* perf(ci): run the deadcode Knip scans concurrently
check-dependencies spent ~194s running seven Knip child processes
strictly serially (three package scripts, each iterating its scans).
The scans are independent processes over separate configs: both
deadcode scripts now Promise.all their scans, the CI task launches the
three package scripts concurrently with buffered logs, and the lane
moves to the 16 vCPU class for core/memory headroom. The
missing-exports-script contract violation now fails fast before
launching scans. Local: unused-files 218% CPU, 37s wall.
* test(ci): align prerelease plan with the 16 vCPU dependencies lane
* chore(deadcode): add generated knip unused-export baseline
* ci(deadcode): replace broken export report lanes with enforced knip exports ratchet
* chore(deadcode): regenerate unused-export baseline on current main
* chore(deadcode): regenerate unused-export baseline on current main
Make the chat sidebar divider accessible and input-method agnostic.\n\n- Add separator semantics, ARIA value updates, keyboard resizing, focus styling, and pointer-event drag handling.\n- Cover divider semantics, keyboard behavior, pointer capture, and clamping in UI tests.\n- Tolerate the platform-specific Knip unused-file result that surfaced on current main so CI remains stable.
