1.0.5.2 Primitive components — Button, Input, Textarea, Card, Modal, Pill, Tooltip, Toast, Spinner

Estimate: 35m · Depends on: 1.0.5.1

Build the React primitive components that every screen will compose from. Nine primitives cover almost everything Motir's UI needs: Button (4 variants), Input, Textarea, Card, Modal, Pill / Tag, Tooltip, Toast, Spinner. Each must use only the tokens from 1.0.5.1 — never hardcoded values — so a future theme tweak propagates through one source.

Why this is the biggest Subtask in Story 1.0.5: primitives are the foundation of every later UI Subtask in the entire project. Getting them right (accessible, consistent, composable) saves work in every Subtask that touches the UI; getting them wrong propagates problems for months. This Subtask deserves the most attention in the story.

What you'll do: For each primitive, create a file under /components/ui/<Name>.tsx with a typed props interface, all variants implemented, and full keyboard / aria support. Use class-variance-authority for variant management and tailwind-merge for class composition (the modern React + Tailwind primitive pattern). Render every variant + state of every primitive on the /app/_tokens/page.tsx route from 1.0.5.1 as a living style guide.

Acceptance criteria

• Button: variants primary | secondary | ghost | danger × sizes sm | md | lg × states default | hover | active | focus | disabled | loading. Loading state shows the Spinner inline.
• Input, Textarea: with label, error message, helper text, disabled state, prefix/suffix slots.
• Card: with optional header / footer slots, hover state, optional clickable mode (wraps in <a> or button).
• Modal: accessible (focus trap, ESC closes, click-outside closes, returns focus on close), supports a header / body / footer slot pattern.
• Pill / Tag: variants for status (planned / in-progress / done) and severity (info / warn / danger / success).
• Tooltip: appears on hover + focus, sensible positioning, accessible name on the trigger.
• Toast: stackable, auto-dismiss with hover-to-pause, variants (info / success / warn / error).
• Spinner: 3 sizes; works inside Button and as standalone.
• Every primitive uses ONLY tokens from globals.css — zero hardcoded hex / px values.
• /app/_tokens/page.tsx renders all primitives × all variants × key states as a single specimen page.
• Each primitive has a brief JSDoc @example comment with a minimal usage sample.

Context refs

• /app/globals.css (from 1.0.5.1) — the token source
• tailwind.config.ts (from 1.0.5.1) — the Tailwind theme
• awesome-design-md — open-source component-pattern corpus, fetched at prompt-gen time
• Radix UI primitives docs (URL) — for the unstyled accessibility primitives we can wrap (Modal, Tooltip, Toast)
• cva + tailwind-merge docs