* Add hover background to split action buttons
Split buttons (terminal, browser, split right/down) now show a subtle
rounded-rect background highlight on hover. Matches standard macOS
toolbar button behavior.
* Prevent fade overlays from bleeding into bottom separator
* Render bottom separator above fade overlays to prevent bleed
* Exclude drop zone from scroll fade threshold
* Revert button hover, fix fade threshold with 32pt buffer
* Fix right fade threshold: subtract drop zone, 4pt tolerance
* Add leading padding to split buttons, fix fade threshold
* Rework tab bar: full-width scroll with floating split buttons
* Use ultraThinMaterial blur for floating split buttons
* Make split buttons group full height
* Full-height split button blur background
* Inset split buttons from bottom separator
* Fix blur overlapping separator
* Use matching tab bar bg for split buttons, clear separator
* Use regularMaterial blur for split buttons
* Try thickMaterial for split buttons
* Fade gradient + solid barFill for floating split buttons
* Use extended right fade as split buttons backdrop
* Add 5 debug styles for split button background
* Add Split Button Style debug window to Debug menu
* Clean up: no-bg floating buttons, alphabetical debug menu
- Split buttons float with no background (tabBarBackground covers the
area, scroll padding prevents tabs from appearing behind buttons)
- Default splitButtonsWidth to 120 so first render has correct padding
- Remove split button style debug window and debug styles
- Alphabetize Debug Windows menu entries, remove dividers
* Revert to HStack sibling layout, add debug menu docs to CLAUDE.md
- Split buttons are HStack siblings of the ScrollView, not overlays.
Single .background() on parent, no compositing mismatch.
- Alphabetize Debug Windows menu, remove dividers.
- Document Debug menu in CLAUDE.md.
* Add Split Button Layout debug window with 5 switchable approaches
* Fix fade gradient color to match tab bar background
* Add fade color debug window with 6 color options
* Use mask for scroll fades, fixes color mismatch
* Hide scroll fades in minimal mode unless hovering
* Remove split buttons from layout when hidden in minimal mode
* Always show fades, overlay buttons to prevent scroll jump
* Add hover-only mask fade behind split buttons
* Reduce button mask area to 90pt
* Animate button mask smoothly
* Fade entire button group together via opacity
* Add blur behind buttons with fade mask
* Use theme barBackground for button backdrop
* Blur + theme tint for button backdrop
* More tint (0.85), less blur
* Tint 0.2, clear bottom border
* Use terminal bg color, add scroll trailing padding for buttons
* Less blur, paneBackground at 0.75 opacity
* paneBackground at 0.9 opacity
* 0.97 opacity for button backdrop
* Test: fully opaque paneBackground
* Test: solid red backdrop
* Gradient + solid paneBackground backdrop, no mask
* Force opaque paneBackground for button backdrop
* Use barBackground for button backdrop
* Use terminal bg (paneBackground forced opaque)
* Pre-composite backdrop color for exact match
* Add 6 switchable backdrop styles in debug window
* Mask-based button area hiding, no backdrop color needed
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Co-authored-by: Lawrence Chen <lawrencecchen@users.noreply.github.com>
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