test(agent-map): guard completion burst paint budget

src/renderer/src/components/dashboard-popout/AgentMapStatusGlow.test.tsx

@@ -1,8 +1,8 @@
 // @vitest-environment happy-dom
 
 import '@testing-library/jest-dom/vitest'
-import { describe, expect, it } from 'vitest'
-import { card, installAgentMapEnvironment, renderMap } from './agent-map-render-test-harness'
+import { describe, expect, it, vi } from 'vitest'
+import { card, installAgentMapEnvironment, NOW, renderMap } from './agent-map-render-test-harness'
 
 describe('AgentMap status glow', () => {
   installAgentMapEnvironment()
@@ -29,4 +29,27 @@ describe('AgentMap status glow', () => {
       expect(glow).not.toBeInTheDocument()
     }
   )
+
+  it('caps a 200-completion burst at four flares without dropping static emphasis', () => {
+    const clock = vi.spyOn(Date, 'now').mockReturnValue(NOW)
+    const { container } = renderMap(
+      Array.from({ length: 200 }, (_, index) =>
+        card({
+          paneKey: `pane-${index}`,
+          ptyId: `pty-${index}`,
+          leafId: `leaf-${index}`,
+          bucket: 'done',
+          dotState: 'done',
+          unseen: true,
+          stateChangedAt: NOW
+        })
+      )
+    )
+    clock.mockRestore()
+
+    expect(container.querySelectorAll('[data-agent-map-agent-finish-flare]')).toHaveLength(4)
+    expect(container.querySelectorAll('[data-agent-map-agent-status-glow]')).toHaveLength(200)
+    expect(container.querySelectorAll('.fleet-status-done .agent-map-agent-mark')).toHaveLength(200)
+    expect(container.querySelectorAll('[data-agent-unread-marker]')).toHaveLength(200)
+  })
 })