1/4','1/8','1/16','1/32'].map(v=>React.createElement("option",{key:v,value:v},v)))),React.createElement("button",{onClick:()=>setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,isArmed:!s.isArmed}:s)),className:`px-2 py-1 rounded text-xs font-bold ${st.isArmed?'bg-red-600 text-white':'bg-zinc-800 text-zinc-400'}`},"ARM"),React.createElement("select",{value:selectedMidiInputId||'',onChange:e=>onMidiInputSelect(e.target.value),className:"bg-zinc-800 border border-zinc-700 text-zinc-300 rounded px-1 py-0.5 text-xs outline-none max-w-[100px]"},React.createElement("option",{value:""},"Input"),React.createElement("option",{value:"ALL"},"Omni"),(midiDevices||[]).map(d=>React.createElement("option",{key:d.id,value:d.id},d.name||d.id))),React.createElement("button",{onClick:()=>onInstrumentSelect&&onInstrumentSelect(st.trackId),title:st.instrumentName||"Synth",className:`px-1.5 py-0.5 text-[10px] rounded font-mono font-bold border transition flex items-center gap-0.5 max-w-[70px] ${st.instrumentName?'bg-violet-900 text-violet-300 border-violet-700':'bg-zinc-800 text-zinc-500 border-transparent hover:text-zinc-300'}`},React.createElement("i",{"data-lucide":"music",className:"w-3 h-3 shrink-0"}),React.createElement("span",{className:"truncate text-[9px]"},activeParentTrackName?'('+activeParentTrackName+') '+(st.instrumentName||'Synth'):st.instrumentName||'Synth')),React.createElement("div",{className:"flex items-center gap-1 ml-1 text-xs"},React.createElement("span",{className:"text-zinc-500"},"AI:"),React.createElement("input",{type:"number",value:aiBarStart,onChange:e=>setAiBarStart(parseInt(e.target.value)||0),className:"w-8 bg-zinc-900 border border-zinc-700 text-zinc-200 rounded px-1 py-0.5 text-xs text-center"}),React.createElement("span",{className:"text-zinc-500"},"-"),React.createElement("input",{type:"number",value:aiBarEnd,onChange:e=>setAiBarEnd(parseInt(e.target.value)||1),className:"w-8 bg-zinc-900 border border-zinc-700 text-zinc-200 rounded px-1 py-0.5 text-xs text-center"}),React.createElement("span",{className:"text-zinc-500"},"bar")),React.createElement("select",{value:ccMode,onChange:e=>setCcMode(e.target.value),className:"bg-zinc-800 text-zinc-200 border border-zinc-700 rounded px-1.5 py-1 text-xs capitalize cursor-pointer"},React.createElement("option",{value:"velocity"},"Velocity"),React.createElement("option",{value:"sustain"},"Sustain"),React.createElement("option",{value:"modulation"},"Modulation"),React.createElement("option",{value:"pitch_bend"},"Pitch Bend"),React.createElement("option",{value:"pan"},"Pan"))),React.createElement("button",{onClick:()=>setShowCC(!showCC),className:`px-2 py-1 rounded text-xs ${showCC?'bg-purple-900/60 text-purple-300 border border-purple-700':'text-zinc-500 hover:text-zinc-300'}`},ccMode==='velocity'?'Vel':ccMode==='sustain'?'Sus':ccMode==='modulation'?'Mod':ccMode==='pitch_bend'?'Bend':ccMode==='pan'?'Pan':'CC'),React.createElement("button",{onClick:function(){setSessionSyncMode(function(p){return!p;});},className:function(){var base='px-2 py-1 rounded text-xs ';return sessionSyncMode?base+'bg-cyan-900/60 text-cyan-300 border border-cyan-700':base+'text-zinc-500 hover:text-zinc-300';}(),title:sessionSyncMode?"Session-synced mode (ghost visible)":"Isolated mode (bar 0, no ghost)"},sessionSyncMode?"\uD83C\uDF10 Session":"\uD83D\uDCCB Isolated"),React.createElement("button",{onClick:function(){setShowGhostNotes(function(p){return!p;});},disabled:!sessionSyncMode,className:function(){if(!sessionSyncMode)return'px-2 py-1 rounded text-xs opacity-30 cursor-not-allowed';var base='px-2 py-1 rounded text-xs ';return showGhostNotes?base+'bg-purple-900/60 text-purple-300 border border-purple-700':base+'text-zinc-500 hover:text-zinc-300';}(),title:"Toggle ghost notes visibility"},"\uD83D\uDC7B Ghost"),React.createElement("div",{className:"flex items-center gap-1"},React.createElement("button",{onClick:()=>onSaveNotes(st.id,st.trackId,st.target_id,notes),className:"px-2.5 py-1 bg-emerald-600 hover:bg-emerald-500 text-white rounded text-xs flex items-center gap-1 transition font-semibold"},React.createElement("i",{"data-lucide":"save",className:"w-3 h-3"}),"Lưu"),React.createElement("button",{onClick:()=>{const ppq=480;const bpmNum=parseInt(bpm)||120;const ticksPerBeat=ppq;const events=[];(notes||[]).forEach(n=>{const startTick=Math.round((n.start_beat||0)*ticksPerBeat);const durTick=Math.round((n.duration_beats||1)*ticksPerBeat);const pitch=n.pitch||60;const vel=Math.round((n.velocity||0.8)*127);events.push({tick:startTick,type:'note_on',pitch,velocity:vel});events.push({tick:startTick+durTick,type:'note_off',pitch,velocity:0});});events.sort((a,b)=>a.tick-b.tick||(a.type==='note_off'?-1:1));const writeVLQ=(bytes,v)=>{let val=Math.max(0,v);const buf=[];buf.push(val&0x7F);while(val>0x7F){val>>=7;buf.push(0x80|val&0x7F);}for(let i=buf.length-1;i>=0;i--)bytes.push(buf[i]);};const trackBytes=[];let lastTick=0;events.forEach(ev=>{const delta=Math.max(0,ev.tick-lastTick);writeVLQ(trackBytes,delta);trackBytes.push(ev.type==='note_on'?0x90:0x80,ev.pitch,ev.velocity);lastTick=ev.tick;});writeVLQ(trackBytes,0);trackBytes.push(0xFF,0x2F,0x00);const trackData=[0x4D,0x54,0x72,0x6B];const len=trackBytes.length;trackData.push(len>>24&0xFF,len>>16&0xFF,len>>8&0xFF,len&0xFF);trackData.push(...trackBytes);const header=[0x4D,0x54,0x68,0x64,0x00,0x00,0x00,0x06,0x00,0x01,0x00,0x01,ppq>>8&0xFF,ppq&0xFF];const all=header.concat(trackData);const blob=new Blob([new Uint8Array(all)],{type:'audio/midi'});const url=URL.createObjectURL(blob);const a=document.createElement('a');a.href=url;a.download=(st.label||'midi')+'.mid';document.body.appendChild(a);a.click();document.body.removeChild(a);URL.revokeObjectURL(url);showToast('Đã xuất file MIDI!','success');},className:"px-2.5 py-1 bg-amber-700 hover:bg-amber-600 text-white rounded text-xs flex items-center gap-1 transition font-semibold"},React.createElement("i",{"data-lucide":"file-down",className:"w-3 h-3"}),"Export"),React.createElement("button",{onClick:onClose,className:"px-2.5 py-1 bg-zinc-800 hover:bg-zinc-700 text-zinc-300 border border-zinc-700 rounded text-xs flex items-center gap-1 transition"},React.createElement("i",{"data-lucide":"x",className:"w-3 h-3"}),"Đóng"))),/* 2. BAR RULER */React.createElement("div",{className:"h-6 bg-[#1a1a1f] border-b border-zinc-900 flex shrink-0"},React.createElement("div",{className:"w-[120px] bg-[#1e1e22] border-r border-zinc-800 shrink-0 flex items-end"},React.createElement("span",{className:"text-[8px] text-zinc-600 font-mono px-1.5 pb-0.5 uppercase tracking-wider"},"Tracks")),React.createElement("div",{className:"w-[60px] bg-[#222222] border-r border-zinc-900 shrink-0"}),React.createElement("div",{ref:rulerScrollRef,className:"flex-1 overflow-hidden",onMouseDown:e=>{const rect=e.currentTarget.getBoundingClientRect();const x=e.clientX-rect.left+e.currentTarget.scrollLeft;const clickBeat=x/pixelsPerBeat;const clickTime=clickBeat*beatSec;const clickInRange=loopStartBeat!==null&&loopEndBeat!==null&&clickBeat>=loopStartBeat&&clickBeat<=loopEndBeat;if(e.ctrlKey||e.metaKey){setLoopStartBeat(null);setLoopEndBeat(null);setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,selectionStart:null,selectionEnd:null}:s));return;}if(e.shiftKey){const beatSnap=getSnapBeat(clickBeat,snapVal);if(loopStartBeat===null){setLoopStartBeat(Math.max(0,beatSnap-4));setLoopEndBeat(Math.max(4,beatSnap));}else{setLoopEndBeat(Math.max(loopStartBeat+4,beatSnap));}return;}if(clickTime>=0){if(onSeekPlayhead){onSeekPlayhead(clickTime);}else{setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,currentTime:clickTime}:s));}}const snappedStartBeat=getSnapBeat(clickBeat,snapVal);rulerDragRef.current={startX:e.clientX,startBeat:snappedStartBeat,scrollLeft:e.currentTarget.scrollLeft};const onMove=ev=>{const r=rulerScrollRef.current;if(!r||!rulerDragRef.current)return;const rRect=r.getBoundingClientRect();const bx=ev.clientX-rRect.left+rulerDragRef.current.scrollLeft;const rawBeat=Math.max(0,bx/pixelsPerBeat);const beat=getSnapBeat(rawBeat,snapVal);if(Math.abs(ev.clientX-rulerDragRef.current.startX)>5){if(clickInRange){const rangeWidth=loopEndBeat-loopStartBeat;const offset=rulerDragRef.current.startBeat-loopStartBeat;const centerBeat=beat-offset;const halfRange=rangeWidth/2;const newStart=Math.max(0,centerBeat-halfRange);setLoopStartBeat(newStart);setLoopEndBeat(newStart+rangeWidth);setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,selectionStart:newStart*beatSec,selectionEnd:(newStart+rangeWidth)*beatSec}:s));}else{const sBeat=Math.max(0,Math.min(rulerDragRef.current.startBeat,beat));const eBeat=Math.max(sBeat+1,Math.max(rulerDragRef.current.startBeat,beat));setLoopStartBeat(sBeat);setLoopEndBeat(eBeat);setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,selectionStart:sBeat*beatSec,selectionEnd:eBeat*beatSec}:s));}}};const onUp=()=>{rulerDragRef.current=null;document.removeEventListener('mousemove',onMove);document.removeEventListener('mouseup',onUp);};document.addEventListener('mousemove',onMove);document.addEventListener('mouseup',onUp);}},React.createElement("div",{style:{width:`${viewWidth}px`,height:'100%'},className:"relative h-full font-mono text-[9px] text-zinc-500 font-bold"},renderBarLabels(),loopStartBeat!==null&&loopEndBeat!==null&&loopEndBeat>loopStartBeat&&React.createElement("div",{style:{left:`${loopStartBeat*pixelsPerBeat}px`,width:`${(loopEndBeat-loopStartBeat)*pixelsPerBeat}px`,top:0,bottom:0},className:"absolute bg-emerald-500/15 border-l border-r border-emerald-400"},React.createElement("div",{style:{position:'absolute',left:0,top:0,bottom:0,width:'4px',cursor:'ew-resize'},onMouseDown:e=>{e.stopPropagation();const startBeat=loopStartBeat;const onMove=ev=>{const r=rulerScrollRef.current;if(!r)return;const rRect=r.getBoundingClientRect();const bx=ev.clientX-rRect.left+r.scrollLeft;const nBeat=Math.max(0,Math.min(loopEndBeat-1,getSnapBeat(bx/pixelsPerBeat,snapVal)));setLoopStartBeat(nBeat);setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,selectionStart:nBeat*beatSec}:s));};const onUp=()=>{document.removeEventListener('mousemove',onMove);document.removeEventListener('mouseup',onUp);};document.addEventListener('mousemove',onMove);document.addEventListener('mouseup',onUp);}}),React.createElement("div",{style:{position:'absolute',right:0,top:0,bottom:0,width:'4px',cursor:'ew-resize'},onMouseDown:e=>{e.stopPropagation();const onMove=ev=>{const r=rulerScrollRef.current;if(!r)return;const rRect=r.getBoundingClientRect();const bx=ev.clientX-rRect.left+r.scrollLeft;const nBeat=Math.max(loopStartBeat+1,getSnapBeat(bx/pixelsPerBeat,snapVal));setLoopEndBeat(nBeat);setSubTabs(prev=>prev.map(s=>s.id===st.id?{...s,selectionEnd:nBeat*beatSec}:s));};const onUp=()=>{document.removeEventListener('mousemove',onMove);document.removeEventListener('mouseup',onUp);};document.addEventListener('mousemove',onMove);document.addEventListener('mouseup',onUp);}}))))),/* 3. MAIN PIANO ROLL GRID (KEYBOARD + TRACK COL + CANVAS) */React.createElement("div",{className:"flex-1 flex overflow-hidden min-h-0 relative"},/* Track column */React.createElement("div",{className:"w-[120px] bg-[#16161a] border-r border-zinc-800 shrink-0 flex flex-col z-10",style:{height:KeybedPixelHeight+'px'}},allMidiItems.length>0?function(){var seenTracks={};var els=[];allMidiItems.forEach(function(m){if(seenTracks[m._trackId])return;seenTracks[m._trackId]=true;var track=(activeTracks||[]).find(function(t){return t.id===m._trackId;});var isActive=m._trackId===st.trackId&&m.id===st.target_id;var isPlayOn=activePlayTrackIds===m._trackId;els.push(React.createElement("button",{key:m._trackId,onClick:function(){if(isActive)return;setActivePlayTrackIds(function(prev){return prev===m._trackId?null:m._trackId;});},className:"flex items-center justify-center h-[20px] border border-zinc-600 rounded-md cursor-pointer outline-none mx-1 my-[2px] "+(isActive?'bg-yellow-600 text-black font-bold':isPlayOn?'bg-red-700 text-white font-semibold':'bg-zinc-700 text-zinc-300 hover:bg-zinc-600')},React.createElement("span",{className:"text-[14px] font-sans truncate px-1",title:track?track.name:m._trackName},track?track.name:m._trackName)));});return els;}():null),React.createElement("div",{className:"w-[60px] shrink-0 flex flex-col border-r border-zinc-900 overflow-y-auto",ref:keybedRef,onScroll:handleKeybedScroll,style:{scrollbarWidth:'none',msOverflowStyle:'none'}},renderKeybed()),React.createElement("div",{ref:gridScrollRef,onScroll:handleScroll,className:"flex-1 overflow-auto bg-[#141414] min-w-0"},React.createElement("div",{style:{width:`${viewWidth}px`,height:`${(128-PITCH_START)*NoteHeight}px`},className:"relative"},React.createElement("canvas",{ref:canvasRef,onMouseDown:handleGridMouseDown,onMouseMove:handleGridMouseMove,onMouseUp:handleGridMouseUp,onMouseLeave:handleGridMouseUp,onContextMenu:handleContextMenu,className:"absolute inset-0 cursor-crosshair"}),loopStartBeat!==null&&loopEndBeat!==null&&loopEndBeat>loopStartBeat&&React.createElement("div",{style:{left:`${loopStartBeat*pixelsPerBeat}px`,width:`${(loopEndBeat-loopStartBeat)*pixelsPerBeat}px`,top:0,bottom:0},className:"absolute bg-emerald-500/10 border-l border-r border-emerald-400/50 pointer-events-none"})))),/* 4. CC / VELOCITY LANE (ĐẶT Ở ĐÁY) */showCC&&React.createElement("div",{style:{height:`${ccHeight}px`},className:"bg-[#161616] border-t border-zinc-900 flex shrink-0 relative"},React.createElement("div",{onMouseDown:e=>{e.preventDefault();const startY=e.clientY;const startH=ccHeight;const onMove=ev=>{setCcHeight(Math.max(40,startH+startY-ev.clientY));};const onUp=()=>{document.removeEventListener('mousemove',onMove);document.removeEventListener('mouseup',onUp);};document.addEventListener('mousemove',onMove);document.addEventListener('mouseup',onUp);},className:"absolute top-0 left-0 right-0 h-1.5 cursor-n-resize z-10 hover:bg-purple-600/30"}),React.createElement("div",{className:"w-[120px] shrink-0"}),React.createElement("div",{className:"w-[60px] bg-[#222222] border-r border-zinc-900 flex items-center justify-center text-[10px] text-zinc-500 font-mono shrink-0 font-bold"},ccMode.toUpperCase()),React.createElement("div",{ref:ccWrapperRef,className:"flex-1 overflow-x-hidden min-w-0"},React.createElement("div",{style:{width:`${viewWidth}px`,height:'100%'},className:"relative"},React.createElement("canvas",{ref:ccCanvasRef,onMouseDown:handleCCMouseDown,onMouseMove:handleCCMouseMove,onMouseUp:()=>{if(ccDragRef.current)ccDragRef.current.selectedMode=false;ccDragRef.current=null;},onMouseLeave:()=>{if(ccDragRef.current)ccDragRef.current.selectedMode=false;ccDragRef.current=null;},className:"absolute inset-0"}),loopStartBeat!==null&&loopEndBeat!==null&&loopEndBeat>loopStartBeat&&React.createElement("div",{style:{left:`${loopStartBeat*pixelsPerBeat}px`,width:`${(loopEndBeat-loopStartBeat)*pixelsPerBeat}px`,top:0,bottom:0},className:"absolute bg-emerald-500/10 border-l border-r border-emerald-400/50 pointer-events-none"})))),/* 5. OVERLAY / CONTEXT MENU */scaleMenuPos&&renderScaleContextMenu());};const serializeTracksList=(tracksList,secondsPerBar)=>{return(tracksList||[]).map(t=>{let trackType="AUDIO";if(t.sections&&t.sections.length>0)trackType="SECTION";else if(t.midiItems&&t.midiItems.length>0)trackType="MIDI";const items=[];if(trackType==="AUDIO"&&t.clips){t.clips.forEach(c=>{const durationSec=c.buffer?c.buffer.duration:4.0;items.push({id:c.id,name:c.name||"Audio Clip",type:"AUDIO_ITEM",start_bar:c.startTime/secondsPerBar,duration_bars:durationSec/(c.speed||1.0)/secondsPerBar,clip_start_offset_bars:0.0,source_data:{audio_file_url:t.serverFileId?`/static/audio/uploads/${t.serverFileId}`:"",sample_rate:c.buffer?c.buffer.sampleRate:44100,channels:c.buffer?c.buffer.numberOfChannels:2,gain:1.0}});});}else if(trackType==="MIDI"&&t.midiItems){t.midiItems.forEach(m=>{items.push({id:m.id,name:m.name||"MIDI Item",type:"MIDI_ITEM",start_bar:m.startTime/secondsPerBar,duration_bars:m.duration?m.duration/secondsPerBar:4.0,clip_start_offset_bars:0.0,source_data:{total_buffer_bars:m.duration?m.duration/secondsPerBar:8.0,notes:(m.notes||[]).map(n=>({id:n.id||'note_'+Math.random().toString(36).substr(2,9),pitch:n.pitch||60,start_beat:n.start_beat||0.0,duration_beats:n.duration_beats||1.0,velocity:n.velocity||0.8,pan:n.pan||0.0}))}});});}else if(trackType==="SECTION"&&t.sections){t.sections.forEach(s=>{items.push({id:s.id,name:s.name||"Section Item",type:"SECTION_ITEM",start_bar:s.start/secondsPerBar,duration_bars:s.duration/secondsPerBar,clip_start_offset_bars:0.0,source_data:{referenced_section_id:s.sectionId||s.id}});});}return{id:t.id,name:t.name,type:trackType,volume_db:t.volumeDb||0.0,pan:t.pan||0.0,mute:t.muted||false,solo:t.solo||false,instrument_id:t.instrumentId||null,instrument_program:t.instrumentProgram!==undefined?t.instrumentProgram:null,instrument_name:t.instrumentName||null,instrument_source:t.instrument_source||(t.synth_engine?t.synth_engine.type:null),soundfont_id:t.soundfont_id||(t.synth_engine?t.synth_engine.soundfont_id:null),soundfont_bank:t.soundfont_bank!==undefined?t.soundfont_bank:t.synth_engine?t.synth_engine.soundfont_bank:null,soundfont_program:t.soundfont_program!==undefined?t.soundfont_program:t.synth_engine?t.synth_engine.soundfont_program:null,synth_engine:t.synth_engine||undefined,items:items};});};const deserializeTracksList=(schemaTracks,secondsPerBar,sectionStore)=>{return(schemaTracks||[]).map(t=>{const clips=[];const sections=[];const midiItems=[];(t.items||[]).forEach(item=>{if(item.type==="AUDIO_ITEM"){const src=item.source_data||{};clips.push({id:item.id,name:item.name,startTime:item.start_bar*secondsPerBar,speed:1.0});}else if(item.type==="MIDI_ITEM"){const src=item.source_data||{};midiItems.push({id:item.id,name:item.name,parent_track_id:t.id,startTime:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,length_bars:item.duration_bars||4,notes:(src.notes||[]).map(n=>({id:n.id,pitch:n.pitch||60,start_beat:n.start_beat||0.0,duration_beats:n.duration_beats||1.0,velocity:n.velocity||0.8,pan:n.pan||0.0}))});}else if(item.type==="SECTION_ITEM"){const src=item.source_data||{};const secId=src.referenced_section_id;const secContainer=sectionStore?sectionStore[secId]:null;sections.push({id:item.id,name:item.name,start:item.start_bar*secondsPerBar,duration:item.duration_bars*secondsPerBar,length_bars:item.duration_bars||4,sectionId:secId,tracks:secContainer?deserializeTracksList(secContainer.tracks,secondsPerBar,sectionStore):null});}});return{id:t.id,name:t.name,volumeDb:t.volume_db||0.0,pan:t.pan||0.0,muted:t.mute||false,solo:t.solo||false,color:t.id==='1'?'#0f766e':'#1d4ed8',markers:[],serverFileId:t.items&&t.items.find(i=>i.type==="AUDIO_ITEM")?.source_data?.audio_file_url?.split("/").pop()||null,clips:clips,sections:sections,midiItems:midiItems,instrumentId:t.instrument_id||null,instrumentProgram:t.instrument_program!==null?t.instrument_program:undefined,instrumentName:t.instrument_name||null,instrument_source:t.instrument_source||null,soundfont_id:t.soundfont_id||null,soundfont_bank:t.soundfont_bank!==null?t.soundfont_bank:undefined,soundfont_program:t.soundfont_program!==null?t.soundfont_program:undefined,synth_engine:t.synth_engine||undefined};});};const serializeProjectToSchema=(projectId,name,bpmVal,tracksList,subTabsList,sessionTabsList)=>{const secondsPerBar=60.0/parseFloat(bpmVal||120)*4;const mainTracks=serializeTracksList(tracksList,secondsPerBar);const sectionStore={};// Helper: compute length_bars from tracks content
 const computeLengthBars=(tracksArr,spb)=>{let maxSec=0;(tracksArr||[]).forEach(tr=>{(tr.clips||[]).forEach(c=>{const end=(c.startTime||0)+(c.buffer?c.buffer.duration/(c.speed||1.0):4);if(end>maxSec)maxSec=end;});(tr.midiItems||[]).forEach(m=>{const end=(m.startTime||0)+(m.duration||4);if(end>maxSec)maxSec=end;});});return Math.ceil((maxSec||4)/spb);};// 1. Populate from sessionTabsList (open tabs)
 (sessionTabsList||[]).forEach(st=>{const serializedTracks=serializeTracksList(st.tracks,secondsPerBar);sectionStore[st.sectionId]={id:st.sectionId,name:st.name,is_root:false,length_bars:computeLengthBars(st.tracks,secondsPerBar),auto_compute_length:true,tracks:serializedTracks,color:st.color||null};});// 2. Also populate from tracksList (closed tabs saved inside Section items)
-const scanForSections=tracks=>{(tracks||[]).forEach(t=>{if(t.sections){t.sections.forEach(s=>{const secId=s.sectionId||s.id;if(s.tracks&&!sectionStore[secId]){sectionStore[secId]={id:secId,name:s.name,is_root:false,length_bars:computeLengthBars(s.tracks,secondsPerBar),auto_compute_length:true,tracks:serializeTracksList(s.tracks,secondsPerBar),color:s.color||null};}if(s.tracks){scanForSections(s.tracks);}});}});};scanForSections(tracksList);const subTabs=(subTabsList||[]).map(st=>{return{id:st.id,label:st.label,type:st.type,track_id:st.trackId,target_id:st.target_id,parent_tab_id:st.parent_tab_id,notes:st.notes||[],duration:st.duration||4,instrument_program:st.instrumentProgram,instrument_name:st.instrumentName,current_time:st.currentTime||0,color:st.color||null};});return{project_id:projectId||'proj_'+Date.now(),metadata:{title:name||"Dự án mới",bpm:parseFloat(bpmVal||120),time_signature_numerator:4,time_signature_denominator:4,sample_rate:44100},main_session:{id:"main",name:"MAIN SESSION",is_root:true,length_bars:(()=>{let maxBar=16.0;(mainTracks||[]).forEach(t=>{(t.items||[]).forEach(item=>{const end=(item.start_bar||0)+(item.duration_bars||4);if(end>maxBar)maxBar=end;});});return maxBar;})(),auto_compute_length:true,tracks:mainTracks},sub_tabs:subTabs,section_store:sectionStore};};const deserializeProjectFromSchema=schemaObj=>{const bpmVal=schemaObj.metadata?schemaObj.metadata.bpm:120;const secondsPerBar=60.0/bpmVal*4;const sectionStore=schemaObj.section_store||{};const restoredTracks=deserializeTracksList(schemaObj.main_session.tracks,secondsPerBar,sectionStore);const restoredSessionTabs=[];Object.keys(sectionStore).forEach(secId=>{const secContainer=sectionStore[secId];const secTracks=deserializeTracksList(secContainer.tracks,secondsPerBar,sectionStore);restoredSessionTabs.push({id:'session_'+secId,name:secContainer.name,sectionId:secId,tracks:secTracks,length_bars:secContainer.length_bars||16.0,auto_compute_length:secContainer.auto_compute_length!==undefined?secContainer.auto_compute_length:true,color:secContainer.color||null});});const restoredSubTabs=(schemaObj.sub_tabs||[]).map(st=>{return{id:st.id,label:st.label,type:st.type,trackId:st.track_id,target_id:st.target_id,parent_tab_id:st.parent_tab_id,notes:st.notes||[],duration:st.duration||4,instrumentProgram:st.instrument_program,instrumentName:st.instrument_name,currentTime:st.current_time||0,color:st.color||null};});return{bpm:bpmVal,tracks:restoredTracks,sessionTabs:restoredSessionTabs,subTabs:restoredSubTabs};};const App=()=>{// ── State Definitions ──
+const scanForSections=tracks=>{(tracks||[]).forEach(t=>{if(t.sections){t.sections.forEach(s=>{const secId=s.sectionId||s.id;if(s.tracks&&!sectionStore[secId]){sectionStore[secId]={id:secId,name:s.name,is_root:false,length_bars:computeLengthBars(s.tracks,secondsPerBar),auto_compute_length:true,tracks:serializeTracksList(s.tracks,secondsPerBar),color:s.color||null};}if(s.tracks){scanForSections(s.tracks);}});}});};scanForSections(tracksList);const subTabs=(subTabsList||[]).map(st=>{return{id:st.id,label:st.label,type:st.type,track_id:st.trackId,target_id:st.target_id,parent_tab_id:st.parent_tab_id,notes:st.notes||[],duration:st.duration||4,instrument_program:st.instrumentProgram,instrument_name:st.instrumentName,current_time:st.currentTime||0,color:st.color||null};});return{project_id:projectId||'proj_'+Date.now(),metadata:{title:name||"Dự án mới",bpm:parseFloat(bpmVal||120),time_signature_numerator:4,time_signature_denominator:4,sample_rate:44100},main_session:{id:"main",name:"MAIN SESSION",is_root:true,length_bars:(()=>{let maxBar=16.0;(mainTracks||[]).forEach(t=>{(t.items||[]).forEach(item=>{const end=(item.start_bar||0)+(item.duration_bars||4);if(end>maxBar)maxBar=end;});});return maxBar;})(),auto_compute_length:true,tracks:mainTracks},sub_tabs:subTabs,section_store:sectionStore};};const deserializeProjectFromSchema=schemaObj=>{const bpmVal=schemaObj.metadata?schemaObj.metadata.bpm:120;const secondsPerBar=60.0/bpmVal*4;const sectionStore=schemaObj.section_store||{};const restoredTracks=deserializeTracksList(schemaObj.main_session.tracks,secondsPerBar,sectionStore);const restoredSessionTabs=[];Object.keys(sectionStore).forEach(secId=>{const secContainer=sectionStore[secId];const secTracks=deserializeTracksList(secContainer.tracks,secondsPerBar,sectionStore);restoredSessionTabs.push({id:'session_'+secId,name:secContainer.name,sectionId:secId,tracks:secTracks,length_bars:secContainer.length_bars||16.0,auto_compute_length:secContainer.auto_compute_length!==undefined?secContainer.auto_compute_length:true,color:secContainer.color||null});});const restoredSubTabs=(schemaObj.sub_tabs||[]).map(st=>{return{id:st.id,label:st.label,type:st.type,trackId:st.track_id,target_id:st.target_id,parent_tab_id:st.parent_tab_id,notes:st.notes||[],duration:st.duration||4,instrumentProgram:st.instrument_program,instrumentName:st.instrument_name,currentTime:st.current_time||0,color:st.color||null};});return{bpm:bpmVal,tracks:restoredTracks,sessionTabs:restoredSessionTabs,subTabs:restoredSubTabs};};// ──────────────────────────────────────────────
+// MASTERING MODAL COMPONENT (from md/45_MASTERING_MODULE.md)
+// ──────────────────────────────────────────────
+const MasteringModal=({isOpen,onClose})=>{const[ozState,setOzState]=React.useState({activeModule:'eq',eqActive:true,imagerActive:true,maximizerActive:true,eqLowGain:1.5,eqMid1Gain:-1.0,eqMid2Gain:2.0,eqHighGain:1.8,w1:0,w2:15,w3:35,w4:50,maxGain:5.4,maxUpward:2.0,maxSoftClip:15,maxTransient:25,ceiling:-0.1,isBypassed:false});const[isPlaying,setIsPlaying]=React.useState(false);const[peakLevels,setPeakLevels]=React.useState({inPeak:0.05,outPeak:0.05});const audioRef=React.useRef({ctx:null,nodes:{},source:null});const eqCanvasRef=React.useRef(null);const imagerCanvasRef=React.useRef(null);const inMeterCanvasRef=React.useRef(null);const outMeterCanvasRef=React.useRef(null);const animFrameRef=React.useRef(null);const knobsInitializedRef=React.useRef(false);const ozStateRef=React.useRef(ozState);ozStateRef.current=ozState;function getAudioCtx(){if(audioRef.current.ctx)return audioRef.current.ctx;const ctx=window.SonicAudio&&window.SonicAudio.getAudioContext&&window.SonicAudio.getAudioContext()||new(window.AudioContext||window.webkitAudioContext)();audioRef.current.ctx=ctx;return ctx;}function initOzoneAudioEngine(){const ctx=getAudioCtx();const n=audioRef.current.nodes;if(n.inputAnalyser)return;n.inputAnalyser=ctx.createAnalyser();n.inputAnalyser.fftSize=2048;n.eqLowFilter=ctx.createBiquadFilter();n.eqLowFilter.type='lowshelf';n.eqLowFilter.frequency.value=100;n.eqMid1Filter=ctx.createBiquadFilter();n.eqMid1Filter.type='peaking';n.eqMid1Filter.frequency.value=822;n.eqMid1Filter.Q.value=0.7;n.eqMid2Filter=ctx.createBiquadFilter();n.eqMid2Filter.type='peaking';n.eqMid2Filter.frequency.value=3200;n.eqMid2Filter.Q.value=1.2;n.eqHighFilter=ctx.createBiquadFilter();n.eqHighFilter.type='highshelf';n.eqHighFilter.frequency.value=10000;n.maximizerBoostGain=ctx.createGain();n.maximizerCompressor=ctx.createDynamicsCompressor();n.maximizerCompressor.threshold.value=-0.1;n.maximizerCompressor.knee.value=0.0;n.maximizerCompressor.ratio.value=20.0;n.maximizerCompressor.attack.value=0.001;n.maximizerCompressor.release.value=0.05;n.outputAnalyser=ctx.createAnalyser();n.outputAnalyser.fftSize=2048;n.inputAnalyser.connect(n.eqLowFilter);n.eqLowFilter.connect(n.eqMid1Filter);n.eqMid1Filter.connect(n.eqMid2Filter);n.eqMid2Filter.connect(n.eqHighFilter);n.eqHighFilter.connect(n.maximizerBoostGain);n.maximizerBoostGain.connect(n.maximizerCompressor);n.maximizerCompressor.connect(n.outputAnalyser);n.outputAnalyser.connect(ctx.destination);updateAudioGraphValues();}function updateAudioGraphValues(){const n=audioRef.current.nodes;if(!n.eqLowFilter)return;const s=ozStateRef.current;const now=audioRef.current.ctx.currentTime;n.eqLowFilter.gain.setTargetAtTime(s.eqActive?s.eqLowGain:0,now,0.01);n.eqMid1Filter.gain.setTargetAtTime(s.eqActive?s.eqMid1Gain:0,now,0.01);n.eqMid2Filter.gain.setTargetAtTime(s.eqActive?s.eqMid2Gain:0,now,0.01);n.eqHighFilter.gain.setTargetAtTime(s.eqActive?s.eqHighGain:0,now,0.01);const boostLinear=s.maximizerActive?Math.pow(10,s.maxGain/20):1.0;n.maximizerBoostGain.gain.setTargetAtTime(boostLinear,now,0.01);}function startAudioDemo(){initOzoneAudioEngine();const ctx=audioRef.current.ctx;if(ctx.state==='suspended')ctx.resume();stopAudioDemo();const sampleRate=ctx.sampleRate;const bufferSize=sampleRate*4;const buffer=ctx.createBuffer(2,bufferSize,sampleRate);const left=buffer.getChannelData(0);const right=buffer.getChannelData(1);for(let i=0;i<bufferSize;i++){const t=i/sampleRate;const kickEnv=Math.max(0,1-t%0.5*8);const kick=Math.sin(2*Math.PI*(55*Math.exp(-(t%0.5)*18)))*kickEnv;const snareEnv=Math.max(0,1-(t+0.25)%0.5*6);const snare=(Math.random()*2-1)*snareEnv*0.3;const synth=(Math.sin(2*Math.PI*261.63*t)+Math.sin(2*Math.PI*311.13*t)+Math.sin(2*Math.PI*392.0*t))*0.12;left[i]=kick*0.6+snare+synth;right[i]=kick*0.6+snare*0.9+synth*0.95;}const source=ctx.createBufferSource();source.buffer=buffer;source.loop=true;source.connect(audioRef.current.nodes.inputAnalyser);source.start();audioRef.current.source=source;setIsPlaying(true);}function stopAudioDemo(){const src=audioRef.current.source;if(src){try{src.stop();}catch(e){}try{src.disconnect();}catch(e){}audioRef.current.source=null;}setIsPlaying(false);}React.useEffect(()=>{if(!isOpen)return;initOzoneAudioEngine();const n=audioRef.current.nodes;const eqCtxFn=()=>{const c=eqCanvasRef.current;return c?c.getContext('2d'):null;};const imagerCtxFn=()=>{const c=imagerCanvasRef.current;return c?c.getContext('2d'):null;};const inCtxFn=()=>{const c=inMeterCanvasRef.current;return c?c.getContext('2d'):null;};const outCtxFn=()=>{const c=outMeterCanvasRef.current;return c?c.getContext('2d'):null;};function resizeAll(){const resizeCanvas=ref=>{const el=ref.current;if(el){el.width=el.clientWidth;el.height=el.clientHeight;}};resizeCanvas(eqCanvasRef);resizeCanvas(imagerCanvasRef);resizeCanvas(inMeterCanvasRef);resizeCanvas(outMeterCanvasRef);}resizeAll();window.addEventListener('resize',resizeAll);const fftData=new Uint8Array(1024);function renderFrame(){animFrameRef.current=requestAnimationFrame(renderFrame);const s=ozStateRef.current;// EQ Spectrum
+const eqCanvas=eqCanvasRef.current;if(eqCanvas){const w=eqCanvas.width,h=eqCanvas.height;const eqCtx=eqCanvas.getContext('2d');eqCtx.clearRect(0,0,w,h);eqCtx.strokeStyle='rgba(51, 65, 85, 0.3)';eqCtx.lineWidth=1;eqCtx.font='9px JetBrains Mono';eqCtx.fillStyle='#475569';const freqs=[20,50,100,200,500,1000,2000,5000,10000,20000];freqs.forEach(f=>{const x=Math.log10(f/20)/Math.log10(20000/20)*w;eqCtx.beginPath();eqCtx.moveTo(x,0);eqCtx.lineTo(x,h);eqCtx.stroke();if(f>=1000)eqCtx.fillText(`${f/1000}k`,x+3,h-6);else eqCtx.fillText(`${f}`,x+3,h-6);});if(n.outputAnalyser&&isPlaying){n.outputAnalyser.getByteFrequencyData(fftData);eqCtx.fillStyle='rgba(56, 189, 248, 0.15)';const barWidth=w/128;for(let i=0;i<128;i++){const val=fftData[i*4]/255;eqCtx.fillRect(i*barWidth,h-val*h,barWidth-1,val*h);}}eqCtx.strokeStyle='#38bdf8';eqCtx.lineWidth=2.5;eqCtx.beginPath();for(let x=0;x<w;x++){const freq=20*Math.pow(20000/20,x/w);let gainDb=0;if(s.eqActive){gainDb+=s.eqLowGain/(1+Math.pow(freq/100,2));gainDb+=s.eqMid1Gain*Math.exp(-Math.pow(Math.log(freq/822),2)*2);gainDb+=s.eqMid2Gain*Math.exp(-Math.pow(Math.log(freq/3200),2)*2);gainDb+=s.eqHighGain/(1+Math.pow(10000/freq,2));}const y=h/2-gainDb/18*(h/2);if(x===0)eqCtx.moveTo(x,y);else eqCtx.lineTo(x,y);}eqCtx.stroke();}// Imager Vectorscope
+const imagerCanvas=imagerCanvasRef.current;if(imagerCanvas){const iw=imagerCanvas.width,ih=imagerCanvas.height;const ic=imagerCanvas.getContext('2d');ic.clearRect(0,0,iw,ih);ic.strokeStyle='rgba(51, 65, 85, 0.4)';ic.lineWidth=1;ic.beginPath();ic.arc(iw/2,ih/2,ih/3,0,Math.PI*2);ic.stroke();if(isPlaying){ic.fillStyle='#38bdf8';for(let i=0;i<40;i++){const angle=(Math.random()-0.5)*(Math.PI/2)+-Math.PI/2;const radius=Math.random()*(ih/3.2);const x=iw/2+Math.cos(angle)*radius*(1+s.w3/100);const y=ih/2+Math.sin(angle)*radius;ic.fillRect(x,y,2,2);}}}// I/O Meters
+const renderMeter=(ctxRef,level,textId)=>{const canvas=ctxRef.current;if(!canvas)return;const w=canvas.width,h=canvas.height;const ctx=canvas.getContext('2d');ctx.clearRect(0,0,w,h);const barH=level*h;const grad=ctx.createLinearGradient(0,h,0,0);grad.addColorStop(0,'#38bdf8');grad.addColorStop(0.7,'#f59e0b');grad.addColorStop(1,'#ef4444');ctx.fillStyle=grad;ctx.fillRect(2,h-barH,w-4,barH);const el=document.getElementById(textId);if(el)el.innerText=isPlaying?`${(20*Math.log10(level)).toFixed(1)} dB`:'-inf dB';};renderMeter(inMeterCanvasRef,isPlaying?0.55:0.05,'inPeakText');renderMeter(outMeterCanvasRef,isPlaying?0.85:0.05,'outPeakText');}renderFrame();// Knob setup
+if(!knobsInitializedRef.current){knobsInitializedRef.current=true;const container=document.getElementById('masteringModalBody');if(container){container.querySelectorAll('.knob-container').forEach(knob=>{let isDragging=false,startY=0,startVal=0;const param=knob.dataset.param;if(!param)return;const min=parseFloat(knob.dataset.min);const max=parseFloat(knob.dataset.max);const unit=knob.dataset.unit||'';const dial=knob.querySelector('.knob-dial');const valText=knob.querySelector('.knob-val');function updateUI(val){const pct=(val-min)/(max-min);const angle=-135+pct*270;if(dial)dial.style.transform=`rotate(${angle}deg)`;if(valText)valText.innerText=`${val>0&&unit==='dB'?'+':''}${val.toFixed(1)} ${unit}`;setOzState(prev=>({...prev,[param]:val}));}const startValParsed=parseFloat(knob.dataset.value);updateUI(startValParsed);knob.addEventListener('pointerdown',e=>{isDragging=true;startY=e.clientY;startVal=ozStateRef.current[param]!==undefined?ozStateRef.current[param]:startValParsed;knob.setPointerCapture(e.pointerId);});knob.addEventListener('pointermove',e=>{if(!isDragging)return;const deltaY=startY-e.clientY;let newVal=startVal+deltaY/100*(max-min);newVal=Math.min(max,Math.max(min,newVal));updateUI(newVal);});knob.addEventListener('pointerup',e=>{isDragging=false;knob.releasePointerCapture(e.pointerId);});knob.addEventListener('pointercancel',e=>{isDragging=false;knob.releasePointerCapture(e.pointerId);});});}}return()=>{window.removeEventListener('resize',resizeAll);if(animFrameRef.current)cancelAnimationFrame(animFrameRef.current);};},[isOpen]);React.useEffect(()=>{updateAudioGraphValues();},[ozState.eqLowGain,ozState.eqMid1Gain,ozState.eqMid2Gain,ozState.eqHighGain,ozState.maxGain,ozState.eqActive,ozState.maximizerActive]);React.useEffect(()=>{if(!isOpen){stopAudioDemo();knobsInitializedRef.current=false;}},[isOpen]);if(!isOpen)return null;const switchModule=name=>setOzState(prev=>({...prev,activeModule:name}));const bandKnob=(param,min,max,val,unit,label,freq,color,filterType)=>/*#__PURE__*/React.createElement("div",{className:"bg-slate-900/80 border border-slate-800 p-2.5 rounded-lg flex 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Maximizer"),/*#__PURE__*/React.createElement("option",{value:"wide_space"},"Cinematic Stereo Expansion"),/*#__PURE__*/React.createElement("option",{value:"transparent"},"Transparent High-Clarity Limiter")))),/*#__PURE__*/React.createElement("div",{className:"flex items-center gap-3 text-xs oz-font-mono"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400 text-[11px]"},"Target LUFS:"),/*#__PURE__*/React.createElement("span",{className:"text-cyan-400 font-bold bg-slate-950 border border-cyan-900/60 px-2 py-0.5 rounded"},"-11.0 LUFS"),/*#__PURE__*/React.createElement("button",{onClick:onClose,className:"text-slate-500 hover:text-slate-300 ml-2"},/*#__PURE__*/React.createElement("i",{"data-lucide":"x",className:"w-4 h-4"})))),/*#__PURE__*/React.createElement("div",{className:"h-16 bg-slate-950 border-b border-slate-800 px-4 flex items-center gap-2 overflow-x-auto shrink-0 oz-scrollbar"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-500 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rounded-xl flex flex-col justify-between"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-slate-300 uppercase oz-font-mono"},"4-Band Stereo Width"),/*#__PURE__*/React.createElement("div",{className:"space-y-3 my-auto"},[{id:'w1',label:'Band 1 (0-100Hz)',color:'#22d3ee',val:ozState.w1},{id:'w2',label:'Band 2 (100-1kHz)',color:'#fbbf24',val:ozState.w2},{id:'w3',label:'Band 3 (1k-6kHz)',color:'#a855f7',val:ozState.w3},{id:'w4',label:'Band 4 (6k-20kHz)',color:'#34d399',val:ozState.w4}].map(b=>/*#__PURE__*/React.createElement("div",{key:b.id},/*#__PURE__*/React.createElement("div",{className:"flex justify-between text-[11px] font-mono 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my-2","data-param":"maxGain","data-min":"0","data-max":"12","data-value":"5.4","data-unit":"dB"},/*#__PURE__*/React.createElement("div",{className:"knob-dial w-24 h-24 rounded-full bg-slate-900 border-4 border-cyan-500 relative flex items-center justify-center shadow-2xl"},/*#__PURE__*/React.createElement("div",{className:"knob-pointer w-1 h-8 bg-cyan-400 rounded absolute top-2"}),/*#__PURE__*/React.createElement("span",{className:"knob-val text-sm font-bold oz-font-mono text-cyan-300 z-10"},"+5.4 dB"))),/*#__PURE__*/React.createElement("div",{className:"w-full mt-4 bg-slate-950 p-2 rounded-lg border border-slate-800 text-xs oz-font-mono flex justify-between items-center"},/*#__PURE__*/React.createElement("span",{className:"text-slate-400"},"Ceiling Level:"),/*#__PURE__*/React.createElement("span",{className:"text-cyan-400 font-bold"},ozState.ceiling.toFixed(2)," dB"))),/*#__PURE__*/React.createElement("div",{className:"col-span-8 grid grid-cols-3 gap-4"},/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-400 oz-font-mono mb-2"},"UPWARD COMPRESS"),/*#__PURE__*/React.createElement("div",{className:"knob-container","data-param":"maxUpward","data-min":"0","data-max":"10","data-value":"2.0","data-unit":"dB"},/*#__PURE__*/React.createElement("div",{className:"knob-dial w-12 h-12 rounded-full bg-slate-800 border-2 border-cyan-500 relative flex items-center justify-center"},/*#__PURE__*/React.createElement("div",{className:"knob-pointer w-0.5 h-4 bg-cyan-400 rounded absolute top-1"}))),/*#__PURE__*/React.createElement("span",{className:"knob-val text-xs font-mono text-slate-200 mt-2"},"+2.0 dB")),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-400 oz-font-mono mb-2"},"SOFT CLIPPER"),/*#__PURE__*/React.createElement("div",{className:"knob-container","data-param":"maxSoftClip","data-min":"0","data-max":"100","data-value":"15","data-unit":"%"},/*#__PURE__*/React.createElement("div",{className:"knob-dial w-12 h-12 rounded-full bg-slate-800 border-2 border-amber-500 relative flex items-center justify-center"},/*#__PURE__*/React.createElement("div",{className:"knob-pointer w-0.5 h-4 bg-amber-400 rounded absolute top-1"}))),/*#__PURE__*/React.createElement("span",{className:"knob-val text-xs font-mono text-slate-200 mt-2"},"15%")),/*#__PURE__*/React.createElement("div",{className:"bg-slate-950 p-3 border border-slate-800 rounded-xl flex flex-col items-center"},/*#__PURE__*/React.createElement("span",{className:"text-[10px] font-bold text-slate-400 oz-font-mono mb-2"},"TRANSIENT EMPHASIS"),/*#__PURE__*/React.createElement("div",{className:"knob-container","data-param":"maxTransient","data-min":"0","data-max":"100","data-value":"25","data-unit":"%"},/*#__PURE__*/React.createElement("div",{className:"knob-dial w-12 h-12 rounded-full bg-slate-800 border-2 border-emerald-500 relative flex items-center justify-center"},/*#__PURE__*/React.createElement("div",{className:"knob-pointer w-0.5 h-4 bg-emerald-400 rounded absolute top-1"}))),/*#__PURE__*/React.createElement("span",{className:"knob-val text-xs font-mono text-slate-200 mt-2"},"25%")))))),/*#__PURE__*/React.createElement("div",{className:"w-64 bg-slate-900 border-l border-slate-800/80 p-3 flex flex-col justify-between shadow-2xl oz-font-mono text-xs z-20 shrink-0"},/*#__PURE__*/React.createElement("div",{className:"flex items-center justify-between border-b border-slate-800 pb-2 mb-2"},/*#__PURE__*/React.createElement("span",{className:"text-xs font-bold text-white tracking-wider uppercase flex items-center 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oz-font-mono"},"-inf dB"))),/*#__PURE__*/React.createElement("div",{className:"flex-1 bg-slate-950 border border-slate-800/90 rounded-xl p-2 flex justify-around relative overflow-hidden my-1"},/*#__PURE__*/React.createElement("div",{className:"flex flex-col items-center h-full"},/*#__PURE__*/React.createElement("span",{className:"text-[9px] text-slate-500 mb-1"},"IN"),/*#__PURE__*/React.createElement("div",{className:"flex-1 w-5 bg-slate-900 border border-slate-800 rounded relative overflow-hidden flex items-end"},/*#__PURE__*/React.createElement("canvas",{ref:inMeterCanvasRef,className:"w-full h-full block"}))),/*#__PURE__*/React.createElement("div",{className:"flex flex-col items-center h-full"},/*#__PURE__*/React.createElement("span",{className:"text-[9px] text-slate-500 mb-1"},"OUT"),/*#__PURE__*/React.createElement("div",{className:"flex-1 w-6 bg-slate-900 border border-slate-800 rounded relative overflow-hidden flex items-end"},/*#__PURE__*/React.createElement("canvas",{ref:outMeterCanvasRef,className:"w-full h-full block"})))),/*#__PURE__*/React.createElement("div",{className:"grid grid-cols-2 gap-1.5 mt-2"},/*#__PURE__*/React.createElement("button",{onClick:()=>setOzState(prev=>({...prev,isBypassed:!prev.isBypassed})),className:`py-1.5 rounded text-[10px] font-bold border transition-colors ${ozState.isBypassed?'bg-cyan-600 border-cyan-500 text-white':'bg-slate-800 hover:bg-slate-700 text-slate-200 border-slate-700'}`},"Bypass"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-200 py-1.5 rounded text-[10px] font-bold border border-slate-700 transition-colors"},"Gain Match"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Codec"),/*#__PURE__*/React.createElement("button",{className:"bg-slate-800 hover:bg-slate-700 text-slate-300 py-1.5 rounded text-[10px] border border-slate-700"},"Dither"))))));};const App=()=>{// ── State Definitions ──
 const[tracks,setTracks]=useState([{id:'1',name:'Track 01',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#0f766e',markers:[],serverFileId:null,clips:[],sections:[],midiItems:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}},{id:'2',name:'Track 02',buffer:null,startTime:0,volumeDb:0,pan:0,muted:false,solo:false,color:'#1d4ed8',markers:[],serverFileId:null,clips:[],sections:[],midiItems:[],isArmed:false,monitoringEnabled:true,inputSource:{deviceType:'NONE',deviceId:''}}]);const[appWarningModal,setAppWarningModal]=useState(null);const[bpm,setBpm]=useState(localStorage.getItem('studio_bpm')||'120');const prevBpmRef=useRef(bpm);const[draggedClip,setDraggedClip]=useState(null);const[hoveredTrackId,setHoveredTrackId]=useState(null);// Recalculate item/section/selection durations when BPM changes
 useEffect(()=>{const oldSpb=prevBpmRef.current?60.0/parseFloat(prevBpmRef.current)*4:null;const bpmVal=parseFloat(bpm)||120;const secondsPerBar=60.0/bpmVal*4;// Recalculate range loop selection to maintain bar count (tempo mode only)
 if(oldSpb&&selectionFollowsTempo&&selectionStart!==null&&selectionEnd!==null&&selectionEnd>selectionStart){const startBar=selectionStart/oldSpb;const endBar=selectionEnd/oldSpb;if(endBar-startBar>0.01){setSelectionStart(startBar*secondsPerBar);setSelectionEnd(endBar*secondsPerBar);}}prevBpmRef.current=bpm;// Force canvas redraw
@@ -222,7 +229,7 @@ const handleSetTabColor=(tabId,tabType,color)=>{if(tabType==='session'){setSessi
 const[tempTabActive,setTempTabActive]=useState(false);const[tempTabBuffer,setTempTabBuffer]=useState(null);const[tempTabTrackId,setTempTabTrackId]=useState(null);const[tempTabOrigStart,setTempTabOrigStart]=useState(0);const[tempTabOrigEnd,setTempTabOrigEnd]=useState(0);const tempTabCanvasRef=useRef(null);// Effect parameters for temp tab
 const[tempTabEffects,setTempTabEffects]=useState({reverse:false,gainDb:0,fadeInMs:0,fadeOutMs:0});// ── Auth / User State ──
 const[currentUser,setCurrentUser]=useState(null);const[authModalOpen,setAuthModalOpen]=useState(false);const[authMode,setAuthMode]=useState('login');// 'login' | 'register' | 'force_change'
-const[isMandatoryLogin,setIsMandatoryLogin]=useState(false);const[profileModalOpen,setProfileModalOpen]=useState(false);const[systemManagerModalOpen,setSystemManagerModalOpen]=useState(false);const[aiConfigModalOpen,setAiConfigModalOpen]=useState(false);const[aiPresetModalOpen,setAiPresetModalOpen]=useState(false);const[aiPresetVersion,setAiPresetVersion]=useState(0);const[pluginManagerModalOpen,setPluginManagerModalOpen]=useState(false);const[pluginsData,setPluginsData]=useState(null);useEffect(()=>{const checkAuthStatus=async()=>{const savedToken=localStorage.getItem('sonic_token');if(!savedToken){setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);return;}try{const profile=await window.SonicAPI.getProfile();setCurrentUser(profile);localStorage.setItem('sonic_user',JSON.stringify(profile));if(profile.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);}}catch(err){const cached=localStorage.getItem('sonic_user');if(cached){try{setCurrentUser(JSON.parse(cached));}catch(_){}setIsMandatoryLogin(false);setAuthModalOpen(false);}else{localStorage.removeItem('sonic_token');localStorage.removeItem('sonic_user');setCurrentUser(null);setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);}}};checkAuthStatus();},[]);const loadPendingSfsProject=()=>{const proj=window.__pendingSfsProject;if(!proj)return;try{let restoredTracks=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(proj.main_session){const result=deserializeProjectFromSchema(proj);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;}else{restoredTracks=(proj.tracks||[]).map(t=>{const{height:_h,...rest}=t;return{...rest,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null};});}if(restoredTracks.length>0){setTracks(restoredTracks);setBpm(restoredBpm.toString());if(restoredSessionTabs.length>0){setSessionTabs(restoredSessionTabs);}if(restoredSubTabs.length>0){setSubTabs(restoredSubTabs);}showToast(`Đã tải dự án "${proj.metadata?.title||proj.name||'Dự án mới'}" từ liên kết .sfs thành công!`,"success");}}catch(e){showToast("Lỗi tải dự án từ .sfs","error");}finally{window.__pendingSfsProject=null;}};const handleAuthSuccess=user=>{setCurrentUser(user);if(user.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);loadPendingSfsProject();const loadPrefs=p=>{if(!p)return;if(p.showAIPanel!==undefined)setShowAIPanel(p.showAIPanel);if(p.showExportPanel!==undefined)setShowExportPanel(p.showExportPanel);if(p.showSelectionPanel!==undefined)setShowSelectionPanel(p.showSelectionPanel);if(p.showPythonToolsPanel!==undefined)setShowPythonToolsPanel(p.showPythonToolsPanel);if(p.showMediaExplorer!==undefined)setShowMediaExplorer(p.showMediaExplorer);if(p.showFxRack!==undefined)setShowFxRack(p.showFxRack);if(p.showMidiEvents!==undefined)setShowMidiEvents(p.showMidiEvents);if(p.panelPositions)setPanelPositions(p.panelPositions);if(p.rightSidebarWidth)setRightSidebarWidth(p.rightSidebarWidth);if(p.mediaExplorerHeight)setMediaExplorerHeight(p.mediaExplorerHeight);if(p.selectedProviderId)setSelectedProviderId(p.selectedProviderId);};(async()=>{try{const data=await window.SonicAPI.getPreferences();if(data&&data.preferences)loadPrefs(data.preferences);else{const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}}catch(e){const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}try{const data=await window.SonicAPI.getAIConfigs();if(data&&data.providers){setAiProviders(data.providers);const active=data.providers.find(p=>p.is_active)||data.providers[0];if(active)setSelectedProviderId(active.id);}}catch(e){}try{window.SonicAPI.getSoundfontCatalog().then(cat=>{window.__soundfontCatalog=cat;}).catch(()=>{});}catch(e){}// Re-fetch instrument data after auth (useEffect on mount runs before token is set)
+const[isMandatoryLogin,setIsMandatoryLogin]=useState(false);const[profileModalOpen,setProfileModalOpen]=useState(false);const[systemManagerModalOpen,setSystemManagerModalOpen]=useState(false);const[aiConfigModalOpen,setAiConfigModalOpen]=useState(false);const[aiPresetModalOpen,setAiPresetModalOpen]=useState(false);const[aiPresetVersion,setAiPresetVersion]=useState(0);const[showMasteringModal,setShowMasteringModal]=useState(false);const[pluginManagerModalOpen,setPluginManagerModalOpen]=useState(false);const[pluginsData,setPluginsData]=useState(null);useEffect(()=>{const checkAuthStatus=async()=>{const savedToken=localStorage.getItem('sonic_token');if(!savedToken){setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);return;}try{const profile=await window.SonicAPI.getProfile();setCurrentUser(profile);localStorage.setItem('sonic_user',JSON.stringify(profile));if(profile.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);}}catch(err){const cached=localStorage.getItem('sonic_user');if(cached){try{setCurrentUser(JSON.parse(cached));}catch(_){}setIsMandatoryLogin(false);setAuthModalOpen(false);}else{localStorage.removeItem('sonic_token');localStorage.removeItem('sonic_user');setCurrentUser(null);setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);}}};checkAuthStatus();},[]);const loadPendingSfsProject=()=>{const proj=window.__pendingSfsProject;if(!proj)return;try{let restoredTracks=[];let restoredBpm=bpm;let restoredSessionTabs=[];let restoredSubTabs=[];if(proj.main_session){const result=deserializeProjectFromSchema(proj);restoredTracks=result.tracks;restoredBpm=result.bpm;restoredSessionTabs=result.sessionTabs;restoredSubTabs=result.subTabs;}else{restoredTracks=(proj.tracks||[]).map(t=>{const{height:_h,...rest}=t;return{...rest,buffer:null,channelInfo:t.channelInfo||null,clips:t.clips||[],serverFileId:t.serverFileId||null};});}if(restoredTracks.length>0){setTracks(restoredTracks);setBpm(restoredBpm.toString());if(restoredSessionTabs.length>0){setSessionTabs(restoredSessionTabs);}if(restoredSubTabs.length>0){setSubTabs(restoredSubTabs);}showToast(`Đã tải dự án "${proj.metadata?.title||proj.name||'Dự án mới'}" từ liên kết .sfs thành công!`,"success");}}catch(e){showToast("Lỗi tải dự án từ .sfs","error");}finally{window.__pendingSfsProject=null;}};const handleAuthSuccess=user=>{setCurrentUser(user);if(user.must_change_password){setIsMandatoryLogin(true);setAuthMode('force_change');setAuthModalOpen(true);}else{setIsMandatoryLogin(false);setAuthModalOpen(false);loadPendingSfsProject();const loadPrefs=p=>{if(!p)return;if(p.showAIPanel!==undefined)setShowAIPanel(p.showAIPanel);if(p.showExportPanel!==undefined)setShowExportPanel(p.showExportPanel);if(p.showSelectionPanel!==undefined)setShowSelectionPanel(p.showSelectionPanel);if(p.showPythonToolsPanel!==undefined)setShowPythonToolsPanel(p.showPythonToolsPanel);if(p.showMediaExplorer!==undefined)setShowMediaExplorer(p.showMediaExplorer);if(p.showFxRack!==undefined)setShowFxRack(p.showFxRack);if(p.showMidiEvents!==undefined)setShowMidiEvents(p.showMidiEvents);if(p.panelPositions)setPanelPositions(p.panelPositions);if(p.rightSidebarWidth)setRightSidebarWidth(p.rightSidebarWidth);if(p.mediaExplorerHeight)setMediaExplorerHeight(p.mediaExplorerHeight);if(p.selectedProviderId)setSelectedProviderId(p.selectedProviderId);};(async()=>{try{const data=await window.SonicAPI.getPreferences();if(data&&data.preferences)loadPrefs(data.preferences);else{const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}}catch(e){const cached=localStorage.getItem('sonic_preferences');if(cached)loadPrefs(JSON.parse(cached));}try{const data=await window.SonicAPI.getAIConfigs();if(data&&data.providers){setAiProviders(data.providers);const active=data.providers.find(p=>p.is_active)||data.providers[0];if(active)setSelectedProviderId(active.id);}}catch(e){}try{window.SonicAPI.getSoundfontCatalog().then(cat=>{window.__soundfontCatalog=cat;}).catch(()=>{});}catch(e){}// Re-fetch instrument data after auth (useEffect on mount runs before token is set)
 try{window.SonicAPI.listPlugins().then(async data=>{try{const catResp=(await window.SonicAPI.getSoundfontCatalog?.())??(await fetch('/api/v1/plugins/soundfonts/catalog').then(r=>r.json()));const catalog=catResp.full_catalog||{};data.soundfonts=(data.soundfonts||[]).map(sf=>{const sfId=sf.id.replace('sf_','');const catEntry=catalog[sfId.toLowerCase()]||catalog[sfId];if(catEntry&&catEntry.instruments)return{...sf,presets:catEntry.instruments};return sf;});}catch(e){console.warn('Catalog fetch error:',e);}setInstrumentSelectorData(data);}).catch(()=>{});}catch(e){}})();}};const handleLogout=()=>{localStorage.removeItem('sonic_token');localStorage.removeItem('sonic_user');setCurrentUser(null);setIsMandatoryLogin(true);setAuthMode('login');setAuthModalOpen(true);};// ── Temp project auto-save (local + server) ──
 useEffect(()=>{const serializeSafe=arr=>(arr||[]).map(t=>({id:t.id,name:t.name,startTime:t.startTime,height:t.height,volumeDb:t.volumeDb,pan:t.pan,muted:t.muted,solo:t.solo,color:t.color,markers:t.markers||[],serverFileId:t.serverFileId||null,channelInfo:t.channelInfo?{channels:t.channelInfo.channels,isStereo:t.channelInfo.isStereo,label:t.channelInfo.label}:null}));window.SonicStorage.scheduleTempAutoSave(()=>{return serializeProjectToSchema(currentProjectId||'temp_project',projectName||'Dự án tạm chưa lưu',bpm,tracks,subTabs,sessionTabs);});},[tracks,subTabs,sessionTabs]);// Lucide icons initialization
 useEffect(()=>{setTimeout(()=>{if(window.lucide){window.lucide.createIcons();}},50);},[activeTool,activeTab,contextMenu]);const timelineWrapperRef=useRef(null);const[timelineWrapperNode,setTimelineWrapperNode]=useState(null);const handleTimelineWrapperRef=useCallback(node=>{timelineWrapperRef.current=node;setTimelineWrapperNode(node);},[]);const tcpContainerRef=useRef(null);const[scrollLeft,setScrollLeft]=useState(0);const handleTimelineScroll=e=>{if(tcpContainerRef.current){tcpContainerRef.current.scrollTop=e.currentTarget.scrollTop;}setScrollLeft(e.currentTarget.scrollLeft);};const handleTCPScroll=e=>{if(timelineWrapperRef.current){timelineWrapperRef.current.scrollTop=e.currentTarget.scrollTop;}};const panelDropZoneRef=useRef(null);const startPanelDrag=(panelId,e)=>{panelDragRef.current={panelId,startX:e.clientX,startY:e.clientY};setPanelDropZone(null);setDragGhostPanel(panelId);setDragGhostPos({x:e.clientX-120,y:e.clientY-20});const onMove=ev=>{if(!panelDragRef.current||!workspaceRef.current)return;const rect=workspaceRef.current.getBoundingClientRect();const x=ev.clientX-rect.left;const y=ev.clientY-rect.top;const w=rect.width;const h=rect.height;const margin=60;let zone=null;if(x<margin&&x>10)zone='left';else if(x>w-margin&&x<w-10)zone='right';else if(y<margin&&y>10)zone='top';else if(y>h-margin&&y<h-10)zone='bottom';panelDropZoneRef.current=zone;setPanelDropZone(zone);setDragGhostPos({x:ev.clientX-120,y:ev.clientY-20});};const onUp=()=>{if(panelDragRef.current){const pid=panelDragRef.current.panelId;const targetZone=panelDropZoneRef.current;if(targetZone&&targetZone!==panelPositions[pid]){setPanelPositions(prev=>({...prev,[pid]:targetZone}));}panelDragRef.current=null;panelDropZoneRef.current=null;setPanelDropZone(null);setDragGhostPos(null);setDragGhostPanel(null);}document.removeEventListener('mousemove',onMove);document.removeEventListener('mouseup',onUp);};document.addEventListener('mousemove',onMove);document.addEventListener('mouseup',onUp);};// ── Right Sidebar Column Resizer ──
@@ -424,8 +431,8 @@ useEffect(()=>{if(typeof window.DAWCommandDispatcher==='undefined')return;const
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text-zinc-500 py-2"},"Loading instruments...")):sfPresets.length>0?sfPresets.filter(p=>!selectedSoundFontId||p._sfId===selectedSoundFontId).filter(p=>!sfPresetSearchQuery||(p.name||'').toLowerCase().includes(sfPresetSearchQuery.toLowerCase())||(p._sfName||'').toLowerCase().includes(sfPresetSearchQuery.toLowerCase())).map((p,i)=>/*#__PURE__*/React.createElement("button",{key:i,onClick:()=>setTrackInstrumentWithUndo(instrumentSelectorTrackId,p._sfId,p.name||'Preset '+p.program,p.bank,p.program),className:"w-full text-left px-3 py-2 text-sm rounded bg-zinc-800/60 hover:bg-amber-800 text-zinc-300 truncate flex items-center gap-2"},/*#__PURE__*/React.createElement("span",{className:"text-xs text-zinc-500 shrink-0"},p._sfDisplay),p.bank===128?/*#__PURE__*/React.createElement("span",{className:"mr-1"},"🥁"):null,p.name||'Preset '+p.program)):(/*#__PURE__*/React.createElement("p",{className:"text-sm text-zinc-500 py-2"},sfPresetSearchQuery?"Kh\u00f4ng t\u00ecm th\u1ea5y nh\u1ea1c c\u1ee5 ph\u00f9 h\u1ee3p.":"No presets found.")))))),fxSelectorTrackId&&/*#__PURE__*/React.createElement("div",{className:"fixed inset-0 z-50 flex items-center justify-center bg-black/60 backdrop-blur-sm",onClick:()=>setFxSelectorTrackId(null)},/*#__PURE__*/React.createElement("div",{className:"bg-[#262626] border border-[#383838] rounded-xl shadow-2xl w-64 p-4 text-slate-200",onClick:e=>e.stopPropagation()},/*#__PURE__*/React.createElement("h3",{className:"text-sm font-bold text-purple-400 mb-3"},"Track FX"),/*#__PURE__*/React.createElement("div",{className:"space-y-1"},/*#__PURE__*/React.createElement("button",{onClick:()=>handleSetTrackFx(fxSelectorTrackId,null),className:"w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-zinc-700 text-zinc-400"},"None"),/*#__PURE__*/React.createElement("button",{onClick:()=>handleSetTrackFx(fxSelectorTrackId,'chorus'),className:"w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-cyan-800 text-cyan-300"},"Chorus"),/*#__PURE__*/React.createElement("button",{onClick:()=>handleSetTrackFx(fxSelectorTrackId,'reverb'),className:"w-full text-left px-3 py-2 text-xs rounded bg-zinc-800 hover:bg-purple-800 text-purple-300"},"Reverb")))),instrumentDropdownTrackId&&instrumentDropdownBtnRect&&/*#__PURE__*/React.createElement("div",{"data-instr-dropdown":"",className:"fixed z-[100] bg-[#1e1e1e] border border-zinc-700 rounded shadow-xl w-[220px] max-h-[300px] flex flex-col",style:{top:instrumentDropdownBtnRect.bottom+4,left:Math.max(4,Math.min(instrumentDropdownBtnRect.left,window.innerWidth-224))}},/*#__PURE__*/React.createElement("input",{type:"text",placeholder:"T\u00ecm nh\u1ea1c c\u1ee5...",value:instrumentSearchQuery,onChange:e=>setInstrumentSearchQuery(e.target.value),autoFocus:true,className:"w-full bg-black border-b border-zinc-700 px-2 py-1.5 text-xs outline-none"}),/*#__PURE__*/React.createElement("div",{className:"flex-1 overflow-y-auto"},/*#__PURE__*/React.createElement("button",{onClick:()=>setTrackInstrumentWithUndo(instrumentDropdownTrackId,null),className:"w-full text-left px-3 py-1.5 text-xs bg-zinc-800 hover:bg-zinc-700 text-zinc-400"},"None (Default Synth)"),filteredInstruments.soundfonts.length>0&&/*#__PURE__*/React.createElement("div",{className:"text-[10px] text-zinc-500 px-3 py-1 mt-1 uppercase font-bold"},"SoundFonts"),filteredInstruments.soundfonts.map((sf,i)=>/*#__PURE__*/React.createElement("button",{key:"sfd_"+i,onClick:()=>{setInstrumentDropdownTrackId(null);setInstrumentDropdownBtnRect(null);setTrackInstrumentWithUndo(instrumentDropdownTrackId,"sf_"+sf.id,sf.display||sf.name||sf.id,undefined,undefined);},className:"w-full text-left px-3 py-1.5 text-xs bg-zinc-800 hover:bg-amber-800 text-zinc-200 flex items-center justify-between"},/*#__PURE__*/React.createElement("span",{className:"truncate"},sf.display||sf.name||sf.id),/*#__PURE__*/React.createElement("span",{className:"text-[10px] 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diff --git a/app/storage/sonicforge.db b/app/storage/sonicforge.db
index 20a62e719559d24bcc45f5cc18dd776f9f3a30a6..61681e60c73750d89e0ee391057d2836489d5404 100644
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diff --git a/app/templates/index.html b/app/templates/index.html
index ff13627..b1f2737 100644
--- a/app/templates/index.html
+++ b/app/templates/index.html
@@ -242,6 +242,32 @@
         svg, i[data-lucide] {
             pointer-events: none;
         }
+
+        /* Ozone Mastering Module Styles */
+        .oz-panel {
+            background: linear-gradient(180deg, #131822 0%, #0d1118 100%);
+            border: 1px solid rgba(255, 255, 255, 0.07);
+        }
+        .oz-card {
+            background: #18202c;
+            border: 1px solid rgba(255, 255, 255, 0.1);
+            transition: all 0.15s ease;
+        }
+        .oz-card-active {
+            background: #1e2a3a;
+            border-color: #38bdf8;
+            box-shadow: 0 0 12px rgba(56, 189, 248, 0.2);
+        }
+        .knob-container { touch-action: none; user-select: none; }
+        .knob-dial {
+            transition: transform 0.05s ease-out;
+            box-shadow: inset 0 1px 3px rgba(255,255,255,0.15), 0 3px 8px rgba(0,0,0,0.8);
+        }
+        .oz-scrollbar::-webkit-scrollbar { width: 4px; height: 4px; }
+        .oz-scrollbar::-webkit-scrollbar-track { background: #080b12; }
+        .oz-scrollbar::-webkit-scrollbar-thumb { background: #1e293b; border-radius: 2px; }
+        .oz-scrollbar::-webkit-scrollbar-thumb:hover { background: #334155; }
+        .oz-font-mono { font-family: 'JetBrains Mono', monospace; }
     </style>
 </head>