Added

Introduced tree-style tabs for enhanced organization.
Launched the "Menu Editor" feature:
- Customize "Tab Menu" items with options to enable/disable and reorder via drag-and-drop.
Enabled group creation by dragging and dropping tabs. If a dragged tab hovers over a target position for 1 second and the target tab is not grouped, releasing the mouse will automatically form a new group.
Facilitated multi-selection of tabs for drag-and-drop sorting and group creation.
Added a sync button to the bottom navigation bar for easier access.
Introduced an onboarding guide page for extension installation and an uninstall feedback page (the guide will reappear after updates if the extension is not pinned).

Changed

Implemented confirmation dialogs for deleting snapshots, closing suspended tabs, and suspending all tabs.
Enhanced synchronization logic for improved performance.
Improved preservation of tree information when saving and restoring snapshots.
Adjusted the auto-save interval for recently closed tabs from 10 seconds to 3 seconds.
Modified the auto-save interval for snapshots from 30 seconds to 10 seconds.

Resolved text display issues in the dark theme.
Fixed the issue where TextField lost focus when editing custom group names, and disabled drag-and-drop for text selection to prevent disruptions.
Corrected cache clearing on login/logout to avoid data sync issues between different accounts using the same cache.