Add AI mockups for the seven remaining catalogue screens

The design catalogue grew to 19 screens, but only the original twelve had an AI
reference; the rest still showed "design -" in `list`. Generated the missing set
so every screen can be reviewed against an intended look:

- wand screening (metal-detected panel with carried items and allow/deny)
- Joke Shop queue, TV Studio arrival, crowd panic, responder arrival
- body-camera timeline, escalation HUD

`generate` now loads `.env` the same way `judge` does, so `--ai` no longer needs
the API key exported by hand. Each reference is 1280x720; the twelve existing
mockups were kept (no `--force`).

Verification: `list` reports 19 designs, Python tooling 53/53, headless suite
182/182, `compare` still 6 good / 0 bad on the captured screens. Version 0.3.2.

TODO.md

@@ -1,6 +1,6 @@
 # TODO
 
-Godot 4.3 prototype. Latest release **v0.3.1** (prop atlas). Headless suite **182/182** plus
+Godot 4.3 prototype. Latest release **v0.3.2** (mockup set). Headless suite **182/182** plus
 **53** Python tooling tests; the session, PLAN-verb, crowd, emergency, timeline, audio, scenario-content, and
 windowed focus/radial smokes pass. Anonymous downloads are enabled on the host.
 
@@ -14,5 +14,3 @@ All planned backlog sections are complete (see `DONE.md`). Optional future ideas
 - [ ] Real voice/dialogue audio (the crowd bed and radio crackle are procedural).
 - [ ] Swap the primitive prop builder for an image-to-mesh model API behind the same
       `assets/models/generated/<prop>.glb` contract.
-- [ ] Regenerate the AI screen mockups for the seven new catalogue entries (only the
-      deterministic wireframes exist so far).