Enhances the update notification experience by improving logic,
readability, and UI styling.
- Reduced "skip this version" reminder period from 7 days to 2 hours for more frequent notifications.
- Integrated showdown.js to render changelog content in Markdown for better formatting.
- Converted changelog text from Markdown to HTML before displaying in the notification bar.
- Enhanced visibility and styling of the update notification bar.
Improves usability of the user list for smaller screens with responsive
detail views and filter controls.
- Added collapsible detail rows to show key user info (Status, Traffic, Expiry, etc.) via toggle button.
- Adjusted table column visibility using Bootstrap (`d-none`, `d-md-table-cell`).
- Updated JS event handlers and column indices for responsive layout support.
- Replaced filter button group with a hamburger dropdown on mobile/tablet.
- Used Bootstrap responsive display classes to toggle between dropdown and full button set.
- Optimized card header space for smaller devices.
Revamps the entire user deletion process to resolve critical performance bottlenecks that caused the web panel and database to freeze when removing multiple users.
- **Backend:** Core scripts (`kickuser.py`, `remove_user.py`) and the database layer are re-engineered to handle multiple users in a single, efficient batch operation using MongoDB's `delete_many`.
- **API:** A new `POST /api/v1/users/bulk-delete` endpoint is introduced for batch removals. The existing single-user `DELETE` endpoint is fixed to align with the new bulk logic.
- **Frontend:** The Users page now intelligently calls the bulk API when multiple users are selected, drastically improving UI responsiveness and reducing server load.
