feat: a custom system's words in the building GM notes and the admin …

[over2take]

…GAME tab

The building window's GM NOTES folder and header, the admin editor's label and its save messages, BANK SOUNDS and the INITIATIVE FOLLOWS BUILDING house rule (label and tooltip) ask for their words with the text they show today. The notes box's screen-reader label, shared with the token window, now names the GM in the system's word too; 3a3 had missed it.

Built-in systems and a custom system that renamed nothing read exactly as before. The XP window, the vehicles window and the shop buy-back rate keep today's text: no custom system can reach them until its XP, vehicles and shops arrive (3b).

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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