fix(tui): handle timeout/error subagent statuses in /agents (#26687)

Accept delegation timeout/error statuses in the TUI subagent model, normalize unknown status strings defensively, and harden /agents overlay rendering/sorting so unknown statuses cannot crash glyph/color lookup. Add regression tests for live event normalization and disk snapshot replay.

ui-tui/src/components/thinking.tsx

@@ -327,7 +327,11 @@ function SubagentAccordion({
   const aggregate = node.aggregate
 
   const statusTone: 'dim' | 'error' | 'warn' =
-    item.status === 'failed' ? 'error' : item.status === 'interrupted' ? 'warn' : 'dim'
+    item.status === 'error' || item.status === 'failed'
+      ? 'error'
+      : item.status === 'interrupted' || item.status === 'timeout'
+        ? 'warn'
+        : 'dim'
 
   const prefix = item.taskCount > 1 ? `[${item.index + 1}/${item.taskCount}] ` : ''
   const goalLabel = item.goal || `Subagent ${item.index + 1}`