Commit 7205d7a3 replaced runtime directory probing with buildKnownSessionDirectories
filtering, but left the hook, prop, state, and UI checks as a transitional artifact.
- Delete useDirectoryStatusProbe.ts
- Remove directoryStatus state/prop from SessionSidebar, SessionGroupSection, SessionNodeItem
- Remove isMissingDirectory checks, opacity-75 styling, and disabled states
- Simplify handleSessionSelect signature
- Update sidebar DOCUMENTATION.md
Co-authored-by: Leonid Skorobogatyy <bash@opencode.itc.local>
