- Remove stale tab bar references (ADR-0003: single note model)
- Remove stale theme commands and modules (ADR-0013: theming removed)
- Fix SearchPanel label from "keyword/semantic/hybrid" to "keyword search"
- Update VaultEntry: owner/cadence moved to properties map
- Update frontmatter example to use type: instead of is_a:
- Fix commands.rs → commands/ (module was split)
- Update four-panel layout diagram and Editor description
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>
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