fix: recorderStart 异步竞争条件

微信 RecorderManager.start() 是异步的，onStart 回调触发前
调用 stop() 会报 'operateRecorder:fail recorder not start'。

- 增加 recorderStarted 标志，onStart 时置 true
- 增加 pendingStop 标志，stop() 在 start 前被调用时延迟执行
- onError 时全面清理 pendingStop/recorderStarted/skipAsr 状态

zhiyin-app/src/pages/interview/interview.vue

@@ -157,6 +157,8 @@ const asrLoading = ref(false)
 let recorder = null
 let recordTimer = null
 let skipAsr = false
+let recorderStarted = false
+let pendingStop = false
 
 function initRecorder() {
   // #ifdef MP-WEIXIN
@@ -164,12 +166,20 @@ function initRecorder() {
   recorder = uni.getRecorderManager()
   recorder.onStart(() => {
     console.log('[Recorder] start recording')
+    recorderStarted = true
     recordingDuration.value = 0
     recordTimer = setInterval(() => { recordingDuration.value++ }, 1000)
+    if (pendingStop) {
+      pendingStop = false
+      recorder.stop()
+    }
   })
   recorder.onError((err) => {
     console.error('[Recorder] error:', JSON.stringify(err))
     isRecording.value = false
+    recorderStarted = false
+    pendingStop = false
+    skipAsr = false
     recordingDuration.value = 0
     asrLoading.value = false
     if (recordTimer) { clearInterval(recordTimer); recordTimer = null }
@@ -179,6 +189,7 @@ function initRecorder() {
   })
   recorder.onStop(async (res) => {
     isRecording.value = false
+    recorderStarted = false
     recordingDuration.value = 0
     if (recordTimer) { clearInterval(recordTimer); recordTimer = null }
     if (skipAsr) { skipAsr = false; return }
@@ -459,6 +470,10 @@ function stopRecord() {
     if (recordTimer) { clearInterval(recordTimer); recordTimer = null }
     recordingDuration.value = 0
   }
+  if (!recorderStarted) {
+    pendingStop = true
+    return
+  }
   recorder.stop()
 }
 </script>