fix(runtime): stage runtime installs strictly, time out only on stalls, and make reinstall actually reinstall

apps/desktop/tests/unit/stt-tab-subscriptions-redteam-r1-8.test.ts

@@ -0,0 +1,62 @@
+// tests/unit/stt-tab-subscriptions-redteam-r1-8.test.ts
+// STT 탭 언마운트 시 모든 진행률 구독이 해제되는지 (runtime:progress 리스너 누수 회귀).
+
+import { describe, it, expect } from 'vitest'
+import { readFileSync } from 'node:fs'
+import { join } from 'node:path'
+import { subscribeSttTabEvents } from '../../src/renderer/components/stt/sttTabSubscriptions'
+
+type Listener = (event: number) => void
+
+function fakeChannel(): { subscribe: (cb: Listener) => () => void; listeners: Set<Listener> } {
+  const listeners = new Set<Listener>()
+  return {
+    listeners,
+    subscribe: (cb) => {
+      listeners.add(cb)
+      return () => {
+        listeners.delete(cb)
+      }
+    },
+  }
+}
+
+describe('subscribeSttTabEvents', () => {
+  it('마운트·언마운트를 반복해도 리스너가 쌓이지 않는다', () => {
+    const download = fakeChannel()
+    const runtime = fakeChannel()
+
+    for (let mount = 0; mount < 12; mount += 1) {
+      const cleanup = subscribeSttTabEvents(
+        { onDownloadProgress: download.subscribe, onRuntimeProgress: runtime.subscribe },
+        { onDownloadProgress: () => undefined, onRuntimeProgress: () => undefined },
+      )
+      expect(download.listeners.size).toBe(1)
+      expect(runtime.listeners.size).toBe(1)
+      cleanup()
+    }
+
+    expect(download.listeners.size).toBe(0)
+    expect(runtime.listeners.size).toBe(0)
+  })
+
+  it('cleanup 을 두 번 불러도 안전하다 (StrictMode 이중 호출)', () => {
+    const download = fakeChannel()
+    const runtime = fakeChannel()
+    const cleanup = subscribeSttTabEvents(
+      { onDownloadProgress: download.subscribe, onRuntimeProgress: runtime.subscribe },
+      { onDownloadProgress: () => undefined, onRuntimeProgress: () => undefined },
+    )
+    cleanup()
+    expect(() => cleanup()).not.toThrow()
+  })
+
+  it('STTTab 은 진행률 이벤트를 이 헬퍼로만 구독한다 (개별 구독 + 누락된 해제 재발 방지)', () => {
+    const source = readFileSync(
+      join(__dirname, '../../src/renderer/components/STTTab.tsx'),
+      'utf8',
+    )
+    expect(source).toContain('return subscribeSttTabEvents(')
+    expect(source).not.toMatch(/const\s+unsub\w*\s*=\s*window\.electronAPI\.(stt|runtime)\.on/)
+  })
+})