Add Switch and Radio atom components

Switch:
- Wraps MUI Switch with FA brand tokens
- Bordered pill track (Figma Style One), brand.500 fill when active
- 4 component tokens: track width/height/borderRadius, thumb size
- Stories include interactive service add-ons demo

Radio:
- Wraps MUI Radio with FA brand tokens
- Brand.500 fill when selected, neutral.400 unchecked
- 2 component tokens: outer size, dot size
- Stories include card selection and payment method patterns

Also:
- Added ColourToggle and Slider to component registry (deferred)
- Updated token registry and session log

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

src/theme/generated/tokens.js

@@ -72,6 +72,12 @@ export const InputFontSizeDefault = "1rem"; // 16px — prevents iOS auto-zoom o
 export const InputBorderRadiusDefault = "4px"; // 4px — subtle rounding, consistent with Figma design
 export const InputGapDefault = "8px"; // 8px — vertical rhythm between label/input/helper, slightly more generous than Figma's 6px for readability
 export const InputIconSizeDefault = "20px"; // 20px — icon size inside input field, matches Figma trailing icon
+export const RadioSizeDefault = "20px"; // Default radio size — matches Figma 16px + padding for 44px touch target area
+export const RadioDotSizeDefault = "10px"; // Selected indicator dot — 50% of outer size
+export const SwitchTrackWidth = "44px"; // Track width — slightly narrower than Figma 52px for better proportion with 44px touch target
+export const SwitchTrackHeight = "24px"; // Track height
+export const SwitchTrackBorderRadius = "9999px"; // Pill shape
+export const SwitchThumbSize = "18px"; // Thumb diameter — sits inside the track with 3px inset
 export const ColorBrand50 = "#fef9f5"; // Lightest warm tint — warm section backgrounds
 export const ColorBrand100 = "#f7ecdf"; // Light warm — hover backgrounds, subtle fills
 export const ColorBrand200 = "#ebdac8"; // Warm light — secondary backgrounds, divider tones