Ensure SQLite migration logs to stderr instead of stdout

Improvements

• DesktopFixed issue viewing new files opened from the file tree@shanebishop1
• DesktopOnly navigate prompt history at input boundaries@nexxeln
• DesktopAdd keyboard shortcut Shift+Tab to the application@neriousy
• DesktopFocus window after update and relaunch@zerone0x
• DesktopAdd GeistMono Nerd Font to available mono font options@brandon-julio-t
• CoreEnsure Anthropic models on OpenRouter also have variant support
• CoreAdd WAL checkpoint on database open
• CoreEnsure Vercel variants pass Amazon models under Bedrock key