* Add sidebar blur effect with withinWindow blending
- Add NSVisualEffectView-based blur backdrop for sidebar
- Support withinWindow blending mode to blur terminal content behind sidebar
- Auto-switch to overlay layout when withinWindow mode is selected
- Add sidebar debug panel with material, blending, tint, and opacity controls
- Add preset options (HUD Glass, Popover Glass, etc.)
- Default to HUD Glass preset with withinWindow blur
* Simplify tab close button visibility and remove hover background
Show close button only on hover instead of when active/multi-selected.
Remove the hover background color from tabs for cleaner appearance.
* Add config reload support with notification system
- Add reloadConfiguration() methods for app-wide and per-surface reload
- Handle GHOSTTY_ACTION_RELOAD_CONFIG action from Ghostty
- Add ghosttyConfigDidReload notification for views to react
- TerminalSplitTreeView reloads GhosttyConfig on notification
- Add openConfigurationInTextEdit() helper
- Fix activeMainWindow() to correctly find main window
* Add custom tab titles and pinned tabs support
- Add customTitle and isPinned properties to Tab
- Separate process title from custom title with applyProcessTitle()
- Add setCustomTitle()/clearCustomTitle() for user-defined tab names
- Add togglePin()/setPinned() with automatic reordering
- Pinned tabs stay at the top, new tabs insert after pinned section
- moveTabToTop/moveTabsToTop respect pinned tab ordering
* Add --panel option to new-split command
- CLI: Parse --panel <id|index> option for new-split
- Controller: Resolve panel argument to split specific surface
- Return new panel UUID on successful split creation
* Fix notifications popover positioning with layout-aware anchor
- Use AnchorNSView with layout callback for reliable positioning
- Force layout before showing popover to ensure current geometry
- Convert anchor bounds to window content view coordinates
- Add fallback positioning near top-left when anchor unavailable
- Fix button hit testing with explicit frame and contentShape
* Improve app termination in reload script
Use osascript to gracefully quit by bundle ID before pkill fallback.
Add more robust pkill patterns to catch instances from any DerivedData path.
* Add sidebar blur effect with live-adjustable glass settings
- Add WindowGlassEffect for window-level NSGlassEffectView (macOS 26+)
- Add SidebarBackdrop with configurable material, blend mode, tint, and opacity
- Add Sidebar Debug panel (Debug menu) for live adjustment of sidebar appearance
- Add Background Debug panel for window glass tint settings
- Support both behindWindow and withinWindow blur modes
- Live tint updates without requiring window reload
* Align titlebar text to left edge of content area
