White the Joke Shop canopy signature band to match the reference

TODO.md

@@ -194,6 +194,11 @@ licence-free zone only.
       field, six columns, eight steps, landing + guard spawn at y=1.0) while keeping the arrival
       staging (`bulb_canopy`, `sedan`, `handrail`, barriers); Godot 276/276, screenshot smoke
       21/0, `13-studio-arrival.png` recaptured.
+      **Fix 3 landed:** the Joke Shop canopy signature band is now white (`Color(0.90, 0.88, 0.80)`)
+      over the black fascia, matching the concept's "white celebrity signatures"; a test asserts
+      the `CanopySignatures` label is white, Godot 276/276, `12-joke-shop.png` + the three-up
+      board recaptured. Note: fix 2 (blade sign) is already a circular disc on a roof pole in the
+      code (`37f925c`); the ranking note was stale.
 - [ ] Lighting: `lighting`/`lookdev` pass on sconces, canopy, marquee and street lamps with
       day/late captures; verify local attenuation stays at 1.0 and no constant-falloff light returns.
 - [ ] Set dressing: review entrance and sidewalk prop clusters (`set-dressing`) for occlusion,