Vernac 1.0.1

Improves popup/sidebar behavior, scan-page reliability, and DeepL handling.

Changes:
- Popup mode is now respected when translating selected text from the floating button or right-click context menu.
- In-place translations can persist after closing the popup or sidebar.
- Added a visible “Revert page translation” control when preserved in-place translations are active.
- Improved scan-page cleanup and same-language handling.
- DeepL keys are stored in browser session storage by default, with optional local remember.
- Fixed DeepL Chinese (Traditional) target-language handling.
- General code quality, linting, and message-consistency checks were improved.

Thank you for using Vernac!