- ThemeSwitcher: aria-expanded, aria-haspopup, aria-pressed on theme/accent buttons, Escape to close, dialog role
- ThinkingBlock: aria-expanded on toggle, region role on content
- ThinkingIndicator: role=status, aria-label, decorative icon aria-hidden
- ErrorBoundary: role=alert on error state
- SessionIcon: aria-hidden on decorative SVG brand icons
- Extract ThemeContext and ToolCollapseContext definitions into separate
files to satisfy react-refresh/only-export-components rule
- Move useTheme and useToolCollapse hooks to dedicated hook files
- Fix empty catch block in ThemeContext (add comment)
- Replace Date.now() ref in ThinkingIndicator with useState initializer
- Update all imports across components
Closes feedback #58
When the agent is reasoning with hidden thinking (thinking=low), show a
pulsing 'Reasoning...' indicator with elapsed time instead of generic
bouncing dots. Once text content starts streaming, falls back to the
regular streaming dots.
Closes feedback #40
