diff --git a/.planning/STATE.md b/.planning/STATE.md
index 2a5d513..427494a 100644
--- a/.planning/STATE.md
+++ b/.planning/STATE.md
@@ -4,7 +4,7 @@ milestone: v1.0
 milestone_name: milestone
 status: verifying
 stopped_at: Completed 04-04-PLAN.md
-last_updated: "2026-03-29T16:23:36.957Z"
+last_updated: "2026-03-29T16:27:27.702Z"
 last_activity: 2026-03-29
 progress:
   total_phases: 4
@@ -25,8 +25,8 @@ See: .planning/PROJECT.md (updated 2026-03-29)
 
 ## Current Position
 
-Phase: 04 (polish-audio) — EXECUTING
-Plan: 4 of 4
+Phase: 04
+Plan: Not started
 Status: Phase complete — ready for verification
 Last activity: 2026-03-29
 
diff --git a/.planning/phases/04-polish-audio/04-VERIFICATION.md b/.planning/phases/04-polish-audio/04-VERIFICATION.md
new file mode 100644
index 0000000..023475d
--- /dev/null
+++ b/.planning/phases/04-polish-audio/04-VERIFICATION.md
@@ -0,0 +1,182 @@
+---
+phase: 04-polish-audio
+verified: 2026-03-29T18:25:00Z
+status: human_needed
+score: 5/5 must-haves verified
+human_verification:
+  - test: "Play a lesson and verify sounds play on correct keypress, reward screen, and new forest element"
+    expected: "Short beep on correct key, ascending melody on reward, glitter sound on new element"
+    why_human: "Web Audio API sounds cannot be verified without a running browser"
+  - test: "Toggle mute button, reload, verify mute state persists"
+    expected: "Icon changes, no sounds when muted, state survives reload"
+    why_human: "Requires interactive browser session with audio output"
+  - test: "Enable speechEnabled in settings, verify companion text is read aloud in German"
+    expected: "German speech via Web Speech API for companion greeting and reward comment"
+    why_human: "Speech synthesis requires audio output and browser TTS engine"
+  - test: "Export progress, clear browser data, import the file, verify restoration"
+    expected: "JSON file downloads, import restores progress after data loss"
+    why_human: "Requires interactive file dialog and browser data clearing"
+  - test: "Verify no unhandled exceptions during normal lesson flow"
+    expected: "No error overlay appears, console clean during normal usage"
+    why_human: "Requires running app end-to-end in browser"
+  - test: "Verify leaf-fall sway animation and stardust particles visually"
+    expected: "Letters sway side-to-side like leaves, sparkle particles on correct keypress"
+    why_human: "Visual animation quality cannot be verified programmatically"
+  - test: "Resize to <700px and verify responsive layout"
+    expected: "Keyboard shrinks, fonts scale, grid adjusts"
+    why_human: "Visual layout verification requires human judgment"
+---
+
+# Phase 04: Polish & Audio Verification Report
+
+**Phase Goal:** Visuell und auditiv angenehmes Erlebnis, bereit zum Testen mit dem Kind
+**Verified:** 2026-03-29T18:25:00Z
+**Status:** human_needed
+**Re-verification:** No -- initial verification
+
+## Goal Achievement
+
+### Observable Truths (from Success Criteria)
+
+| # | Truth | Status | Evidence |
+|---|-------|--------|----------|
+| 1 | Sounds spielen bei richtigem Tastendruck, Belohnung und neuem Waldelement; Mute-Button funktioniert und Zustand bleibt nach Reload | VERIFIED (code) | playCorrectSound called in screens.ts:217,293; playRewardSound in reward.ts:204; playForestElementSound in scene.ts:48; mute-btn wired in main.ts:24-54 with getSettings/saveSettings persistence |
+| 2 | Buchstaben fallen sanft (keine ruckartigen Animationen), Sternenstaub-Animation erscheint bei Erfolg | VERIFIED (code) | @keyframes leaf-fall in main.css:331 with translateX sway; @keyframes stardust in main.css:388 on .falling-letter--dissolve pseudo-elements |
+| 3 | Sprachausgabe liest Companion-Text vor wenn aktiviert (Web Speech API, Deutsch) | VERIFIED (code) | speakText in speech.ts:31-53 checks speechEnabled, uses de-DE, rate 0.9, pitch 1.1; called from reward.ts:208 and app.ts:219 |
+| 4 | Export und Import funktionieren: Exportieren, Browser-Daten loeschen, Importieren, Fortschritt wiederhergestellt | VERIFIED (code) | exportData in parent.ts:242-262 creates JSON blob download; importData in parent.ts:267-301 validates + confirms + saves; resetAllData in parent.ts:318-324 double-confirms + clears 5 stores |
+| 5 | Keine unbehandelten Exceptions in der Browser-Konsole bei normalem Gebrauch | VERIFIED (code) | Global error + unhandledrejection handlers in main.ts:6-16 show error-overlay; all audio functions use try/catch with silent fallback |
+
+**Score:** 5/5 truths verified at code level
+
+### Required Artifacts
+
+| Artifact | Expected | Status | Details |
+|----------|----------|--------|---------|
+| `src/audio/sounds.ts` | Web Audio API sound effects | VERIFIED | 152 lines; exports playCorrectSound, playRewardSound, playForestElementSound, initAudioOnInteraction; all check audioEnabled via getSettings |
+| `src/audio/speech.ts` | Web Speech API text-to-speech | VERIFIED | 53 lines; exports speakText; checks speechEnabled, uses de-DE, rate 0.9, pitch 1.1, async voice loading |
+| `src/ui/parent.ts` | Export/Import/Reset functions | VERIFIED | 344 lines; exportData, importData (with validation), resetAllData (double confirm, 5 stores); all wired to buttons in loadParentData |
+| `index.html` | Mute button + error overlay + data buttons | VERIFIED | mute-btn at line 194, error-overlay at line 186, export/import/reset buttons at lines 172-177 |
+| `src/styles/main.css` | Animations + responsive + error overlay styles | VERIFIED | leaf-fall, stardust, companion-float keyframes; prefers-reduced-motion at line 1038; responsive @700px at line 1051; error-overlay + mute-btn styles |
+| `src/main.ts` | Global error handler + mute button wiring | VERIFIED | Error handlers at lines 6-16; mute toggle with persistence at lines 24-54; AudioContext init on first interaction at lines 58-64 |
+| `src/ui/screens.ts` | playCorrectSound on correct keypress | VERIFIED | Import at line 22; calls at lines 217, 293 (letter + word mode) |
+| `src/forest/reward.ts` | playRewardSound + speakText | VERIFIED | Imports at lines 23-24; playRewardSound at line 204; speakText at line 208 |
+| `src/forest/scene.ts` | playForestElementSound on new element | VERIFIED | Import at line 4; call at line 48 |
+| `src/app.ts` | speakText for greeting | VERIFIED | Import at line 1; call at line 219 |
+| `src/types.ts` | speechEnabled in Settings | VERIFIED | speechEnabled: boolean at line 56 |
+
+### Key Link Verification
+
+| From | To | Via | Status | Details |
+|------|----|-----|--------|---------|
+| src/audio/sounds.ts | src/storage/db.ts | getSettings check for audioEnabled | WIRED | isAudioEnabled() at line 24-32 calls getSettings, checks audioEnabled |
+| src/audio/speech.ts | src/storage/db.ts | getSettings check for speechEnabled | WIRED | speakText() at line 35-37 calls getSettings, checks speechEnabled |
+| src/ui/screens.ts | src/audio/sounds.ts | import + call on correct keypress | WIRED | import at line 22, calls at lines 217, 293 |
+| src/forest/reward.ts | src/audio/sounds.ts | import + call on reward | WIRED | import at line 23, call at line 204 |
+| src/forest/reward.ts | src/audio/speech.ts | import + speakText for companion | WIRED | import at line 24, call at line 208 |
+| src/forest/scene.ts | src/audio/sounds.ts | import + call on element appear | WIRED | import at line 4, call at line 48 |
+| src/ui/parent.ts | src/storage/db.ts | getProgress/getSettings for export, save for import, clear for reset | WIRED | exportData uses getProgress+getSettings; importData uses saveProgress+saveSettings; resetAllData clears 5 stores |
+| src/main.ts | src/audio/sounds.ts | initAudioOnInteraction on user interaction | WIRED | import at line 3, calls at lines 37, 59 |
+| index.html | src/styles/main.css | error-overlay element + styles | WIRED | error-overlay div in HTML at line 186, styles in CSS at line 999 |
+
+### Data-Flow Trace (Level 4)
+
+| Artifact | Data Variable | Source | Produces Real Data | Status |
+|----------|--------------|--------|--------------------|--------|
+| src/audio/sounds.ts | audioEnabled | getSettings(db) from IndexedDB | Yes -- reads persisted Settings | FLOWING |
+| src/audio/speech.ts | speechEnabled | getSettings(db) from IndexedDB | Yes -- reads persisted Settings | FLOWING |
+| src/ui/parent.ts (export) | progress, settings | getProgress(db), getSettings(db) | Yes -- reads from IndexedDB stores | FLOWING |
+| src/ui/parent.ts (import) | parsed JSON | file.text() + JSON.parse | Yes -- reads user-uploaded file | FLOWING |
+| src/main.ts (mute) | audioEnabled | getSettings(db) + saveSettings | Yes -- reads/writes IndexedDB | FLOWING |
+
+### Behavioral Spot-Checks
+
+| Behavior | Command | Result | Status |
+|----------|---------|--------|--------|
+| TypeScript compiles | `npx tsc --noEmit` | Clean, no errors | PASS |
+| All tests pass | `npx vitest run` | 85 tests passed across 7 files | PASS |
+| Audio modules have correct exports | grep for exports | playCorrectSound, playRewardSound, playForestElementSound, initAudioOnInteraction, speakText all exported | PASS |
+| Mute button in HTML | grep index.html | id="mute-btn" found at line 194 | PASS |
+| Error overlay in HTML | grep index.html | id="error-overlay" found at line 186 with reload button | PASS |
+| Export/Import/Reset buttons | grep index.html | export-btn, import-btn, reset-btn found at lines 172-177 | PASS |
+| Audio wired into all screens | grep for imports | playCorrectSound in screens.ts, playRewardSound in reward.ts, playForestElementSound in scene.ts, speakText in app.ts+reward.ts | PASS |
+
+### Requirements Coverage
+
+| Requirement | Source Plan | Description | Status | Evidence |
+|-------------|-----------|-------------|--------|----------|
+| AUDI-01 | 04-01, 04-04 | Richtiger Tastendruck: Kurzer heller Ton (800Hz, 0.1s) | SATISFIED | playCorrectSound in sounds.ts (800Hz sine, 0.1s); called from screens.ts on correct keypress |
+| AUDI-02 | 04-01, 04-04 | Belohnung: Aufsteigende Tonfolge (0.8s) | SATISFIED | playRewardSound in sounds.ts (C5-E5-G5-C6, 0.8s); called from reward.ts |
+| AUDI-03 | 04-01, 04-04 | Neues Waldelement: Glitzer-Sound | SATISFIED | playForestElementSound in sounds.ts (filtered white noise, 0.5s); called from scene.ts |
+| AUDI-04 | 04-01 | Mute-Button sichtbar, Zustand persistiert | SATISFIED | Mute button in index.html, wired in main.ts with getSettings/saveSettings persistence |
+| AUDI-05 | 04-01, 04-04 | Optionale Sprachausgabe via Web Speech API (Deutsch) | SATISFIED | speakText in speech.ts (de-DE, rate 0.9, pitch 1.1); called from app.ts and reward.ts |
+| PLSH-01 | 04-02 | Fallende Buchstaben als sanft schwebende CSS-Animation | SATISFIED | @keyframes leaf-fall with sinusoidal translateX sway in main.css |
+| PLSH-02 | 04-02 | Erfolg-Animation: Sternenstaub/Glitzer via CSS particles | SATISFIED | @keyframes stardust on .falling-letter--dissolve ::before/::after in main.css |
+| PLSH-03 | 04-02 | Begleitfigur-Avatar: Float-Animation | SATISFIED | @keyframes companion-float on .companion-area__avatar in main.css |
+| PLSH-04 | 04-02 | Responsive bis 700px Breite | SATISFIED | @media (max-width: 700px) in main.css with keyboard/font/grid adjustments |
+| PLSH-05 | 04-02 | Globaler Error-Handler: Kindgerechte Fehlermeldung | SATISFIED | Error + unhandledrejection handlers in main.ts; error-overlay with tree emoji + German message in index.html |
+| PRNT-05 | 04-03 | Export: Fortschritt als JSON (ohne Blobs) | SATISFIED | exportData in parent.ts creates JSON with progress+settings only, downloads as zauberwald-backup.json |
+| PRNT-06 | 04-03 | Import: JSON hochladen mit Validierung | SATISFIED | importData in parent.ts validates structure, confirms overwrite, saves+reloads |
+| PRNT-07 | 04-03 | Reset: Alles loeschen mit doppelter Bestaetigung | SATISFIED | resetAllData in parent.ts with two confirm() dialogs, clears all 5 stores, reloads |
+
+### Anti-Patterns Found
+
+| File | Line | Pattern | Severity | Impact |
+|------|------|---------|----------|--------|
+| src/ui/parent.ts | multiple | noNonNullAssertion (16 instances) | Info | Pre-existing project-wide pattern for DOM element access; not introduced by this phase; not a functional issue |
+
+No TODOs, FIXMEs, placeholders, or stub implementations found in any phase 04 artifacts.
+
+### Human Verification Required
+
+### 1. Audio Playback at Correct Touch Points
+
+**Test:** Start a lesson, type correct letters. Complete a lesson to see reward. Return to forest when new element appears.
+**Expected:** Short beep on each correct key, ascending melody on reward screen, glitter sound when new forest element renders.
+**Why human:** Web Audio API sounds require a browser with audio output.
+
+### 2. Mute Button Persistence
+
+**Test:** Click mute button (bottom-right corner), verify icon changes. Reload page, verify mute state persists.
+**Expected:** Icon toggles between speaker and muted speaker; state survives page reload.
+**Why human:** Requires interactive browser session to verify visual state and persistence.
+
+### 3. Speech Synthesis for Companion Text
+
+**Test:** Enable speechEnabled in settings (currently defaults to false), navigate to forest screen or complete a lesson.
+**Expected:** Companion greeting and reward comment read aloud in German via Web Speech API.
+**Why human:** TTS requires audio output and a browser with speech synthesis support.
+
+### 4. Export/Import Round-Trip
+
+**Test:** Open parent area (code 1234), click "Fortschritt exportieren", clear browser data (Application > Clear Storage), click "Fortschritt importieren" and select the exported file.
+**Expected:** JSON file downloads, after import progress is restored (current level, sessions, character selection).
+**Why human:** Requires interactive file dialogs and manual browser data clearing.
+
+### 5. Leaf-Fall and Stardust Animation Quality
+
+**Test:** Start a lesson, observe falling letters. Type correct letters and observe dissolve animation.
+**Expected:** Letters sway side-to-side like leaves (not just float). Stardust sparkle particles appear on correct keypress dissolve.
+**Why human:** Animation quality and smoothness require visual assessment.
+
+### 6. Responsive Layout at 700px
+
+**Test:** Resize browser window to less than 700px width.
+**Expected:** Keyboard keys shrink, fonts scale down, grid columns adjust.
+**Why human:** Layout responsiveness requires visual verification.
+
+### 7. Error Overlay on Exception
+
+**Test:** Open browser console and run `throw new Error('test')`.
+**Expected:** Child-friendly overlay with tree emoji and "Oh, der Wald braucht kurz eine Pause..." message appears. Reload button works.
+**Why human:** Requires running browser with dev console.
+
+### Gaps Summary
+
+No code-level gaps found. All 13 requirements are satisfied at the implementation level. All artifacts exist, are substantive (no stubs), are properly wired, and data flows through the connections.
+
+The remaining verification is purely behavioral -- confirming that audio plays correctly, animations look smooth, and the export/import round-trip works in a real browser. These items cannot be verified programmatically and require human testing.
+
+---
+
+_Verified: 2026-03-29T18:25:00Z_
+_Verifier: Claude (gsd-verifier)_