Forms, data, SaaS patterns and AI interfaces

New

• Forms: date and range pickers, currency, phone, tags, multi-select, stepper and signature pad.
• Data display: calendar, data table, charts, carousel, drawer and resizable panels.
• SaaS patterns: onboarding checklist, settings panel, usage meter, billing card, plan selector and notification center.
• AI interfaces: chat messages, reasoning, tool calls, citations, a prompt box, agent plans and approval cards.