Description

When Frame is enabled, edge widgets on both ends of the bar had no inset from the frame corners — _frameLeftInset/_frameRightInset (horizontal bar) and _frameTopInset/_frameBottomInset (vertical bar) fell back to 0 when no adjacent bar was present, causing widgets to sit flush against the frame.
Fixed by introducing _frameEndInset = frameThickness + frameBarEndInset as the fallback value. Also added a Widget End Inset slider in Settings → Frame → Border (default 0, range 0–20px) so users can add extra padding on top of frameThickness.

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that changes existing behavior)
• Refactor / internal cleanup
• Documentation
• Other

Related issues

Fixes #2597

Screenshots / video

Checklist

• My code follows the conventions in CONTRIBUTING.md
• I have tested my changes locally
• New user-facing strings are wrapped in I18n.tr() with translator context, reusing existing terms where possible
• Go changes: ran make fmt, added/updated tests, make test passes, and go mod tidy is clean
• QML changes: ran make lint-qml with no new warnings
• I have opened a corresponding pull request in dlx-docs to document any new behaviors: https://github.com/AvengeMedia/DankLinux-Docs