refactor(mq_editor): consolidate duplicates, extract utils.js and app.js

- utils.js (new): evalBezier (robust), getCanvasCoords, buildBandPoints
- app.js (new): extract ~450-line inline script from index.html
- editor.js: generalize _makeJogSlider(inp, options) with onUpdate cb,
  eliminate 50-line inline resonator jog duplication, use getCanvasCoords
- mq_extract.js: extract findBestPeak(), replace two identical loop bodies
- viewer.js: remove duplicate evalBezier, use getCanvasCoords/buildBandPoints
- mq_synth.js: remove duplicate evalBezier
- index.html: inline script removed, load order: utils→fft→extract→synth→viewer→editor→app

handoff(Claude): mq_editor refactor complete — no logic changes, browser-ready.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

1 files changed, 9 insertions, 0 deletions

diff --git a/doc/COMPLETED.md b/doc/COMPLETED.md
index 3e02c40..1fb51f5 100644
--- a/doc/COMPLETED.md
+++ b/doc/COMPLETED.md
@@ -557,6 +557,15 @@ Use `read @doc/archive/FILENAME.md` to access archived documents.
 - **Task #39: Visual Debugging System**: Implemented a comprehensive set of wireframe primitives (Sphere, Cone, Cross, Line, Trajectory) in `VisualDebug`. Updated `test_3d_render` to demonstrate usage.
 - **Task #68: Mesh Wireframe Rendering**: Added `add_mesh_wireframe` to `VisualDebug` to visualize triangle edges for mesh objects. Integrated into `Renderer3D` debug path and `test_mesh` tool.
 
+#### mq_editor Refactoring (February 18, 2026)
+- **`utils.js`** (new): consolidated `evalBezier` (robust dt≤0 guard), `getCanvasCoords`, `buildBandPoints` — loaded first.
+- **`app.js`** (new): extracted ~450-line inline `<script>` from `index.html`.
+- **`editor.js`**: generalized `_makeJogSlider(inp, options)` with `onUpdate` callback; eliminated 50-line resonator jog duplication; uses `getCanvasCoords`.
+- **`mq_extract.js`**: extracted `findBestPeak`, replacing two identical loop bodies.
+- **`viewer.js`**: removed duplicate `evalBezier`; uses `getCanvasCoords` and `buildBandPoints`.
+- **`mq_synth.js`**: removed duplicate `evalBezier`.
+- **`index.html`**: inline script removed; load order: `utils.js` → fft → mq_extract → mq_synth → viewer → editor → `app.js`.
+
 #### CNN v2 Training Pipeline Improvements (February 14, 2026) 🎯
 - **Critical Training Fixes**: Resolved checkpoint saving and argument handling bugs in CNN v2 training pipeline. **Bug 1 (Missing Checkpoints)**: Training completed successfully but no checkpoint saved when `epochs < checkpoint_every` interval. Solution: Always save final checkpoint after training completes, regardless of interval settings. **Bug 2 (Stale Checkpoints)**: Old checkpoint files from previous runs with different parameters weren't overwritten due to `if not exists` check. Solution: Remove existence check, always overwrite final checkpoint. **Bug 3 (Ignored num_layers)**: When providing comma-separated kernel sizes (e.g., `--kernel-sizes 3,1,3`), the `--num-layers` parameter was used only for validation but not derived from list length. Solution: Derive `num_layers` from kernel_sizes list length when multiple values provided. **Bug 4 (Argument Passing)**: Shell script passed unquoted variables to Python, potentially causing parsing issues with special characters. Solution: Quote all shell variables when passing to Python scripts.