Components: Choice inputs (incl. API select, BML payment selector) #12

REQUIREMENTS §22 (Choice inputs), R16.5 (API select), R16.8 (payment method selector).

• Select
• Searchable select
• Dependent select
• API select (all of R16.5; TanStack Query with internal fallback client)
• Editable select
• Multi-select
• Dual listbox
• Checkbox
• Radio
• Radio group
• Switch
• Segmented control
• Range slider
• Rating
• Payment method selector (BML Transfer, BML Connect)
• Account switcher
• Image select
• Select with quick-create

Merged into claude/amazing-cerf-htnpm8. 143 tests; coverage 98.6% lines / 91.8% branches.

Follow-ups:

• Figma components + Code Connect (Figma kit & token sync #29)
• BML logos/assets from BML (placeholder icon until supplied)
• Plain Select as bottom sheet on phones (combobox selects already do)