Switchboard 0.6.2

Fixed

• Keep long Codex replies pinned to the final metadata row after markdown layout settles, while still respecting manual scroll-away during active replies.
• Clear stale screen-reader reply status when starting an empty session.
• Make narrow-window new sessions use the standard chat width, with the sidebar moving off-canvas earlier so the composer and starter prompts do not collapse into a thin column.

Verification

• make check
• git diff --check
• build + twine check for switchboard-local 0.6.2
• browser UX pass across 665x935, 390x844, and 1165x768