v0.5.7 - iOS Safe Area & Component Refactoring

Bug Fixes

• Fix iOS safe-area handling for dialogs and sheets to prevent status bar overlap
• Use inline styles for reliable safe-area padding across CSS cascade
• Add mobile-first positioning for large dialogs to support safe area

New Features

• Add FullscreenSheet component with built-in safe-area support
• Add PageHeader component for centralized header styling
• Add ListToolbar component for search/select/delete UI patterns
• Add Header compound component (Header.Root, Header.Title, etc.)
• Add mobileFullscreen prop to DialogContent for adaptive dialog sizing

Improvements

• Extract ListToolbar and Header components for reuse across app
• Refactor SessionList and RepoList to use new ListToolbar component
• Centralize iOS safe area handling with single PageHeader fix point
• Update all fullscreen dialogs/sheets to use FullscreenSheet or pt-safe
• Add pt-safe class to ModelSelectDialog, RepoMcpDialog, EditSessionTitleDialog

Testing

• Add TDD test infrastructure (vitest config, testing-library, jsdom)
• Add 232 tests for DialogContent and PageHeader behavior
• Add mobile delete confirmation with select all/deselect all options

Files Changed

• 34 files changed, 1627 insertions(+), 986 deletions(-)
• Components extracted: ListToolbar, Header, PageHeader, FullscreenSheet
• Components removed: Header.tsx, RepoDetailHeader.tsx, SessionDetailHeader.tsx