Fusion AI launch film: the HAL 8 card and the widget's lightbox

A 32 s trailer rendered in Blender from the Apex Universe scene. The
pane in it is the real widget replaying answers Fusion AI gave on the
live route, voiced by ElevenLabs Brian, with an original score.
fusion/launch/ holds the 16:9 cut, its poster and English captions.
The HAL 8 section gets a 'Meet Fusion AI' card (Talk to Fusion AI opens
the widget through a fusion:open event), and the widget's welcome
screen a 'Watch the launch film' chip that plays it in a lightbox.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

README.md

@@ -89,6 +89,14 @@ contract is `docs/FUSION.md` in the HAL 8 repository.
 - Chat, code, web search, images, video and voice are always on.
 - Python code blocks run in the visitor's browser.
 
+The launch film lives in `fusion/launch/`. It includes:
+
+- `fusion-ai-launch.mp4`, the 32-second, 16:9 cut shown on the HAL 8 page (the "Meet Fusion AI" card) and in the widget's "Watch the launch film" lightbox;
+- `poster.jpg`, its poster frame;
+- `fusion-ai-launch.vtt`, its subtitles.
+
+The film was rendered in Blender from the Apex Universe scene. The Fusion pane in it is the real widget, playing answers Fusion AI actually gave. The voice is ElevenLabs "Brian", and the score is original.
+
 The widget is `fusion/fusion.js` and `fusion/fusion.css`. After editing
 either, run `python3 tools/fusion_inject.py`: it inlines the CSS and
 re-stamps the module version inside `index.html`, and re-running it