Attempt 1
not recorded
metrics unavailable
仅验证 Local First / PWA / Recording / Persistence / Metrics / Recovery。无自动 STT、无 LLM API、无普通话评分。
Capability
checking…
Service Worker: checking…
Interrupted / incomplete recording detected
上一段录音可能不完整，不会作为正常 A/B 结果。请重新录制。
1. Session
No session
2. Recording Spike
Attempt 2
not recorded
metrics unavailable
S03 Same-Blob Diagnostic v16 — historical Attempt, READ ONLY
从本 origin 的 IndexedDB 按固定 Attempt ID 读取。首次 SHA-256 仅是现在的基线，不能证明录音创建时的字节完整性。
Reading fixed Attempt…
Phase 4B D1-R2 v18 — Current Attempt READ ONLY
选择当前 Session 的录音。点击后才从 IndexedDB 读取 Blob、计算 SHA-256、尝试 Web Audio 解码，并创建独立播放器。无麦克风、无自动播放、无业务数据写入；第一次 SHA 不是录音初始基线。
D1 read-only check not run
Phase 4B S03 — Reload Diagnostic v14 (current page)
Initializing reload diagnostic…
Phase 4B S03 — Latest Attempt Pipeline Trace (independent of current Session)
No trace recorded on this origin
R7 Web Audio substage — v12
No R7 trace yet
R0–R17 stage timeline
No stages
Phase 4B Recorder Control Diagnostic
control diagnostic unavailable
S03 Phase 4B Media Diagnostic
临时真机诊断：A = 原始录音 Blob；B = IndexedDB 立即读回；C = Reload 后读回。仅用于 Phase 4B，不属于 V1 产品功能。
Attempt 1
no media diagnostic yet
Attempt 2
no media diagnostic yet
3. Feedback Pack + One Active Target
no active target
4. A/B + Recovery
comparison unavailable