docs: refresh architecture and development docs

Update docs content to match current launcher/plugin/runtime structure and fix stale home demo media assets with cache-busted URLs plus poster refresh. Add supporting backlog/subagent tracking records and docs asset regression coverage.
This commit is contained in:
2026-02-22 20:25:55 -08:00
parent 36e9346595
commit 1d3f099e44
14 changed files with 428 additions and 59 deletions

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