docs(04): capture phase context (assumptions mode)

2026-03-29 18:06:03 +02:00
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+# Phase 4: Polish + Audio - Discussion Log (Assumptions Mode)
+
+> **Audit trail only.** Do not use as input to planning, research, or execution agents.
+
+**Date:** 2026-03-29
+**Phase:** 04-Polish + Audio
+**Mode:** assumptions
+**Areas analyzed:** Audio Architecture, Speech Synthesis, Animations, Responsive, Error Handling, Export/Import/Reset
+
+## Assumptions Presented
+
+### Audio Architecture
+| Assumption | Confidence | Evidence |
+|------------|-----------|----------|
+| Web Audio API procedural sounds, shared AudioContext | Confident | SPEC line 1012, Settings.audioEnabled exists |
+| Mute button fixed outside screen sections | Likely | showScreen() hides all sections |
+
+### Animations
+| Assumption | Confidence | Evidence |
+|------------|-----------|----------|
+| Leaf-fall CSS animation replacing letter-float | Likely | Current animation is simple translateY |
+| Stardust via CSS pseudo-elements | Likely | Pure CSS, no JS needed |
+
+### Export/Import
+| Assumption | Confidence | Evidence |
+|------------|-----------|----------|
+| JSON export of progress + settings, no blobs | Likely | SPEC: "ohne Bild-Blobs" |
+
+### Responsive + Error
+| Assumption | Confidence | Evidence |
+|------------|-----------|----------|
+| @media max-width 700px, global error handler | Confident | Zero media queries currently |
+
+## Corrections Made
+
+No corrections — all assumptions confirmed.
+
+## External Research Flagged
+
+- Web Speech API German voice availability on Linux
+- AudioContext auto-play policy compliance