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.css

@@ -223,6 +223,11 @@
   --fa-button-icon-gap-md: var(--fa-spacing-2); /** 8px icon-text gap */
   --fa-button-icon-gap-lg: var(--fa-spacing-2); /** 8px icon-text gap */
   --fa-button-border-radius-default: var(--fa-border-radius-md); /** 8px — standard button rounding */
+  --fa-card-border-radius-default: var(--fa-border-radius-md); /** 8px — standard card rounding */
+  --fa-card-padding-default: var(--fa-spacing-6); /** 24px — standard card padding (desktop) */
+  --fa-card-padding-compact: var(--fa-spacing-4); /** 16px — compact card padding (mobile, tight layouts) */
+  --fa-card-shadow-default: var(--fa-shadow-md); /** Medium shadow — resting elevated card */
+  --fa-card-shadow-hover: var(--fa-shadow-lg); /** High shadow — interactive card on hover */
   --fa-input-padding-x-default: var(--fa-spacing-3); /** 12px — inner horizontal padding matching Figma design */
   --fa-input-padding-y-sm: var(--fa-spacing-2); /** 8px — compact vertical padding for small size */
   --fa-input-padding-y-md: var(--fa-spacing-3); /** 12px — standard vertical padding for medium size */
@@ -351,4 +356,6 @@
   --fa-typography-overline-sm-font-family: var(--fa-font-family-body);
   --fa-typography-overline-sm-font-size: var(--fa-font-size-2xs); /** 11px — accessibility floor */
   --fa-typography-overline-sm-font-weight: var(--fa-font-weight-semibold);
+  --fa-card-border-default: var(--fa-color-border-default); /** Neutral border for outlined cards */
+  --fa-card-background-default: var(--fa-color-surface-raised); /** White — standard card background (raised surface) */
 }