Fix: double/triple preview sound on marker click

Fix: suppress preview sound on non-intentional note selection

Fix: piano sound on first click (load sample on-demand)

Tutorial: fix tooltip overlapping highlighted element

Tutorial: revert to 8 steps, add free-glyphs (후보기호) step

Tutorial: 3x larger panels/text, add 5 more tour steps

Add interactive tutorial tour for corrector

Play piano preview sound on marker/note click

Fix orphan editing, voice merge, 1/32 snap, rest drag bugs

UI redesign Phase 0-6 + functional fixes

Fix OMR editing bugs + add tokens.css + UI improvements

Fix multi-select bugs + add score rubber-band drag selection

Add multi-select to score markers (Ctrl+Click, keyboard batch edit)

Replace chord auto-sync with multi-select in Timeline

Add change_duration and toggle_dot to OMR edits

Warn on XML download if OMR edits are unapplied

Fix Apply to OMR resetting all edits — preserve noteInfos instead of rebuild

Enlarge accidental labels and refresh timeline on note edits

Rename free glyphs button to 후보 기호 표시 and enlarge styling

Add barline/stack/layout debug logging to page load

Add page-load debug logging for OMR coordinate diagnosis

Add conversion progress indicator (SSE) and fix OMR drag pitch editing

Remove Gradio, replace with pure FastAPI + static HTML

Fix key signature application, drag pitch editing, and Apply to OMR rollback

Pass omrData through conversion pipeline to corrector

Add OMR corrector full features + parse/edit API endpoints

Add staff interpolation, manual adjustment, hover tooltip, i18n

Lower minRunLength from 25% to 15% for better staff detection on dense pages

Fix marker positioning, add volume control, key-sig auto-apply, anacrusis playback

Real piano samples via MIDI.js soundfonts CDN

FM synthesis piano sound for note playback

Softer playback sound: sine wave + lower volume + soft attack

Fix page nav visibility + add fullscreen corrector button

Add corrector tool as iframe tab in Gradio UI