Captures the 15 TC rows the lead walks through on the Korean
Win 11 host before tagging v1.0.0-rc.8, plus the auto-test
sign-off matrix (Linux + Windows cargo + flutter analyze +
validator + windows-smoke).
Each TC row maps to a spec requirement (DEC / SRS / SDD) or to a
regression the rc.7 review found. Failures block the tag.
Known gaps recorded at the bottom: macOS / iOS / Android P0 are
separate documents; VAD (DEC-030) and missed-key-up watchdog
redesign (DEC-031) are P1; real RMS level meter is P1.