Feat/floating bar edge radius

[tibssy]

Pull Request

Motivation

This PR refines floating bar corner rendering when the bar touches a screen edge, so attached sides no longer keep inappropriate rounding and now behave consistently across all bar positions and orientations. It also introduces a new setting that allows optional outer rounding on the touching edge for users who prefer that style. To prevent visual artifacts, the outer rounding is only applied when there is enough opposite-side margin based on the container radius and screen corner radius thresholds.

Type of Change

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• Bug fix
• New feature
• Breaking change
• Refactoring

Related Issue

• Closes #(issue number) (if any)

Testing

Describe how you tested your changes and mark the relevant items.

• Tested on niri
• Tested on Hyprland
• Tested on sway
• Tested with different bar positions and density settings
• Tested at different interface scaling values
• Tested with multiple monitors (if applicable)

Screenshots / Videos

recording_20260330_005527.mp4

Checklist

• Code follows project style guidelines
• Self-reviewed my code
• No new warnings or errors
• Documentation or comments updated (if relevant)

Additional Notes

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