<!-- source-hash: 3e21cadfb28786c642e3ad430a4c2445 -->
Shared Storybook fixtures that supply realistic mock data for every chat entity-card docType in `CHAT_CARD_REGISTRY`, enabling designers to preview cards without running the chat runtime.

## Key Components

### Constants & Helpers

- **`NOW` / `DAY`** — Fixed timestamp anchor (`2026-05-28`) and millisecond day unit used to compute relative dates
- **`isoDaysAgo(days)`** — Utility that returns an ISO 8601 string N days before the anchor
- **`SAMPLE_AUTHOR`** — Reusable author object with name, avatar, and job title

### Exported Fixtures

| Export | Type | Description |
|---|---|---|
| `githubCommitItem` | `GitHubActivityItem` | Commit activity card fixture |
| `githubPullRequestItem` | `GitHubActivityItem` | Pull request card fixture |
| `githubPrReviewItem` | `GitHubActivityItem` | PR review card fixture |
| `slackMessageItem` | `SlackMessageItem` | Slack channel message fixture |
| `hubspotTicketItem` | `HubspotTicketItem` | High-priority HubSpot ticket fixture |
| `dataRoomDocItem` | `DataRoomDocCardItem` | Investor relations document fixture |
| `openframeDocsMarkdownItem` | `DataRoomDocCardItem` | Knowledge base article fixture |
| `financialKpiItem` | `GenericEntityCardItem` | ARR KPI card with badge and facts |
| `capTableItem` | `GenericEntityCardItem` | SAFE note cap table entry |
| `profitLossItem` | `GenericEntityCardItem` | Consolidated P&L card |
| `balanceSheetItem` | `GenericEntityCardItem` | Month-end balance sheet card |
| `cashFlowItem` | `GenericEntityCardItem` | Operating cash flow card |
| `blogPostSummary` | `BlogPostSummary` | Featured engineering blog post |
| `caseStudy` | `CaseStudy` | MSP customer success story with relations |
| `customerInterview` | `CustomerInterview` | Video interview with transcript fields |

## Usage Example

```typescript
import {
  githubCommitItem,
  hubspotTicketItem,
  financialKpiItem,
} from '@/stories/fixtures/chat-cards'

// Use directly in a Storybook story
export const HubSpotTicket: Story = {
  args: {
    item: hubspotTicketItem,
    href: hubspotTicketItem.url,
  },
}

// Or compose multiple fixtures into a feed story
export const MixedFeed: Story = {
  args: {
    items: [githubCommitItem, hubspotTicketItem, financialKpiItem],
  },
}
```

> **Note:** Server-only fields (status timestamps, AI processing flags, view counts) are populated with type-correct placeholder values. The card components do not read these at render time, but the wire types require them for TypeScript compliance.