fix: NIT 合并——开场朗读 onEnd 驱动自动进入（防 3s 截断）/continuePlay 空守卫/gotoResult 防双跳/计时器卸载清理

ui-src/src/components/SceneTheater.vue

@@ -79,11 +79,32 @@ export default {
   },
   mounted() {
     this.speaking = true
-    speak(this.content, this.audio)
-    // v2.1：朗读结束自动进入决策幕（「跳过」仍可手动跳过）
-    setTimeout(() => { this.speaking = false; this.$emit('done') }, Math.min(3000, this.content.length * 300))
+    // v2.1：朗读结束自动进入决策幕——最短展示 1.2s，之后 speak onEnd 即进入；
+    // 无 TTS/onEnd 缺失最迟 15s 兜底（「跳过」仍可手动跳过）
+    this.speechDone = false
+    this.ready = false
+    let done = false
+    const finishAuto = () => {
+      if (done) return
+      done = true
+      this.speaking = false
+      this.$emit('done')
+    }
+    this.minTimer = setTimeout(() => { this.ready = true; if (this.speechDone) finishAuto() }, 1200)
+    this.autoTimer = setTimeout(finishAuto, 15000)
+    const onSpeechEnd = () => {
+      this.speechDone = true
+      if (this.ready) finishAuto()
+    }
+    if (!this.content) {
+      finishAuto()
+      return
+    }
+    speak(this.content, this.audio, onSpeechEnd)
   },
   beforeUnmount() {
+    clearTimeout(this.minTimer)
+    clearTimeout(this.autoTimer)
     stopSpeak()
   },
   methods: {