# Test Report: Phase 5 — Rich Content Block-Renderer

## Task
Implement Frontend Rich Content Block-Renderer Components for Unified Messaging System.

## Files Created

| File | Lines | Purpose |
|------|-------|---------|
| `BlockRenderer.tsx` | 75 | Main dispatcher — switches on `block_type`, renders appropriate sub-renderer, fallback for unknown types |
| `MarkdownBlock.tsx` | 59 | Renders Markdown via `react-markdown` (already installed), custom component styling |
| `HtmlBlock.tsx` | 45 | Renders sanitized HTML via `dangerouslySetInnerHTML` — strips `<script>`, `on*` handlers, `javascript:` URLs |
| `ImageBlock.tsx` | 35 | Renders image with alt caption, optional width, opens in new tab on click |
| `AudioBlock.tsx` | 41 | Renders `<audio>` player with controls, shows formatted duration |
| `VideoBlock.tsx` | 30 | Renders `<video>` player with controls, optional thumbnail poster |
| `FileBlock.tsx` | 85 | Renders file card with icon, name, size, download link |
| `ActionCardBlock.tsx` | 62 | Renders interactive card with title, body, action buttons (primary/secondary styling) |
| `ContactCardBlock.tsx` | 52 | Renders contact reference card with avatar initials, links to `/contacts/{id}` |
| `MiniAppBlock.tsx` | 50 | Renders placeholder for mini-apps with app_id and config details |
| `index.ts` | 10 | Barrel export for all components |

**Total: 544 lines across 11 files**

## Files Modified

| File | Change |
|------|--------|
| `MessageSidebar.tsx` | Added `BlockRenderer` import; replaced inline block rendering (40 lines) with `<BlockRenderer blocks={msg.blocks} />` (6 lines) |

## TypeScript Compilation Check

```
cd /a0/usr/workdir/leocrm-fix/frontend && npx tsc --noEmit 2>&1 | grep -E 'comm/blocks|MessageSidebar'
→ No errors in block components or MessageSidebar
```

### Pre-existing errors (NOT introduced by this task):
- `src/pages/Dms.tsx(553,13)`: `onRangeSelect` prop mismatch in `FileExplorerProps` — pre-existing, unrelated.

## Backend Compatibility

All block types match `content_types.py` definitions:
- `text` → `block_data.text`
- `markdown` → `block_data.markdown` (also falls back to `block_data.content`)
- `html` → `block_data.html`
- `image` → `block_data.url`, `block_data.alt`, `block_data.width`
- `audio` → `block_data.url`, `block_data.duration`
- `video` → `block_data.url`, `block_data.thumbnail`
- `file` → `block_data.url`, `block_data.name`, `block_data.size`
- `action_card` → `block_data.title`, `block_data.body`, `block_data.actions`
- `contact_card` → `block_data.contact_id`, `block_data.name`
- `miniapp` → `block_data.app_id`, `block_data.config`

## Smoke Test

- **TypeScript**: `npx tsc --noEmit` passes with zero new errors from block components.
- **Import chain**: `BlockRenderer` imports all 9 sub-renderers + types from `@/store/commStore` — all resolve correctly.
- **MessageSidebar integration**: Inline block rendering replaced with `<BlockRenderer>` component — compiles cleanly.
- **Barrel export**: `index.ts` exports all 10 components for clean imports.

## Notes

- `react-markdown` was already in `package.json` (`^10.1.0`) — used directly.
- HTML sanitization is minimal (regex-based). For production, consider `DOMPurify`.
- Unknown block types render a fallback message ("Unbekannter Block-Typ: {type}") per spec.
- Blocks are sorted by `sort_order` before rendering.
