Add Card atom component

- Create card component tokens (borderRadius, padding, shadow, border, background)
- Build Card component with elevated/outlined variants, interactive hover, padding presets
- Add MUI theme overrides using card tokens (shadow.md resting, border for outlined)
- Create 8 Storybook stories: Default, Variants, Interactive, PaddingPresets,
  PriceCardPreview, ServiceOptionPreview, WithImage, RichContent
- Regenerate token pipeline outputs (7 new card tokens)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

src/theme/generated/tokens.js

@@ -27,6 +27,13 @@ export const ButtonIconGapSm = "4px"; // 4px icon-text gap
 export const ButtonIconGapMd = "8px"; // 8px icon-text gap
 export const ButtonIconGapLg = "8px"; // 8px icon-text gap
 export const ButtonBorderRadiusDefault = "8px"; // 8px — standard button rounding
+export const CardBorderRadiusDefault = "8px"; // 8px — standard card rounding
+export const CardPaddingDefault = "24px"; // 24px — standard card padding (desktop)
+export const CardPaddingCompact = "16px"; // 16px — compact card padding (mobile, tight layouts)
+export const CardShadowDefault = "0 4px 6px rgba(0,0,0,0.07)"; // Medium shadow — resting elevated card
+export const CardShadowHover = "0 10px 15px rgba(0,0,0,0.1)"; // High shadow — interactive card on hover
+export const CardBorderDefault = "#e8e8e8"; // Neutral border for outlined cards
+export const CardBackgroundDefault = "#ffffff"; // White — standard card background (raised surface)
 export const InputHeightSm = "40px"; // Small — compact forms, admin layouts, matches Button medium height
 export const InputHeightMd = "48px"; // Medium (default) — standard forms, matches Button large for alignment
 export const InputPaddingXDefault = "12px"; // 12px — inner horizontal padding matching Figma design