npm plugin sources; quit confirmation before interrupting Droid

v0.150.0

New features

• npm plugin sources - Plugin marketplace definitions can now reference plugins published as npm packages
• Quit confirmation - Desktop now asks for confirmation before quitting or closing would interrupt an active Droid session (app)

Improvements

• Long session performance - Improved chat performance in long sessions (app)
• MCP authentication page - Polished the MCP authentication success page
• Overdue invoice banner - Billing settings now show a banner when an invoice is overdue (app)

Bug fixes

• Rate limit reset display - Fixed the rate limit reset time shown for sub-hour resets