Moved all 17 components from ui/ into atomic design tiers: atoms (Button,
IconButton, Input, Textarea, Select, Checkbox, Radio, Switch, Badge, Tag,
Chip, Tooltip) and molecules (Alert, Accordion, Card, Dialog, Popover).
Updated all Storybook titles and cross-component imports. Changed Input
icons to primary-dark and replaced palette token references with semantic
tokens.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
