Release v0.7.2 — Layout fixes and optional startup checks

Features

• Add a setting to skip the Claude and Codex checks at startup — the status bar then shows the last-known status, and opening the AI assistant or pressing Re-check refreshes it (#142)

Bug fixes

• Remove the stray vertical scrollbars that could appear on an empty document and on the tab bar (#140)
• Keep the document centered in the visible editor area when the AI panel is open, instead of letting it slide underneath the panel (#141)