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/types.ts

@@ -17,6 +17,8 @@ export interface ActivityItem {
   tone: 'error' | 'info' | 'warn'
 }
 
+export type SubagentStatus = 'completed' | 'error' | 'failed' | 'interrupted' | 'queued' | 'running' | 'timeout'
+
 export interface SubagentProgress {
   apiCalls?: number
   costUsd?: number
@@ -36,7 +38,7 @@ export interface SubagentProgress {
   parentId: null | string
   reasoningTokens?: number
   startedAt?: number
-  status: 'completed' | 'failed' | 'interrupted' | 'queued' | 'running'
+  status: SubagentStatus
   summary?: string
   taskCount: number
   thinking: string[]