refactor: STATS & RULES' controls shared (5a3b1)

[over2take]

The controls that edit a stats group, a table and a formula (its name, its text with its mistake and its alternative, INSERT's chips) move out of StatsRulesPage into statsRulesFields, one copy that FORMS lays out and the graph view's node panel will show, so an edit made from the map is the same edit as one made in FORMS. No change to what FORMS does; its tests pass unchanged.

The builder test that opens GRAPH gives the lazily loaded map up to five seconds, as a busy run is slow to fetch it.

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

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