feat(capture): screen recording — menu start, bar-click stop (item 12)

nomarchy-record owns the lifecycle: start prefers wl-screenrec (VAAPI
hardware encode) and falls back to wf-recorder if it dies at startup
(the no-VAAPI case), stop SIGINTs so the file finalizes cleanly, and
status feeds a self-gating Waybar ⏺ REC (alert red) whose click is
the one stop surface — signal 8 pokes make it appear/vanish
instantly. Capture gains Record region/screen (+ audio variants) and
self-swaps to '■ Stop recording' while one runs. Parity: both summer
whole-swap bars carry the same module. Recordings land in
~/Videos/Recordings with the screenshot timestamp naming (deviation
from 'next to Screenshots': an .mp4 in Pictures felt wrong).

V1: rendered bar config + CSS asserted, summer jsonc parse, recorder
dry-run state machine correct (idle/active/usage exits), both
recorders in home-path. Real capture needs a session → V3 queued
(incl. the VAAPI-vs-fallback check on the AMD box).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

agent/HARDWARE-QUEUE.md

@@ -86,6 +86,15 @@ QA machine), the **T14s** (webcam case).
       `sudo nomarchy-snapshots`, restore a single file (`undochange`)
       and walk a root-config rollback up to (or through) the
       typed-`yes` gate.
+- [ ] **Screen recording (item 12)** — Tools › Capture: Record region
+      (slurp) and Record screen produce a playable .mp4 in
+      ~/Videos/Recordings; the red ⏺ REC appears in the bar instantly
+      and CLICKING IT stops + notifies the path; the + audio variants
+      carry sound. While recording, the Capture menu offers only
+      "■ Stop recording". On the AMD box wl-screenrec (VAAPI) should
+      do the work; if it dies at start the wf-recorder fallback kicks
+      in silently — check the notification says which. Summer bars
+      have the same ⏺ (parity).
 - [ ] **Doctor (item 10)** — menu › System › Doctor opens the sheet in
       a terminal; `nomarchy-doctor` over SSH shows the same minus user
       units. On a healthy machine everything is ✔/– (dev-box run