Add TestFrontend documentation and UndoSystem buffer reference update.

- Document `TestFrontend` for programmatic testing, including examples and usage details.
- Add `UpdateBufferReference` to `UndoSystem` to support updating buffer associations.
This commit is contained in:
2025-11-30 02:56:39 -08:00
parent 91bc986e51
commit 8c8e4e59a4
21 changed files with 5889 additions and 2531 deletions

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