Palace Code is fully healthy. Self-heal audit complete — all clear.

**Results:**

| What was tested | Status |
|---|---|
| Page layout, title, Preact hydration | ✓ Pass |
| Split-panel layout, thread list, detail panel | ✓ Pass |
| Time window selector (1h/6h/12h/1d/3d/7d) | ✓ Pass |
| `/code/api/threads` — 4 threads returned | ✓ Pass |
| `/code/api/session-tails` — 5 entries returned | ✓ Pass |
| `/code/api/linear-issues` — 74 issues returned | ✓ Pass |
| `/code/api/attach-thread` (GET + POST) | ✓ Pass |
| `/code/api/update-thread`, `delete-thread` | ✓ Pass |
| `/code/api/sync-linear` | ✓ Pass |
| Session file reads for all 4 threads | ✓ Pass |

One expected behavior worth noting: the default "1d" window shows "No threads" because all current threads are 25-35 hours old. Switching to "3d" shows all 4 threads. That's correct, not a bug.