v4.9.120 — Capture health honesty

Remote Desktop — Capture health honesty / no Live flicker (contract 1.4.87)

• Clear stale helper_fail=no_frame when healthy printwindow-logonui / DXGI frames are on the wire
• Healthy method tags win over leftover black/flat streaks
• JPEG-WS primary + healthy pixels: do not advertise WEBRTC_PEER_ERROR as Capture FAIL root
• Emit t:capture_diag phase=live on recovery so dashboard replaces FAIL · no_frame banner

Lab: Ninety-Web LogonUI — Live badge must stay Canlı without Canlı↔Bekleniyor flicker.

SHA256: f8e65f2ba6f347ee6664d18805cec7e2f770a1ac2c0f0d91f023485ad5ef87c6