fix(voice): stop mic-test ref stealing, unblock action queue, keep tail audio, and move context/LLM routing behind ports and pure policies

apps/desktop/src/main/ipc/audio-handlers.ts

@@ -3,7 +3,7 @@
 import { ipcMain } from 'electron'
 import { IPC_CHANNELS } from '@d3ro/core/ipc-channels'
 import { ipcSuccess, ipcError, ErrorCode } from '@d3ro/core/errors'
-import { getAudioCaptureService, calculateRMS } from '../services/AudioCaptureService'
+import { getAudioCaptureService, calculateRMS, type CaptureLease } from '../services/AudioCaptureService'
 import { getMainWindow } from '../windows/WindowManager'
 import { configGet, configSet } from '../services/ConfigService'
 import type { SetDeviceParams } from '@d3ro/core/types'
@@ -12,6 +12,11 @@ let testTimer: ReturnType<typeof setTimeout> | null = null
 let testAudioHandler: ((payload: { buffer: Buffer; timestamp: number }) => void) | null = null
 let testLevelInterval: ReturnType<typeof setInterval> | null = null
 let testLastRms = 0
+/**
+ * 테스트가 실제로 잡은 캡처 참조. 테스트가 돌고 있지 않을 때 stop() 을 부르면 회의·자막·받아쓰기가
+ * 잡고 있는 참조를 빼앗아 그쪽 마이크가 조용히 끊긴다 — 테스트는 자기 임대만 놓는다.
+ */
+let testLease: CaptureLease | null = null
 
 function stopAudioTest(): void {
   const service = getAudioCaptureService()
@@ -28,7 +33,9 @@ function stopAudioTest(): void {
     testTimer = null
   }
   testLastRms = 0
-  service.stop().catch(() => { /* ignore */ })
+  const lease = testLease
+  testLease = null
+  lease?.release().catch(() => { /* ignore */ })
 }
 
 export function registerAudioHandlers(): void {
@@ -62,7 +69,7 @@ export function registerAudioHandlers(): void {
       stopAudioTest()
 
       const service = getAudioCaptureService()
-      await service.start()
+      testLease = await service.acquire()
 
       // 오디오 데이터에서 RMS 추적
       testAudioHandler = (payload: { buffer: Buffer; timestamp: number }) => {