Add the optional "Names and terms" field and send it with every file and live pass

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

DESIGN.md

@@ -28,6 +28,6 @@ exists, not an aspiration. Update in the same commit as visual changes.
 ## Components
 
 One BEM-ish class block per React component in `src/components/` (`.model-picker`, `.dropzone`,
-`.live-controls`, `.engine-toggle`, `.auth-panel`, `.update-toast`, …), with modifier classes like
+`.live-controls`, `.engine-toggle`, `.auth-panel`, `.update-toast`, `.vocabulary-hint`, …), with modifier classes like
 `-selected`, `-active`, `-disabled`. Interactive states use `:hover:enabled` and `:focus-visible`.
 `.visually-hidden` exists for screen-reader-only text.