Add the licensed Joke Shop reference board

TODO.md

@@ -152,8 +152,12 @@ and never ship a generated or downloaded image without provenance.
       Ovation across street, premiere staging) with a sidecar and per-image purpose, linked from
       `docs/hollywood-boulevard-map.md` and credited in `CREDITS.md`. Cropped the foreground crowd
       out of the facade shot; EXIF stripped. (`docs/screens/refs/hollywood/`.)
-- [ ] Joke Shop board: licence-cleared Sunset Strip photos (canopy, blade sign, hillside,
-      across-street frontage) with the same sidecar, and link it from `docs/joke-shop-map.md`.
+- [x] Joke Shop board: three licence-cleared photos (hillside/canopy block, frontage with palms,
+      canopy signature band) with a sidecar, linked from `docs/joke-shop-map.md` and credited in
+      `CREDITS.md`. The CC BY-SA `The Comedy Store.jpg` from the old link list was deliberately not
+      used; the public-domain frames cover the same evidence. (`docs/screens/refs/joke-shop/`.)
+- [ ] Fill the Joke Shop gaps: night canopy/sign, entrance recess, south-side neighbours, hillside
+      house detail.
 - [ ] TV Studio board: licence-cleared studio-entrance photos (or a documented decision to use
       generated concepts only, with the reason) and its sidecar.
 - [ ] Fill the remaining Hollywood gaps noted in the board README: night facade, Walk of Fame