Phase 5: search/recall view (forum style)

Part of #339

- `css/pages/recall.css` + `js/pages/recall.js`
- Search bar + recall button in forum style
- Results as forum table rows (score, type icon, memory, salience, links, created)
- Column headers, stats bar (count, latency, hops)
- Feedback buttons preserved
- Remember form preserved
- Synthesize toggle preserved