feat(system-builder): the SETUP page (4a3b)

[over2take]

components/SetupPage.tsx, from the approved mockup builder-setup (2026-10-06): five questions on one page, every change through the builder's edit (autosaved). 1 name (RENAME with its refusal kept in place; the builder's copy updated so the next save keeps it), description, author, license; 2 the health model cards, each model's settings (list editors within the server's limits, new entries given their own ids, numbers clamped), a live starter-sheet preview and what the token shows, and a warning when characters already play it; 3 advancement; 4 dice (toggles, a typed die, eight at most); 5 distance. Switching models and back keeps what was set.

BuilderScreen holds the definition the pages edit (edit = show + autosave.edit) and shows its name in the top bar. Tests now reach what 4a2b couldn't: unsaved status, SAVE, the browser tab asking, EXIT saving first, EXIT.EXE's STAY / TRY AGAIN / EXIT WITHOUT SAVING, PUBLISH stopping on a failed save.

Summary

Test plan

• Tested locally
• Tests pass

Pre-merge checklist

Code quality:

• Code follows project style
• No breaking changes (or clearly documented)
• No console errors or warnings

Version & Release:

• Version bumped? If releasing to users, update:
  • frontend/package.json version
  • docker-compose.yml APP_VERSION
  • CHANGELOG.md with release notes
• GitHub Actions will auto-tag Docker images with the new version

Before merging to main:

• All tests passing
• PR reviewed and approved
• Branch is up to date with main
• No merge conflicts

Related issues