Matomo Integration

Added: Added an empty widget placeholder on the "Operations" page to improve layout consistency when no data is available.
Updated: Removed the loader element that was not needed across all Matomo widgets.
Updated: Improved widget layout by adding a widget footer area and correcting the widget body markup.
Updated: Improved the "Matomo Settings" page by adding helpful field descriptions and grouping settings into clearer sections.
Updated: Updated the tip message on the "Matomo Settings" page for better UI consistency.
Updated: Improved the Matomo data page placeholder shown while Matomo data is still loading.
Updated: Renamed the "Refresh Data" button to "Fetch Latest Data" and moved it to the "Data" tab for clearer workflow.
Updated: Improved the success message shown after fetching the latest data for better clarity.