memory: S5c merged on the operator's word; letter-shortcut toggle parked (henge 94)

persistent-memory.md

@@ -35,8 +35,15 @@ _As of 2026-09-27:_
   **S5b MERGED AND PUSHED** (`0233ca6`, operator "merge and push",
   2026-09-28; booth-dev gate 1068 / 428/428 + seam pass clean): focus
   survives a swap, a floating status line, and leaving with an unsent answer
-  ASKS FIRST (beforeunload, both surfaces). S5c (keys, doc bar, and the
-  refused-batch words that a later "Saved." can bury) is design-dev's next.
+  ASKS FIRST (beforeunload, both surfaces). **S5c MERGED AND PUSHED**
+  (`72d6c61`, operator "merge and push", 2026-09-29; booth-dev gate 1108 /
+  480/480 under the hardened tool): `BoothKeys.theirs()` in base.html's head
+  decides whose key it is, the grid cursor is real focus, the doc bar is a
+  `details`, tiles carry `width`/`height` (`items.image_dims`, outside
+  `booth_items`), and a refused batch's words outlive an unrelated save. The
+  anti-slop arc is COMPLETE on design-dev's side. WCAG 2.1.4 (letter
+  shortcuts cannot be turned off): operator said park — henge id 94,
+  `let-the-booth-s-single-letter-keyboard`.
 - ✅ **DOCS CAN NO LONGER RUN SCRIPT** (2026-09-28, Prime ruled "escape"): raw HTML in a `.md` renders as text, doc hrefs go through `is_safe_href`, the board's backslash twin of `//host` is closed. design-dev's anti-slop fix slices (`design-dev/antislop-sN`, Prime said GO in design-dev's session) arrive one ref at a time for booth-dev's gate.
   → `persistent-memory.d/2026-09-28-a-posted-doc-could-run-script.md`
 - ✅ **ONE SUBMIT SAVES EVERY ASK ON A PAGE** (2026-09-27, Prime's bug via