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.

DONE.md

@@ -678,3 +678,16 @@ regenerated and `screen_designs.py compare` still reports 6 good / 0 bad.
 - [x] Tests: atlas determinism and power-of-two sizing, UV range, palette override reaching the
       atlas, and a Godot test that each imported prop scene uses exactly one material.
 - [x] Removed the now-unused sRGB→linear factor helpers (colours travel in the sRGB texture).
+
+## Complete AI Mockup Set
+
+Completed 2026-10-31 (v0.3.2). All 19 catalogue screens now have an AI reference; Python
+tooling **53/53**.
+
+- [x] Generated mockups for the seven entries that only had wireframes: wand screening,
+      Joke Shop queue, TV Studio arrival, crowd panic, responder arrival, body-camera
+      timeline, escalation HUD.
+- [x] `generate` loads `.env` like `judge` already did, so `--ai` works without exporting
+      `OPENROUTER_API_KEY` by hand.
+- [x] Verified every reference is 1280x720, reviewed the new images visually, and confirmed
+      `list` reports 19 designs (12 kept, 7 new).