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/BACKLOG.md

@@ -26,15 +26,6 @@ next, in what order*.
 
 ## NEXT
 
-### 12. Screen recording in the Capture submenu
-New; screenshots ship, recording doesn't — a standard workstation need.
-Extend `nomarchy-menu capture`: record region/full → `wl-screenrec`
-(fallback `wf-recorder`), saved next to Screenshots, with a self-gating
-Waybar recording indicator that stops the recording on click (the only
-sane "stop" surface). Optional audio toggle. Parity rule applies.
-**Verify:** V1 + `bash -n`; V2 headless if the software-GL recipe
-supports it, else V3 queue.
-
 ### 13. Small niceties batch (one slice per iteration)
 Each is a small, self-contained polish item in the existing patterns:
 - **Idle-inhibit (caffeine) toggle:** Waybar `idle_inhibitor` module
@@ -106,7 +97,8 @@ earns ≥3 entries — keep the root at six.
 - **Per-theme icon overrides** / more icon packs (ROADMAP § Icon themes).
 - **MIPI/IPU software-ISP camera** support (no-UVC machines).
 - **OCR screenshot-to-text**: a Capture › entry (grim region → tesseract
-  → clipboard) — cheap once recording (#12) reshapes the submenu.
+  → clipboard) — recording (#12, shipped 2026-07-04) already reshaped
+  the submenu, so this is now a two-row addition.
 - **Doctor Waybar warning**: a self-gating bar indicator fed by
   `nomarchy-doctor` (shipped 2026-07-04) — appears only when the sheet
   has a ✖; click opens the sheet.