docs(phase-09): complete phase execution
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gsd_state_version: 1.0
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milestone: v1.1
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milestone_name: Features & Extensibility
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status: in_progress
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last_updated: "2026-03-07"
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status: unknown
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last_updated: "2026-03-07T15:12:59.202Z"
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progress:
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total_phases: 6
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total_phases: 1
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completed_phases: 1
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total_plans: 5
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completed_plans: 5
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---
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phase: 09-scan-cancellation-keyboard-shortcuts
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verified: 2026-03-07T15:30:00Z
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status: passed
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score: 7/7 must-haves verified
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re_verification: false
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human_verification:
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- test: "Start a library scan with a large folder, click Pause, verify progress freezes, click Resume, verify scan continues"
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expected: "Scan pauses immediately at next worker checkpoint, status bar shows 'Scan paused.', Resume continues from where it left off"
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why_human: "Requires running the app with a real audio library directory to observe real-time scan behavior"
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- test: "Start a scan, click Cancel, verify confirmation dialog shows track count and Keep/Discard/Continue options"
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expected: "Dialog shows 'Keep X tracks found so far, or discard?', clicking Keep stops the scan but preserves partial results, clicking Discard cancels and shows informational message"
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why_human: "Dialog rendering, track count accuracy, and database state after cancel require runtime verification"
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- test: "Press Space/N/P/Up/Down/Left/Right/S/R/Q/M keys without any text input focused"
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expected: "Each key triggers its mapped action (play/pause, next, previous, volume up/down, seek fwd/back, shuffle, repeat, queue toggle, mute)"
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why_human: "Keyboard event dispatch to actual player/queue requires live playback context"
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- test: "Click into search box, type text, verify shortcuts don't fire. Press Escape, verify focus returns to body and shortcuts work again"
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expected: "Text appears in search box without triggering player actions. Escape blurs the input."
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why_human: "Shadow DOM focus behavior and text input suppression require browser runtime"
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- test: "Open Settings > Keyboard Shortcuts, click a shortcut badge, press a new key, verify binding updates. Try a conflicting key, verify warning appears"
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expected: "Badge shows 'Press a key combo…', captures new key, saves it. Conflict banner shows with Overwrite/Cancel options."
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why_human: "Visual capture UI behavior and conflict resolution flow require interactive testing"
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- test: "Rebind a shortcut, restart the app, verify the custom binding persists"
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expected: "After restart, the shortcut settings show the custom binding, and pressing the custom key triggers the correct action"
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why_human: "TOML persistence across app restart requires full app lifecycle"
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---
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# Phase 9: Scan Cancellation & Keyboard Shortcuts Verification Report
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**Phase Goal:** Users can control library scans (cancel/pause/resume) and operate the entire app via keyboard
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**Verified:** 2026-03-07T15:30:00Z
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**Status:** passed
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**Re-verification:** No — initial verification
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## Goal Achievement
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### Observable Truths
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| # | Truth | Status | Evidence |
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|---|-------|--------|----------|
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| 1 | CancelScan/PauseScan/ResumeScan methods stop/pause/resume scan workers | ✓ VERIFIED | `scan_control.go`: CancelScan calls `cancel()` on scanCtx, PauseScan creates blocking channel, ResumeScan closes it. `library.go:508`: workers call `waitIfPaused(scanCtx)` before processing. Three `scanCtx.Done()` select cases (lines 329, 356, 532). |
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| 2 | Cancelled scans don't corrupt DB — orphan cleanup skipped, batch commits use l.ctx | ✓ VERIFIED | `library.go:587-594`: `cancelled := scanCtx.Err() != nil`, orphan cleanup wrapped in `if !cancelled` block. `library.go:650`: variant generation also skipped on cancel. DB ops use `l.ctx` (app context), not `scanCtx`. |
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| 3 | Default keyboard shortcuts work immediately (Space, arrows, S, R, Q, M, N, P) | ✓ VERIFIED | `keyboard-shortcut-service.ts`: singleton registers `document.keydown` listener. `dispatch()` maps all 16 actions to store/Wails calls. `shortcuts/config.go:13-38`: DefaultBindings returns all 16 bindings. Service imported at `frontend/index.ts:28`. |
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| 4 | Shortcuts suppressed in text inputs (except Escape to blur) | ✓ VERIFIED | `keyboard-shortcut-service.ts:313-321`: `if (scope === 'text-input')` returns early for all keys except Escape which calls `blur()`. `isTextInputFocused` checks INPUT (text types), TEXTAREA, contentEditable. |
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| 5 | User can rebind shortcuts via record-style capture in settings | ✓ VERIFIED | `shortcut-capture.ts`: full record-style component — click enters recording, `handleKeydown` captures via `buildKeyString`, dispatches `shortcut-change` event. `config-page.ts:1717-1810`: `renderShortcutsSection()` renders all 16 shortcuts grouped by category with capture widgets. |
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| 6 | Shortcut conflicts detected and warned about | ✓ VERIFIED | `config-page.ts:1245-1270`: `handleShortcutChange` calls `shortcutsStore.findConflict()`. Conflict shows inline banner with Overwrite/Cancel. `handleConflictOverwrite` unbinds old action then sets new one. |
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| 7 | Shortcut bindings persist to TOML via Wails bindings | ✓ VERIFIED | `config/config.go:600-696`: `GetShortcuts`, `SetShortcut`, `SetShortcuts`, `ResetShortcuts` methods exist with Save() calls and event emission. `shortcuts/config.go` with `Bindings map[string]string \`toml:"Bindings"\``. Config struct has `Shortcuts *shortcuts.Config \`toml:"Shortcuts"\`` at line 34. |
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**Score:** 7/7 truths verified
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### Required Artifacts
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| Artifact | Expected | Status | Details |
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|----------|----------|--------|---------|
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| `backend/library/scan_control.go` | CancelScan, PauseScan, ResumeScan, IsScanActive, IsScanPaused methods | ✓ VERIFIED | 89 lines. All 5 exported methods + unexported `waitIfPaused`. Proper mutex locking, channel coordination. |
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| `backend/events/events.go` | LibraryScanCancelled/Paused/Resumed events | ✓ VERIFIED | Lines 51-56: all 3 new scan control event constants. ShortcutsConfigChanged at line 31. |
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| `frontend/src/events.ts` | Generated TypeScript event constants in sync | ✓ VERIFIED | Lines 38-40: LibraryScanCancelled/Paused/Resumed. Line 22: ShortcutsConfigChanged. |
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| `backend/library/metrics.go` | Cancelled bool field on ScanMetrics | ✓ VERIFIED | Line 54: `Cancelled bool \`json:"cancelled"\`` |
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| `backend/shortcuts/config.go` | Config, ApplyDefaults, Validate, DefaultBindings | ✓ VERIFIED | 65 lines. Config struct, 16 default bindings, ApplyDefaults preserves user customizations, Validate is well-formed. |
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| `backend/config/config.go` | Shortcuts field, GetShortcuts/SetShortcuts/SetShortcut/ResetShortcuts | ✓ VERIFIED | Shortcuts field at line 34. Four Wails-bound methods (lines 601-696). applyDefaults at lines 202-206. Validate at lines 91-95. |
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| `frontend/src/services/keyboard-shortcut-service.ts` | Singleton service with scope resolution | ✓ VERIFIED | 356 lines. buildKeyString, getDeepActiveElement, isTextInputFocused, resolveScope, dispatch (16 actions), KeyboardShortcutService class with document keydown listener. Exported singleton at line 351. |
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| `frontend/src/store/shortcuts-store.ts` | Store with Wails persistence and event sync | ✓ VERIFIED | 190 lines. ShortcutsStore class with getBindings, getKeyForAction, getActionForKey (scope-aware), findConflict, updateBinding, resetAll, setAll. Loads from GetShortcuts, listens to ShortcutsConfigChanged. queueMicrotask coalescing. |
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| `frontend/src/store/controllers/shortcuts-controller.ts` | ReactiveController for Lit components | ✓ VERIFIED | 61 lines. Implements ReactiveController with hostConnected/Disconnected, state getter, bindings getter, updateBinding, resetAll. |
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| `frontend/src/components/config-page/shortcut-capture.ts` | Record-style key capture component | ✓ VERIFIED | 165 lines. LitElement with recording state, click/keydown/blur handlers, buildKeyString integration, Escape cancel, per-shortcut reset button, CSS with pulse animation. |
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| `frontend/src/components/config-page/config-page.ts` | Scan control UI + Shortcuts settings section | ✓ VERIFIED | Scan buttons (Pause/Resume/Cancel) at lines 1905-1941. Cancel dialog at lines 1978+. Shortcuts section via renderShortcutsSection() at line 1717. SHORTCUT_META with all 16 actions at line 221. Conflict detection at line 1245. |
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| `frontend/src/store/index.ts` | Shortcuts store and controller exports | ✓ VERIFIED | Lines 12-14: shortcutsStore, ShortcutsState, ShortcutsController exported. |
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### Key Link Verification
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| From | To | Via | Status | Details |
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|------|----|-----|--------|---------|
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| `scan_control.go` | `library.go` | `l.scanCancel`, `l.scanPauseCh` fields on Library struct | ✓ WIRED | Library struct has scan control fields (lines 88-92). scan_control.go reads/writes them with mutex. Scan() initializes them (lines 185-209). |
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| `library.go` | `events.go` | EventsEmit for scan lifecycle events | ✓ WIRED | `LibraryScanCancelled` emitted at line 684, `LibraryScanPaused/Resumed` emitted in scan_control.go:36,51. |
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| `keyboard-shortcut-service.ts` | `shortcuts-store.ts` | Service reads bindings from store | ✓ WIRED | Line 13: imports shortcutsStore. Line 329: `shortcutsStore.getActionForKey(keyStr, scope)`. |
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| `shortcuts-store.ts` | `config/config.go` | Wails bindings GetShortcuts/SetShortcut/ResetShortcuts | ✓ WIRED | Lines 3-7: imports GetShortcuts, SetShortcut, SetShortcuts, ResetShortcuts. Used in loadFromBackend (line 57), updateBinding (line 152), setAll (line 159), resetAll (line 164). |
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| `keyboard-shortcut-service.ts` | `player-store.ts` / `queue-store.ts` | Action dispatch calls store methods | ✓ WIRED | Lines 14-15: imports playerStore, queueStore. Line 16: imports Player Wails bindings. dispatch() calls togglePlayback, next, previous, ChangeVolume, Seek, toggleShuffle, cycleRepeat, MuteToggle. |
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| `config-page.ts` | `scan_control.go` | Wails bindings CancelScan/PauseScan/ResumeScan | ✓ WIRED | Lines 8-10: imports CancelScan, PauseScan, ResumeScan. Used in handlePauseScan (line 996), handleResumeScan (line 1000), handleCancelKeep (line 1013), handleCancelDiscard (line 1019). |
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| `config-page.ts` | `events.go` | EventsOn for scan lifecycle events | ✓ WIRED | Lines 892-903: EventsOn for LibraryScanPaused/Resumed/Cancelled registered in connectedCallback. |
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| `shortcut-capture.ts` | `keyboard-shortcut-service.ts` | Uses buildKeyString for key normalization | ✓ WIRED | Line 3: `import { buildKeyString } from '../../services/keyboard-shortcut-service'`. Used in handleKeydown (line 85). |
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| `config-page.ts` | `shortcuts-store.ts` | ShortcutsController + store methods | ✓ WIRED | Line 36-37: imports shortcutsStore and ShortcutsController. Line 218: creates controller instance. Lines 1252, 1269, 1277, 1282, 1294: calls findConflict, updateBinding, resetAll. |
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| Service → App startup | `frontend/index.ts` | Import triggers instantiation | ✓ WIRED | `frontend/index.ts:28`: `import './src/services/keyboard-shortcut-service'` — side-effect import initializes singleton. |
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### Requirements Coverage
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| Requirement | Source Plan | Description | Status | Evidence |
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|-------------|-----------|-------------|--------|----------|
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| SCAN-01 | 09-01, 09-03 | User can cancel an in-progress library scan via a cancel button | ✓ SATISFIED | Backend: CancelScan() cancels scanCtx. Frontend: Cancel Scan button calls CancelScan() Wails binding after confirmation dialog. |
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| SCAN-02 | 09-01, 09-03 | Cancelled scan stops gracefully without corrupting the database | ✓ SATISFIED | Orphan cleanup skipped on cancel (`library.go:591-594`). Variant generation skipped (`library.go:650`). Batch commits use `l.ctx` not `scanCtx` — in-flight transactions complete. `ScanMetrics.Cancelled` set to true. |
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| SCAN-03 | 09-01, 09-03 | User can pause a library scan and resume it without re-scanning processed files | ✓ SATISFIED | PauseScan creates blocking channel, workers block at `waitIfPaused`. ResumeScan closes channel, workers continue. Frontend Pause/Resume buttons toggle correctly. Already-processed files remain processed. |
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| KEY-01 | 09-02 | Default keybindings work out of box | ✓ SATISFIED | 16 default bindings in `shortcuts/config.go`. Service dispatches all actions: Space, N, P, Up, Down, Left, Right, S, R, M, Q, /, Ctrl+F, Ctrl+A, Enter, Delete. Singleton auto-initialized at app startup. |
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| KEY-02 | 09-04 | User can customize all keyboard shortcuts via a visual settings UI | ✓ SATISFIED | Config page has "Keyboard Shortcuts" section with shortcut-capture widgets for all 16 actions. Record-style capture, per-shortcut reset. |
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| KEY-03 | 09-04 | Shortcut conflicts are detected and warned about when rebinding | ✓ SATISFIED | `handleShortcutChange` calls `findConflict`. Conflict banner shows with Overwrite/Cancel. Overwrite unbinds old action. |
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| KEY-04 | 09-02 | Shortcuts are scoped — different bindings apply based on focused component | ✓ SATISFIED | `resolveScope()` returns text-input/panel:X/global. `getActionForKey` checks panel-specific bindings first, then global. `data-shortcut-scope` attribute pattern established. Tracklist actions scoped to `panel:track-list`. |
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| KEY-05 | 09-02 | Shortcuts are disabled when text input has focus (except Escape to blur) | ✓ SATISFIED | `handleKeydown`: if scope is text-input, only Escape passes through (blurs active element). All other keys suppressed. `isTextInputFocused` checks INPUT, TEXTAREA, contentEditable. |
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### Anti-Patterns Found
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| File | Line | Pattern | Severity | Impact |
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|------|------|---------|----------|--------|
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| — | — | No anti-patterns found | — | — |
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No TODOs, FIXMEs, placeholders, stubs, or empty implementations found in any phase 9 files.
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### Build Verification
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| Check | Status | Details |
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|-------|--------|---------|
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| `go build ./...` | ✓ PASS | Backend compiles with zero errors |
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| `go vet ./...` | ✓ PASS | No vet warnings |
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| `npx tsc --noEmit` | ✓ PASS | Frontend TypeScript compiles with zero errors |
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| Events sync | ✓ PASS | `events.ts` matches `events.go` (generated) |
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### Bug Fix Verified
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The volume data flow bug found during Plan 05 human verification has been fixed:
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- `backend/player/player.go:680-689`: `ChangeVolume()` calls `emitVolumeChanged()` and `saveState()`
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- `backend/player/player.go:696-705`: `MuteToggle()` calls `emitVolumeChanged()` and `saveState()`
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### Human Verification Required
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6 items require human testing to fully confirm runtime behavior. All automated/structural checks pass. See frontmatter for detailed test procedures.
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1. **Scan pause/resume flow** — Real-time pause behavior with actual audio files
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2. **Cancel confirmation dialog** — Dialog rendering, track count accuracy, database state
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3. **Default keyboard shortcuts** — Key dispatch to actual player/queue in live context
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4. **Text input suppression** — Shadow DOM focus behavior in browser runtime
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5. **Shortcut rebinding UI** — Visual capture and conflict resolution flow
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6. **Shortcut persistence** — TOML persistence across full app restart
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### Gaps Summary
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No gaps found. All 7 observable truths verified. All 12 artifacts exist, are substantive (not stubs), and are properly wired. All 10 key links verified with grep evidence. All 8 requirements (SCAN-01/02/03, KEY-01/02/03/04/05) satisfied. Backend and frontend build cleanly. No anti-patterns detected.
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---
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_Verified: 2026-03-07T15:30:00Z_
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_Verifier: Claude (gsd-verifier)_
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