docs(handoff): record statusline framing revision 3

Advance the active lane and durable handoff to the framing-only Revision
3 checkpoint without changing its awaiting-review status.

docs/active-work.md

@@ -54,8 +54,8 @@ If it does not, stop and repair the remote/fetch configuration.
 ## Active lane: Arc 4 stage 3 — statusline segments
 
 - Portable branch: `githubsucks/statusline-segments`
-- Framing head: `957a2d9`
-- State: framing only, revision 2; re-scouted against `bb17ec9` /
+- Framing head: `5ca76c6`
+- State: framing only, revision 3; re-scouted against `bb17ec9` /
   protocol v17 with no relevant substrate drift.
 - Status: awaiting user review. No implementation and no PR.
 - Scope: composable per-window Lua modeline providers, dynamic

docs/agent-handoff.md

@@ -1,6 +1,6 @@
 # Agent handoff — cross-machine continuity
 
-**Last updated: 2026-07-21, after the statusline stage-3 Revision 2
+**Last updated: 2026-07-21, after the statusline stage-3 Revision 3
 review update, JSON/YAML (#123) merge, and cross-machine continuity
 audit; main also reflects GPU font preferences (#124), themes stage 1
 (#120), and injections (#122).** This file is the
@@ -144,7 +144,7 @@ commands, read `docs/active-work.md` immediately after this file.
   `FontSystem` construction; alternate advances are measured across
   complete shaped runs, not sampled glyphs.
 - **NEXT: themes stage 3 — Lua statusline-segment API.**
-  Revision 2 is preserved on branch `statusline-segments`, re-scouted
+  Revision 3 is preserved on branch `statusline-segments`, re-scouted
   against `bb17ec9` with no relevant substrate drift, and awaits review.
   It scopes additive per-window modeline providers, face-name segments,
   dynamic `ThemeFacts` inventory, and a new v18 `StatuslineSegments`