bug fixes

Improved recently closed tab restoration using the browser Sessions API.
Restores tabs with browser history and state when supported.
Added fallback URL reopening for unsupported browsers.
Added Sessions permission.
Updated version metadata to 1.0.10.

Redesigned the Options page with tabbed settings and improved controls.
Added modifier-key shortcuts for tab actions, shortcut clearing, duplicate prevention, and visual key icons.
Improved popup behavior, keyboard navigation, autofocus, Escape-to-close, and window cycling.
Added browser-specific exclude defaults and improved disabled-control styling.
Improved mute-state handling and Firefox active-tab/command support.
Moved favicon caching to IndexedDB for better performance.
Removed persistent Closed Tabs History and related settings.
Updated extension icons, Firefox add-on ID, WXT, and packaging scripts.
Added browser-specific build and ZIP commands.