Brings AIUI's full 230-commit history under aiui/ via git subtree, plus main's
current head. Operator decision 2026-08-03: AIUI moves into this repo rather
than staying at git.tx1138.com. This also lands e30ac1d (13-01 Task 3), which
was stranded local-only while that remote was unreachable.
Plans 13-06, 13-09 and 13-11 still target /home/archipelago/Projects/AIUI paths
and must be re-planned against aiui/ before wave 2 runs.
Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>