Refreshed the popup, compose assistant, settings, translation result, and daily rundown interfaces with a native visual style.

In this release, the changes are mainly about:

1. Harden AI provider requests, config loading, timeouts, and error handling
2. Add shared message text helpers for truncation, MIME extraction, and safe HTML/text conversion
3. Improve compose actions with write, reply, polish, shorten, copy, and safer insert
4. Preserve quoted reply content during draft insertion with confidence checks
5. Make translation handoff tokenized and clean up temporary stored content
6. Refresh popup button styling

fix: harden AI service and resolve multiple bugs

1. Add Daily Rundown feature with AI-powered email summarization;
2. Add InboxAI SVG icon.

- Added a clear opt-in option on the settings page before any data is sent to an external AI service. Also explained exactly what data is shared
- Removed unused permissions to minimize the permission scope.
- Improved user experience by automatically opening the options page when required settings have not been configured.