All findings genuinely closed: the own-slider push verified against the
never-clamp invariant (mid-drag no-op by construction); the DragCompleted
single-fire proven at all three MouseUp sites with a STRONGER capture
argument than the fixer's (pointer capture + Reset needing its own
click); the S3 review-correction verified from git (the round-trip test
existed at e71e5a96 — the review was wrong, the commit right).
Coordinator residuals (third-round, mine): R1 — _draggingThumb clears
only at MouseUp, but UiRoot can drop capture without one (panel-close
keybind mid-drag; second-button re-target), latching IsDragging true
forever so Reset/Defaults apply live but never persist; the
UiRoot.PointerCaptureChanged seam exists for the root fix. R2 — a bare
track click sets _draggingThumb unconditionally in OnScalarEvent, so it
double-flushes and refutes the DragCompleted doc's never-fires-on-jump
claim. Five NOTEs recorded incl. the Chat-side de-scoping blind spot.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
