fix(ui): guard invalid log detail timestamps

ui/tests/unit/ui/components/logs-detail-panel.test.tsx

@@ -0,0 +1,27 @@
+import { render, screen } from '@tests/setup/test-utils';
+import { describe, expect, it } from 'vitest';
+import { LogsDetailPanel } from '@/components/logs/logs-detail-panel';
+import type { LogsEntry } from '@/lib/api-client';
+
+function buildEntry(overrides: Partial<LogsEntry> = {}): LogsEntry {
+  return {
+    id: 'entry-1',
+    timestamp: '2026-04-07T11:00:00.000Z',
+    level: 'info',
+    source: 'dashboard',
+    event: 'logs.bootstrap',
+    message: 'Dashboard log entry',
+    processId: 25582,
+    runId: 'run-1',
+    ...overrides,
+  };
+}
+
+describe('LogsDetailPanel', () => {
+  it('falls back to the raw timestamp when the selected log entry has an invalid timestamp', () => {
+    render(<LogsDetailPanel entry={buildEntry({ timestamp: 'not-a-date' })} />);
+
+    expect(screen.getByText('not-a-date')).toBeInTheDocument();
+    expect(screen.getByTitle('not-a-date')).toHaveTextContent('not-a-date');
+  });
+});