✨ feat(a11y): add accessibility settings and theme improvements

Add comprehensive accessibility support across shared packages:
- A11y store with contrast, colorblind mode, and reduce motion settings
- A11yQuickToggles and A11ySettings UI components
- PillNavigation and PillDropdown components in shared-ui
- Calendar app updates to integrate new theme/a11y features

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

packages/shared-theme-ui/src/index.ts

@@ -3,14 +3,24 @@ export { default as ThemeToggle } from './ThemeToggle.svelte';
 export { default as ThemeSelector } from './ThemeSelector.svelte';
 export { default as ThemeModeSelector } from './ThemeModeSelector.svelte';
 
-// New Components
+// Theme Components
 export { default as ThemeColorPreview } from './components/ThemeColorPreview.svelte';
 export { default as ThemeCard } from './components/ThemeCard.svelte';
 export { default as ThemeGrid } from './components/ThemeGrid.svelte';
 
+// A11y Components
+export { default as A11ySettings } from './components/A11ySettings.svelte';
+export { default as A11yQuickToggles } from './components/A11yQuickToggles.svelte';
+
 // Pages
 export { default as ThemePage } from './pages/ThemePage.svelte';
 
 // Types
-export type { ThemeStatus, ThemeCardData, ThemePageProps, ThemePageTranslations } from './types';
-export { defaultTranslations } from './types';
+export type {
+	ThemeStatus,
+	ThemeCardData,
+	ThemePageProps,
+	ThemePageTranslations,
+	A11yTranslations,
+} from './types';
+export { defaultTranslations, defaultA11yTranslations } from './types';