diff --git a/app/src/main/java/com/k2fsa/sherpa/onnx/LlmEngine.kt b/app/src/main/java/com/k2fsa/sherpa/onnx/LlmEngine.kt
index d9d947d..f5f61fe 100644
--- a/app/src/main/java/com/k2fsa/sherpa/onnx/LlmEngine.kt
+++ b/app/src/main/java/com/k2fsa/sherpa/onnx/LlmEngine.kt
@@ -113,6 +113,8 @@ class LlmEngine(
     /**
      * 阻塞式生成(仅供摘要后台线程调用)。返回模型输出文本(不含输入)。
      * temperature=0 为 Greedy。abort() 可从其它线程安全打断。
+     * repeatPenalty>1 启用重复惩罚(翻译路径传 1.1 治 1B 复读循环;
+     * 摘要路径保持默认 0=关闭,行为与已验证版本一致)。
      */
     fun generate(
         systemPrompt: String,
@@ -121,11 +123,12 @@ class LlmEngine(
         temperature: Float = 0f,
         topK: Int = 64,
         topP: Float = 0.95f,
+        repeatPenalty: Float = 0f,
     ): String {
         require(ptr != 0L) { "LlmEngine already released" }
         return nativeGenerate(
             ptr, renderChatPrompt(systemPrompt, userPrompt, chatTemplate),
-            maxNewTokens, temperature, topK, topP
+            maxNewTokens, temperature, topK, topP, repeatPenalty
         )
     }
 
@@ -155,7 +158,7 @@ class LlmEngine(
 
     private external fun nativeGenerate(
         ptr: Long, prompt: String, maxNewTokens: Int,
-        temperature: Float, topK: Int, topP: Float
+        temperature: Float, topK: Int, topP: Float, repeatPenalty: Float
     ): String
 
     private external fun nativeAbort(ptr: Long)
diff --git a/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt b/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
index 26aedba..ea8ac62 100644
--- a/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
+++ b/app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt
@@ -18,6 +18,7 @@ import android.text.Spanned
 import android.text.TextPaint
 import android.text.method.LinkMovementMethod
 import android.text.method.ScrollingMovementMethod
+import android.text.style.BackgroundColorSpan
 import android.text.style.ClickableSpan
 import android.text.style.ForegroundColorSpan
 import android.text.style.RelativeSizeSpan
@@ -84,7 +85,9 @@ class MainActivity : AppCompatActivity() {
     ) {
         var line: SubtitleLine? = null
         var refined: Boolean = false   // false => 底稿(第一遍)未被精修覆盖
-        var trans: String? = null      // 定稿后的界面语言译文(批次二:双语字幕)
+        var trans: String? = null      // 点击翻译缓存(界面语言);原文变化时置空
+        var transVisible: Boolean = true  // 点击在已缓存译文上收起/展开
+        var transPending: Boolean = false // 在途翻译占位(句下显示"翻译中…")
     }
 
     private class SubtitleLine(
@@ -157,8 +160,11 @@ class MainActivity : AppCompatActivity() {
     // models dir (preferred) or at the ROOT of assets/. Download:
     // https://github.com/k2-fsa/sherpa-onnx/releases/tag/speaker-recongition-models
     private val speakerModels = listOf(
-        "3dspeaker_speech_eres2netv2_sv_zh-cn_16k-common.onnx",        // more accurate
-        "3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx",  // smaller fallback
+        // 主选:CAM++ 7.1M,中英训练,3D-Speaker 榜单 EER 优于 eres2net 系,
+        // v1.13 声纹提取器架构无关(读 ONNX 元数据),换文件即生效
+        "3dspeaker_speech_campplus_sv_zh_en_16k-common_advanced.onnx",
+        "3dspeaker_speech_eres2netv2_sv_zh-cn_16k-common.onnx",        // accurate fallback
+        "3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx",  // smaller/faster
     )
     private var activeSpeakerModel: String? = null
     private val speakerThreshold = 0.5f
@@ -203,6 +209,13 @@ class MainActivity : AppCompatActivity() {
     private val judgeMinSamples = 48000
     private val enableRollingSwitch = true  // A/B 诊断:关掉=只用自然 endpoint 断句
     @Volatile private var rollingLowHits = 0
+    // 无缝插话确证(2026-09-15):SUSPECT 等停顿会被"对方话没停就接话"憋死
+    // (日志实锤:simA 连4窗 0.14~0.19,SUSPECT 连 armed 三次全 expired,
+    // silenceRun=0/4800)。连续第 2 个低分窗 = 约 4~6s 持续异人声纹,
+    // 不再等停顿,直接强判 endpoint 断句。单窗毛刺(音量/瞬时)攒不满 2。
+    @Volatile private var rollingLowStreak = 0
+    @Volatile private var pendingForceEndpoint = false
+    private val forceSwitchStreaks = 2
     // C(最新者胜):每次投递滚动检测都刷新序号,队列里被超额的旧任务直接跳过
     @Volatile private var rollingSeq = 0L
     // 兜底残料:当前句子槽位最近一次滚动窗口声纹。整句判定因碎片算不出
@@ -295,34 +308,21 @@ class MainActivity : AppCompatActivity() {
     // generate 阻塞在 native,取消靠 abort;引擎只在摘要线程持有
     @Volatile private var summarizeEngine: LlmEngine? = null
 
-    // ---- 字幕双语翻译(批次二,2026-09-14)--------------------------------
-    // 独立翻译模型:Gemma-3-1B-it Q4_K_M(arch gemma3,.so 已支持,模板分支
-    // renderGemma3Prompt 现成)。定稿后句级翻译,原文+小字译文双语显示;
-    // 界面语言与句子语言一致时不翻;模型文件缺失 → 功能静默关闭(自然降级)。
+    // ---- 点击字幕句翻译(原"批次二自动双语",2026-09-15 改造)-----------------
+    // 独立翻译模型:Gemma-3-1B-it Q4_K_M(arch gemma3,模板 renderGemma3Prompt)。
+    // 不再自动翻译:点击某句 → 带同轮上下文译该句,译文行内小字斜体挂在句下,
+    // 再点收起(缓存于 Sentence.trans,原文变化时失效)。首次点击懒加载引擎,
+    // 每次翻译按防污染协议重建引擎;闲置 60s 自动卸载。模型文件缺失 → toast 提示。
     private val translateModelDirName = "gemma-3-1b-it"
     private val translateGgufName = "gemma-3-1b-it-Q4_K_M.gguf"
     private val translateIdleUnloadMs = 60_000L
     private val translateThread = HandlerThread("translate").also { it.start() }
     private val translateHandler by lazy { Handler(translateThread.looper) }
     @Volatile private var translateEngine: LlmEngine? = null
-    private var translateDisabled = false
-    // KV 污染 workaround(2026-09-14,不改 .so):nativeGenerate 不清 KV,
-    // 同引擎连续 generate 会复读上一条 → 每"批"generate 前重建引擎。
-    // 初译从逐句改为小批量编号翻译(凑 4 句或 2.5s 定时封批)。
-    private val initialBatchMax = 1   // 逐句直出:多句JSON批的格式/复读风险一并消除
-    private val initialBatchDelayMs = 2_500L
-    private val initialPending = ArrayList<Pair<Long, String>>()
-    private var initialBatchTimer: Runnable? = null
-    private val translatedSids = HashSet<Long>()                    // 每槽只翻一次
-    // 失败重试预算:每句最多 2 次,温度递进(0→0.3→0.7),贪心死路可被跳出。
-    // 仅在翻译线程读写,无并发。
-    private val translateAttempts = HashMap<Long, Int>()
-
-    private fun bumpAttempt(sid: Long): Int {
-        val n = (translateAttempts[sid] ?: 0) + 1
-        translateAttempts[sid] = n
-        return n
-    }
+    // 一次只允许一个在途翻译(排队期间后续点击 toast"请稍候")
+    @Volatile private var transBusy = false
+    // 已翻译句子的淡琥珀背景高亮(约13%透明度,深浅主题皆可读)
+    private val transHighlightColor = Color.parseColor("#22FFA000")
 
     companion object {
         private val SUMMARY_THREADS = 6          // 空闲时:大核全用
@@ -518,6 +518,8 @@ class MainActivity : AppCompatActivity() {
         windowRefEmb = null
         windowPrevEmb = null
         rollingLowHits = 0
+        rollingLowStreak = 0
+        pendingForceEndpoint = false
         checkSerial++
         activeLabelForWindow = null
         lastConfirmedLabel = null
@@ -527,15 +529,6 @@ class MainActivity : AppCompatActivity() {
             sessionTranscript?.close()
             sessionTranscript = SessionTranscript.begin(filesDir)
         }
-        // 预热翻译引擎:把模型文件读进 OS 页缓存后即释放(每批仍按防污染
-        // 协议重建),消除开头几批的冷加载失败
-        translateHandler.post {
-            val e = ensureTranslateEngine()
-            if (e != null) {
-                translateEngine = null
-                runCatching { e.release() }
-            }
-        }
         recordingThread = thread(true) {
             processSamples()
         }
@@ -545,7 +538,6 @@ class MainActivity : AppCompatActivity() {
     /** 暂停:麦克风停,会话不死——录音线程退出时软 endpoint 定格在途句,
      *  精修/声纹判定回来照常修正字幕,标签命名可用。 */
     private fun pauseSession() {
-        closeTransSeg()
         isRecording = false
         pauseStartedAt = SystemClock.elapsedRealtime()
         runCatching { audioRecord?.stop() }   // 不 release,继续时复用
@@ -573,7 +565,6 @@ class MainActivity : AppCompatActivity() {
 
     /** 停止:整场会议结束(转写保留,可继续生成纪要)。 */
     private fun stopSession() {
-        closeTransSeg()
         if (isRecording) {
             isRecording = false
             runCatching { audioRecord?.stop() }
@@ -672,6 +663,7 @@ class MainActivity : AppCompatActivity() {
                                     windowRefEmb = emb
                                     windowPrevEmb = emb
                                     rollingLowHits = 0
+                                    rollingLowStreak = 0
                                 } else {
                                     val simA = SpeakerRecognition.similarity(emb, anchor)
                                     val simP = if (prev == null) simA else
@@ -682,6 +674,7 @@ class MainActivity : AppCompatActivity() {
                                             " drop=$speakerSwitchDrop hits=$rollingLowHits")
                                     if (simA >= speakerSwitchDrop) {
                                         // 同人缓漂:高置信窗才吸收进锚点(P3 防漂移)
+                                        rollingLowStreak = 0
                                         if (simA >= emaAbsorbMin) {
                                             windowRefEmb = blendEmb(anchor, emb)
                                         }
@@ -690,10 +683,12 @@ class MainActivity : AppCompatActivity() {
                                     } else if (simP >= emaAbsorbMin) {
                                         // 只偏离锚点、紧贴上一窗 → 音量/情绪渐变,
                                         // 更新双参考,不换行
+                                        rollingLowStreak = 0
                                         windowRefEmb = blendEmb(anchor, emb)
                                         windowPrevEmb = emb
                                         rollingLowHits = 0
                                     } else {
+                                        rollingLowStreak += 1
                                         rollingLowHits += 1
                                         if (rollingLowHits >= switchStrikesNeeded) {
                                             rollingLowHits = 0
@@ -706,6 +701,7 @@ class MainActivity : AppCompatActivity() {
                                                         active != null &&
                                                         newLabel == active -> {
                                                     windowRefEmb = blendEmb(anchor, emb)
+                                                    rollingLowStreak = 0
                                                     windowPrevEmb = emb
                                                 }
                                                 // 当前行未归属而窗匹配到已知人 →
@@ -721,6 +717,15 @@ class MainActivity : AppCompatActivity() {
                                                             SystemClock.elapsedRealtime()
                                                     Log.i(TAG, "SWITCH-SUSPECT" +
                                                             " armed fast-endpoint owner=sid$owner")
+                                                    // 无缝插话确证:连续低分够了
+                                                    // → 不等停顿,本窗立即强判
+                                                    if (rollingLowStreak >= forceSwitchStreaks) {
+                                                        pendingForceEndpoint = true
+                                                        rollingLowStreak = 0
+                                                        Log.i(TAG, "SWITCH-FORCE" +
+                                                                " streak>=$forceSwitchStreaks" +
+                                                                " owner=sid$owner")
+                                                    }
                                                 }
                                             }
                                         }
@@ -737,10 +742,12 @@ class MainActivity : AppCompatActivity() {
                 }
 
 
-                // 路线A:疑似换人后的第一个自然停顿(≥0.3s)即触发结算
-                val fastEp = switchSuspicionAtMs != 0L &&
+                // 路线A:疑似换人后的第一个自然停顿(≥0.3s)即触发结算;
+                // 无缝插话确证(连续低分 streak)走 pendingForceEndpoint 直切
+                val fastEp = pendingForceEndpoint ||
+                        (switchSuspicionAtMs != 0L &&
                         SystemClock.elapsedRealtime() - switchSuspicionAtMs < 5_000L &&
-                        silenceRun >= silenceNeedSamples
+                        silenceRun >= silenceNeedSamples)
                 val susExpired = switchSuspicionAtMs != 0L && !fastEp &&
                         SystemClock.elapsedRealtime() - switchSuspicionAtMs >= 5_000L
                 if (susExpired) {
@@ -752,9 +759,13 @@ class MainActivity : AppCompatActivity() {
                     switchSuspicionAtMs = 0L
                 }
                 if (fastEp) {
+                    val forced = pendingForceEndpoint
+                    pendingForceEndpoint = false
+                    rollingLowStreak = 0
                     switchSuspicionAtMs = 0L
                     silenceRun = 0
-                    Log.i(TAG, "FAST-EP fired (suspicion + pause)")
+                    Log.i(TAG, "FAST-EP fired (" +
+                            (if (forced) "force: low-streak)" else "suspicion + pause)"))
                 }
                 val isEndpoint = onlineRecognizer.isEndpoint(stream) || fastEp
 
@@ -862,6 +873,16 @@ class MainActivity : AppCompatActivity() {
                         if (fastEmb != null)
                             SpeakerRecognition.fastRegistry.addAuto(it, fastEmb)
                     }
+            // CAM++ 校准数据回路:打印判定前的原始余弦最高分(含注册表规模)。
+            // 判错人时看 best 落在哪:best≥0.5 且人不对 → speakerThreshold
+            // 对 CAM++ 偏高/偏低要重标;best 模糊区(0.4~0.55)密集 → 换窗长。
+            if (emb != null) {
+                Log.i(TAG, "VERDICT-SCORE sid=$sid" +
+                        " best=" + "%.3f".format(
+                            SpeakerRecognition.registry.bestScore(emb)) +
+                        " thr=$speakerThreshold fallback=$verdictFallbackMin" +
+                        " label=$label dur=${snap.size / sampleRateInHz}s")
+            }
             uiHandler.post { confirmSpeaker(sid, label, emb, fastEmb) }
         }
     }
@@ -917,10 +938,12 @@ class MainActivity : AppCompatActivity() {
         activeSpeakerModel = null
     }
 
-    // E:轻量声纹模型(eres2net base)专供滚动换人检测,推理快 ~4 倍。
+    // E:轻量声纹模型(eres2net base,列表末位)专供滚动换人检测,推理快 ~4 倍。
     // 找不到该文件(或准确模型本来就是 base)时跳过,滚动检测自动回退准确模型。
+    // 注:换 CAM++ 主选后 fast 空间暂仍用 base(独立 registry 镜像,互不污染);
+    // CAM++ 足够小,后续想让它兼职 fast 只需把末位换成同文件。
     private fun initFastSpeakerModel() {
-        val fastName = speakerModels[1]
+        val fastName = speakerModels.last()
         if (activeSpeakerModel == fastName) return   // 准确模型已是 base
         try {
             SpeakerRecognition.initFastExtractor(
@@ -1394,17 +1417,38 @@ class MainActivity : AppCompatActivity() {
                 }
             }, start, start + head.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
         }
+        var prevSubRow = false   // 上一句是否渲染过句下行(译文/翻译中占位)
         for ((i, s) in line.sentences.withIndex()) {
             if (s.text.isBlank()) continue
             if (sb.length > start + head.length) {
                 // 历史逐句分行;直播按语言习惯衔接(分支写开:Char/String 混
-                // 在 if 表达式里会被推断成 Any,没有匹配的 append 重载)
-                if (historyMode) sb.append('\n')
+                // 在 if 表达式里会被推断成 Any,没有匹配的 append 重载)。
+                // 上一句带译文/占位子行时必须换行,否则下一句原文黏在译文尾
+                if (historyMode || prevSubRow) sb.append('\n')
                 else sb.append(joinerAfter(line.sentences[i - 1].text))
             }
+            prevSubRow = false
+            val sFrom = sb.length
             sb.append(if (historyMode) s.text else s.text.lowercase())
-            // 双语字幕:原文下方小字斜体译文(批次二;颜色沿用行色,整行着色)
-            s.trans?.takeIf { it.isNotBlank() }?.let { tr ->
+            // 点击原文句 → 翻译/收起(历史只读视图不挂;不改视觉样式)
+            if (!historyMode && s.finalized) {
+                val qStart = sb.length - s.text.lowercase().length
+                sb.setSpan(object : ClickableSpan() {
+                    override fun onClick(widget: View) {
+                        onSubtitleSentenceTap(s)
+                    }
+
+                    override fun updateDrawState(ds: TextPaint) {
+                        ds.color = color
+                        ds.isUnderlineText = false
+                    }
+                }, qStart, sb.length, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+            }
+            // 译文行:小字斜体挂在句下(点击翻译产物;收起态不渲染)。
+            // 已翻译且译文可见 → 原文+译文整块淡色背景高亮(收起即消失;
+            // 失败/在途不标)
+            var hlTo = -1
+            s.trans?.takeIf { it.isNotBlank() && s.transVisible }?.let { tr ->
                 sb.append('\n')
                 val ts = sb.length
                 sb.append(tr)
@@ -1412,6 +1456,22 @@ class MainActivity : AppCompatActivity() {
                         Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
                 sb.setSpan(StyleSpan(Typeface.ITALIC), ts, sb.length,
                         Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+                prevSubRow = true
+                hlTo = sb.length
+            }
+            if (hlTo > sFrom) {
+                sb.setSpan(BackgroundColorSpan(transHighlightColor),
+                        sFrom, hlTo, Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+            }
+            if (s.transPending) {
+                sb.append('\n')
+                val ps = sb.length
+                sb.append(getString(R.string.trans_pending))
+                sb.setSpan(RelativeSizeSpan(0.82f), ps, sb.length,
+                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+                sb.setSpan(StyleSpan(Typeface.ITALIC), ps, sb.length,
+                        Spanned.SPAN_EXCLUSIVE_EXCLUSIVE)
+                prevSubRow = true
             }
         }
         sb.setSpan(
@@ -1472,6 +1532,7 @@ class MainActivity : AppCompatActivity() {
         windowRefEmb = null
         windowPrevEmb = null
         rollingLowHits = 0
+        rollingLowStreak = 0   // 新行=新锚点,连续低分从头算
         list.add(line)
         if (!historyMode) {
             subtitleAdapter.notifyItemInserted(subtitleLines.size - 1)
@@ -1531,7 +1592,6 @@ class MainActivity : AppCompatActivity() {
             // 不会再有精修回来:立即收回句子索引
             // (SKIP_SHORT 等情况 submitRefineTask 已写对账日志,不重复记)
             sentenceById.remove(sid)
-            requestTranslate(sid, sentence.text)   // 底稿即最终文本 → 直接翻译
         }
         sentence.line?.let { notifyLine(it) }
         autoScroll()
@@ -1807,6 +1867,7 @@ class MainActivity : AppCompatActivity() {
         if (second != null && second != sentence.text) {
             sentence.text = second
             sentence.refined = true
+            sentence.trans = null      // 原文已变,旧译文作废(再点击重译)
             sentence.line?.let { notifyLine(it) }
             autoScroll()
         } else {
@@ -1816,8 +1877,6 @@ class MainActivity : AppCompatActivity() {
             // 会话记录器挂钩②(终稿文本):与字幕层看到同一最终结果
             sessionTranscript?.onRefined(sid, sentence.text, sentence.refined)
         }
-        // 定稿文本已确定(应用或保底稿)→ 排队翻译(批次二:双语字幕)
-        requestTranslate(sid, sentence.text)
     }
 
     // 滚动窗口查"这是谁":有 fast 模型时查 fast 镜像(0.4 宽松阈值,仅供显示);
@@ -1879,105 +1938,301 @@ class MainActivity : AppCompatActivity() {
         return if (l == "ja" || l == "en") l else "zh"
     }
 
-    private fun requestTranslate(sid: Long, text: String) {
-        if (text.isBlank()) return
-        // ---- 轮次分段(换人/静默6s → 封段送二次翻译)----
-        findSentence(sid)?.line?.let { line ->
-            val now = SystemClock.elapsedRealtime()
-            var seg = openTransSeg
-            if (seg == null || seg.line !== line ||
-                now - seg.lastAddMs > transSegGapMs
-            ) {
-                closeTransSeg()
-                seg = TransSeg(line)
-                openTransSeg = seg
-            }
-            seg.lastAddMs = now
-            findSentence(sid)?.let { st ->
-                if (!seg.sentences.contains(st)) seg.sentences.add(st)
-            }
-            armSegTimer()
+    // ==================== 点击字幕句翻译(2026-09-15 改造)====================
+    // 自动翻译已下线。点击定稿句:首次=带同轮上下文译该句,结果缓存到
+    // Sentence.trans 挂在句下;再点=收起/展开(不重译)。质量治理沿用:
+    // 空/复读/漂移拒收 + 温度递进重试、每句重建引擎(KV 污染 workaround)。
+    private fun onSubtitleSentenceTap(s: Sentence) {
+        if (!s.finalized || s.text.isBlank()) return
+        if (s.transPending) return
+        s.trans?.let {
+            s.transVisible = !s.transVisible
+            s.line?.let { notifyLine(it) }
+            return
         }
-        // ---- 初译(小批量;段末二次翻译会逐句覆盖)----
-        if (translateDisabled) return
-        if (!translatedSids.add(sid)) return            // 每槽初译只排一次
-        if (SummarizePipeline.detectLanguage(text) == uiLanguage()) return
-        initialPending.add(Pair(sid, text))
-        if (initialPending.size >= initialBatchMax) flushInitialBatch() else armInitialBatchTimer()
-    }
-
-    // ==================== 轮次分段与二次翻译(2026-09-14)====================
-    // 段 = 同一字幕行(同一说话人轮次)内连续定稿的句子。封段时机:
-    // ①不同行/不同说话人的句子定稿;②段内 6s 无新定稿(静默);
-    // ③暂停/停止。封段后整段带编号送二次翻译,按编号逐句覆盖初译;
-    // 单句段不重翻(初译已是全上下文)。
-    private class TransSeg(val line: SubtitleLine) {
-        val sentences = ArrayList<Sentence>()
-        var lastAddMs = 0L
-    }
-    private val transSegGapMs = 6_000L
-    private var openTransSeg: TransSeg? = null
-    private var transSegTimer: Runnable? = null
-
-    private fun armSegTimer() {
-        transSegTimer?.let { uiHandler.removeCallbacks(it) }
-        val r = Runnable {
-            val seg = openTransSeg ?: return@Runnable
-            if (SystemClock.elapsedRealtime() - seg.lastAddMs > transSegGapMs) {
-                closeTransSeg()
-            }
+        if (transBusy) {
+            Toast.makeText(this, getString(R.string.trans_busy),
+                Toast.LENGTH_SHORT).show()
+            return
         }
-        transSegTimer = r
-        uiHandler.postDelayed(r, transSegGapMs + 500)
-    }
-
-    private fun closeTransSeg() {
-        val seg = openTransSeg ?: return
-        openTransSeg = null
-        transSegTimer?.let { uiHandler.removeCallbacks(it) }
-        transSegTimer = null
-        flushInitialBatch()
-        val all = seg.sentences.filter { it.text.isNotBlank() }
-        if (translateDisabled) return
-        // 单句段:初译成功就不用重翻;失败/缺失则兜底补这一句
-        val refs = if (all.size < 2)
-            all.filter { it.trans.isNullOrBlank() } else all
-        if (refs.isEmpty()) return
-        if (SummarizePipeline.detectLanguage(refs.joinToString("")) ==
-            uiLanguage()
-        ) return
+        if (SummarizePipeline.detectLanguage(s.text) == uiLanguage()) {
+            Toast.makeText(this, getString(R.string.trans_already),
+                Toast.LENGTH_SHORT).show()
+            return
+        }
+        if (!sourceLangOk(s.text)) {
+            Toast.makeText(this, getString(R.string.trans_not_3lang),
+                Toast.LENGTH_SHORT).show()
+            return
+        }
+        val gguf = File(File(externalModelDir, translateModelDirName),
+            translateGgufName)
+        if (!gguf.isFile) {
+            Toast.makeText(this, getString(R.string.trans_no_model,
+                "adb push $translateGgufName ${gguf.parent}/"),
+                Toast.LENGTH_LONG).show()
+            return
+        }
+        // 同轮上下文:本行中该句之前的句子(最近 ≤600 字),仅帮助模型消解
+        // 指代/省略,不进入译文
+        val ctx = StringBuilder()
+        for (prev in s.line?.sentences.orEmpty()) {
+            if (prev === s) break
+            if (prev.text.isNotBlank()) ctx.append(prev.text.trim()).append(' ')
+        }
+        var context = ctx.toString().trim()
+        if (context.length > 600) context = context.takeLast(600)
+        s.transPending = true
+        s.line?.let { notifyLine(it) }
+        transBusy = true
+        val srcText = s.text
+        val srcId = s.id
         translateHandler.post {
-            val map = translateNumbered(refs.map {
-                Pair(it.id.toString(), it.text)
-            })
-            if (map == null || !plausibleTranslations(map.values)) {
-                Log.i(TAG, "SEG-TRANSLATE rejected/failed, keep drafts")
-                return@post
-            }
+            // 让核:翻译线程永远低于录音/ASR 线程优先级(工程惯例同定稿线程)
+            Process.setThreadPriority(Process.THREAD_PRIORITY_BACKGROUND)
+            translateHandler.removeCallbacks(unloadRunnable)
+            val tr = translateOne(srcId, srcText, context)
+            transBusy = false
             uiHandler.post {
-                val touched = HashSet<SubtitleLine>()
-                refs.forEach { s2 ->
-                    val tr = map[s2.id.toString()]
-                    when {
-                        tr == null || tr.isBlank() ->
-                            Log.i(TAG, "MISS sid=" + s2.id + " reason=seg-empty")
-                        isEcho(s2.text, tr, echoJaccardTh(s2.text)) ->
-                            Log.i(TAG, "MISS sid=" + s2.id + " reason=seg-echo")
-                        !targetLangOk(tr) ->
-                            Log.i(TAG, "MISS sid=" + s2.id + " reason=seg-drift" +
-                                    " sample=" + tr.take(24).replace("\n", " "))
-                        else -> if (s2.trans != tr) {
-                            s2.trans = tr
-                            s2.line?.let { touched.add(it) }
-                        }
-                    }
+                s.transPending = false
+                if (tr != null && s.text == srcText) {
+                    s.trans = tr
+                    s.transVisible = true
+                } else if (tr == null && s.text == srcText) {
+                    Toast.makeText(this, getString(R.string.trans_failed),
+                        Toast.LENGTH_SHORT).show()
                 }
-                touched.forEach { notifyLine(it) }
-                Log.i(TAG, "SEG-TRANSLATE applied " + refs.size + " sentences")
+                s.line?.let { notifyLine(it) }
+            }
+            translateHandler.postDelayed(unloadRunnable, translateIdleUnloadMs)
+        }
+    }
+
+    // 翻译输入侧"只认中日英"闸门(点击才触发,确定性字符判定,不问模型):
+    // ①西里尔/阿拉伯/希伯来/泰文/谚文/片假名区外日韩文等三语外文字 → 拒;
+    // ②带重音拉丁(à-ż)≥2 视为法/西/葡等欧洲语言(正常英文句极少连用,
+    // café+naïve 两句才误伤,可接受);③必须含三语正文字符。
+    private fun sourceLangOk(x: String): Boolean {
+        var foreign = 0
+        var diacritic = 0
+        var native_ = 0
+        for (c in x) {
+            val cp = c.code
+            if (cp in 0x400..0x4FF || cp in 0x600..0x6FF || cp in 0x590..0x5FF ||
+                    cp in 0xE00..0xE7F || cp in 0x3130..0x318F ||
+                    cp in 0xAC00..0xD7AF || cp in 0x1100..0x11FF
+            ) foreign++
+            if (cp in 0x00C0..0x024F) diacritic++
+            if (cp in 0x3040..0x30FF || cp in 0x3400..0x4DBF ||
+                    cp in 0x41..0x5A || cp in 0x61..0x7A ||
+                    cp in 0x4E00..0x9FFF || cp in 0xFF66..0xFF9F ||
+                    cp in 0xF900..0xFAFF
+            ) native_++
+        }
+        return foreign == 0 && diacritic < 2 && native_ > 0
+    }
+
+    // 原文自身复读探测(ASR 草稿复读时,译文忠实复现不该被退化闸门误杀):
+    // 任一 4-gram 非重叠出现 ≥3 次即判复读("数据显示，数据显示,数据显示"
+    // 尾部缺标点,整单元精确折叠匹配不到,故用 gram 计数)。
+    private fun srcHasRepetition(x: String): Boolean {
+        if (x.length < 12) return false
+        val lastPos = HashMap<String, Int>()
+        val cnt = HashMap<String, Int>()
+        for (i in 0..x.length - 4) {
+            val g = x.substring(i, i + 4)
+            if (g.isBlank()) continue
+            val lp = lastPos[g]
+            if (lp == null || i - lp >= 4) {
+                val n = (cnt[g] ?: 0) + 1
+                cnt[g] = n
+                lastPos[g] = i
+                if (n >= 3) return true
+            }
+        }
+        return false
+    }
+
+    // 1B 主链:genfail/echo 温度递进重试(0→0.3→0.7,末次丢上下文);
+    // langdrift 一次即弃 → return null 交给升档兜底(1B 的漂移是能力问题,
+    // 换温度没用);与上次被拒样本逐字相同 = 确定性掉沟,立即止损。
+    // 译文清洗(2026-09-15):1B 聊天模型爱把"翻訳："这类答案标签混进译文。
+    // ①标签独占行("翻訳：\n正文")→ 丢标签行取正文;②同行前缀
+    // ("翻訳：正文"/"**翻訳**：正文"/引号包裹)→ 反复剥前缀;全空返 null
+    // (走重试,绝不把标签写上屏)。
+    private val transLabelLine = Regex(
+        "^\\s*(以下是?)?\\s*(翻訳|翻译|訳文|译文|translation|translate)" +
+                "(结果|結果)?\\s*(如下)?\\s*[：:—\\-|.。・]*\\s*$",
+        RegexOption.IGNORE_CASE)
+    private val transLabelPrefix = Regex(
+        "^\\s*(\\*\\*|__|#+\\s*)?\\s*[「\"“'『]?\\s*(以下是?)?\\s*(翻訳|翻译|訳文|译文|" +
+                "translation|translate)\\s*(结果|結果)?\\s*(如下)?\\s*(\\*\\*|__)?\\s*" +
+                "(は|的|为|:)?\\s*[：:—\\-]\\s*[」\"”'』]?\\s*", RegexOption.IGNORE_CASE)
+
+    private fun cleanTrans(raw: String?): String? {
+        if (raw.isNullOrBlank()) return null
+        val ls = raw.trim().lines().toMutableList()
+        while (ls.isNotEmpty() && transLabelLine.matches(ls.first().trim()))
+            ls.removeAt(0)
+        var s = ls.joinToString("\n").trim()
+        var prev: String
+        do {
+            prev = s
+            s = transLabelPrefix.replaceFirst(s, "").trim()
+        } while (s != prev && s.isNotEmpty())
+        if (s.length >= 2 && ((s.startsWith("「") && s.endsWith("」")) ||
+                        (s.startsWith("\"") && s.endsWith("\"")) ||
+                        (s.startsWith("“") && s.endsWith("”")))
+        ) s = s.substring(1, s.length - 1).trim()
+        return s.ifBlank { null }
+    }
+
+    // 点击翻译总入口:1B 主链失败 → 升档兜底(摘要引擎,多语言能力强得多)。
+    // 歌词体/文言中文("最贪富贵的潦倒一生…")超 1B 边界,温度重试无用,
+    // 唯一解是换更大的模型再试一次。
+    private fun translateOne(sid: Long, src: String, context: String): String? {
+        // 时间预算:录音中 45s、空闲 95s。超预算宁可失败(toast 可重试),
+        // 也不让重试链长时间抢 ASR 的核(饥饿会引发第一遍字幕复读)。
+        val deadline = SystemClock.elapsedRealtime() +
+                if (isRecording) 45_000L else 95_000L
+        translateOne1B(sid, src, context, deadline)?.let { return it }
+        return translateFallback(sid, src, context, deadline)
+    }
+
+    private fun translateOne1B(
+        sid: Long, src: String, context: String, deadline: Long,
+    ): String? {
+        var temp = 0f
+        var genRetry = 0
+        var ctx = context
+        var lastRej = ""
+        while (true) {
+            if (SystemClock.elapsedRealtime() > deadline) {
+                Log.i(TAG, "TAP-MISS sid=$sid reason=budget src=" + src.take(20))
+                return null
+            }
+            val map = translateNumbered(
+                listOf(Pair(sid.toString(), src)), temp, ctx)
+            val raw = map?.get(sid.toString())?.trim()
+            val srcTag = " src=" + SummarizePipeline.detectLanguage(src) +
+                    ":" + src.take(20).replace("\n", " ")
+            // 译文内部复读治理(2026-09-15):1B 批译长句会把某个译文段复制
+            // 多份(拼回后"大量重复某一句")。先折叠;折叠即腰斩 → 判退化。
+            // 但先对照原文:ASR 自己复读的句子("数据显示,数据显示,数据显示"),
+            // 译文忠实复现不算退化 → 原文也有同等复读时放行原文不折叠。
+            val tr = when {
+                raw == null -> null
+                else -> {
+                    val c = collapseRepetitions(raw)
+                    if (c.length * 2 >= raw.length || raw.length < 16) c
+                    else if (srcHasRepetition(src) &&
+                            raw.length <= src.length * 4 + 16
+                    ) {
+                        Log.i(TAG, "TAP-FAITHFUL sid=$sid src-self-repeat")
+                        raw
+                    } else null
+                }
+            }
+            when {
+                tr.isNullOrBlank() -> {
+                    Log.i(TAG, "TAP-MISS sid=$sid reason=" +
+                            (if (raw != null) "repeat" else "genfail") +
+                            " temp=$temp" + srcTag)
+                    if (genRetry >= 2) return null
+                    genRetry++; temp = if (temp == 0f) 0.3f else 0.7f
+                    if (genRetry >= 2) ctx = ""
+                }
+                isEcho(src, tr, echoJaccardTh(src)) -> {
+                    val es = tr.replace("\n", " ")
+                    Log.i(TAG, "TAP-MISS sid=$sid reason=echo temp=$temp" + srcTag)
+                    if (es == lastRej) return null   // 复读成惯性,换温度无用
+                    lastRej = es
+                    if (genRetry >= 2) return null
+                    genRetry++; temp = if (temp == 0f) 0.3f else 0.7f
+                    if (genRetry >= 2) ctx = ""
+                }
+                !targetLangOk(tr) -> {
+                    val sample = tr.replace("\n", " ")
+                    Log.i(TAG, "TAP-MISS sid=$sid reason=langdrift temp=$temp" +
+                            " sample=" + sample.take(24) + srcTag)
+                    if (sample == lastRej) return null
+                    lastRej = sample
+                    // 漂移一次即弃治疗直接升档:1B 对中文口语/文学体的
+                    // zh→ja 是系统性弱项(繁体+脑补续写),温度递进只是
+                    // 在同一口浅井里打水,不如省 20s 交给兜底引擎
+                    return null
+                }
+                else -> return tr
             }
         }
     }
 
+    // 升档兜底:1B 全链失败后,用摘要引擎(E2B/MiniCPM5,已随纪要常驻外部
+    // 目录)低温再译一次。临时引擎用完即 release(KV 污染协议);预算将尽
+    // (剩不到 8s)不启用。产物过同样的 echo/drift 质检,宁缺毋滥。
+    private fun translateFallback(
+        sid: Long, src: String, context: String, deadline: Long,
+    ): String? {
+        if (SystemClock.elapsedRealtime() > deadline - 8_000) {
+            Log.i(TAG, "TAP-FALLBACK sid=$sid skipped=budget")
+            return null
+        }
+        val gguf = File(File(externalModelDir, summarizeModelDirName),
+            summarizeGgufName)
+        if (!gguf.isFile) {
+            Log.i(TAG, "TAP-FALLBACK sid=$sid skipped=no-model " +
+                    gguf.absolutePath)
+            return null
+        }
+        var e: LlmEngine? = null
+        return try {
+            e = LlmEngine(gguf.absolutePath, SUMMARY_CTX,
+                if (isRecording) SUMMARY_THREADS_BUSY else SUMMARY_THREADS,
+                chatTemplate = summarizeChatTemplate)
+            val out = e.generate(
+                systemPrompt = "你是专业翻译。把给出的句子翻译成" + transTargetName() +
+                        "。只输出译文本身,不要解释、不要引号、不要抄写原文," +
+                        "不要以「翻訳：」等任何标签开头," +
+                        "禁止道歉或说明无法完成,翻不了就输出空字符串。" +
+                        "文学性表达按原文风格意译,保留重复与排比。" +
+                        transLangHint() + "。",
+                userPrompt = transCtxBlock(context) + src,
+                maxNewTokens = (src.length * 2 + 96).coerceAtMost(1200),
+                temperature = 0.2f, repeatPenalty = 1.1f,
+            )
+            val tr = cleanTrans(out)
+            when {
+                tr.isNullOrBlank() || isEcho(src, tr, echoJaccardTh(src)) ||
+                        !targetLangOk(tr) -> {
+                    Log.i(TAG, "TAP-FALLBACK sid=$sid rejected src=" + src.take(20))
+                    null
+                }
+                else -> {
+                    Log.i(TAG, "TAP-FALLBACK sid=$sid applied")
+                    tr
+                }
+            }
+        } catch (t: Throwable) {
+            Log.w(TAG, "TAP-FALLBACK sid=$sid error: ${t.message}")
+            null
+        } finally {
+            e?.let { runCatching { it.release() } }
+        }
+    }
+
+    // 翻译目标语名/提示语/上下文块(1B 与兜底两路共用)
+    private fun transTargetName(): String = when (uiLanguage()) {
+        "ja" -> "日本語"; "en" -> "English"; else -> "简体中文"
+    }
+    private fun transLangHint(): String = when (uiLanguage()) {
+        "ja" -> "译文必须是日语(须含假名,不要输出中文或繁体)"
+        "zh" -> "译文必须是简体中文(不得用繁体字,不要输出日语或英语)"
+        else -> "The translation must be English only (no CJK characters)"
+    }
+    private fun transCtxBlock(context: String): String =
+        if (context.isBlank()) "" else
+            "【参考上下文(不要翻译)】\n" + context + "\n\n【需要翻译的句子】\n"
+
     // 容错提取 "编号":"译文" 对:顺序扫描,不要求 JSON 完整闭合——
     // 生成被 maxNewTokens 截断时,已完成的条目仍能救出
     private fun extractNumberedPairs(out: String?): Map<String, String>? {
@@ -2015,11 +2270,14 @@ class MainActivity : AppCompatActivity() {
     private fun ensureTranslateEngine(): LlmEngine? {
         val f = File(File(externalModelDir, translateModelDirName), translateGgufName)
         if (!f.isFile) {
-            Log.i(TAG, "translate model missing at ${f.absolutePath}; bilingual off")
+            Log.i(TAG, "translate model missing at ${f.absolutePath}; tap-translate off")
             return null
         }
         return try {
-            LlmEngine(f.absolutePath, 4096, 2, chatTemplate = "gemma3")
+            // 录音中降载:1 线程给第一遍/第二遍 ASR 让核(实测:满线程重建风暴
+            // 会让 nemotron 饥饿→字幕复读某一小句);空闲时才用 2 线程
+            LlmEngine(f.absolutePath, 4096, if (isRecording) 1 else 2,
+                chatTemplate = "gemma3")
                 .also { translateEngine = it }
         } catch (t: Throwable) {
             Log.w(TAG, "translate engine init failed: ${t.message}")
@@ -2027,95 +2285,20 @@ class MainActivity : AppCompatActivity() {
         }
     }
 
-    private fun armInitialBatchTimer() {
-        initialBatchTimer?.let { uiHandler.removeCallbacks(it) }
-        val r = Runnable { flushInitialBatch() }
-        initialBatchTimer = r
-        uiHandler.postDelayed(r, initialBatchDelayMs)
-    }
-
-    private fun flushInitialBatch() {
-        initialBatchTimer?.let { uiHandler.removeCallbacks(it) }
-        initialBatchTimer = null
-        if (initialPending.isEmpty() || translateDisabled) return
-        val batch = ArrayList(initialPending)
-        initialPending.clear()
-        translateHandler.post { runTranslateBatch(batch, 0f) }
-    }
-
-    // 翻译线程执行:直出/编号批 → 逐条质检(空/复读/语言漂移)→ 主线程应用。
-    // 生成失败或语言漂移 → 温度递进重试(每句最多 2 次,translateAttempts 仅在本线程读写)。
-    private fun runTranslateBatch(batch: List<Pair<Long, String>>, temp: Float) {
-        val map = translateNumbered(
-            batch.map { Pair(it.first.toString(), it.second) }, temp
-        )
-        if (map == null || !plausibleTranslations(map.values)) {
-            val retry = ArrayList<Pair<Long, String>>()
-            for ((sid, src) in batch) {
-                val att = bumpAttempt(sid)
-                Log.i(TAG, "MISS sid=" + sid + " reason=genfail attempt=" + att)
-                if (att <= 2) retry.add(Pair(sid, src))
-            }
-            if (retry.isNotEmpty()) {
-                translateHandler.post {
-                    runTranslateBatch(retry, if (temp < 0.5f) 0.3f else 0.7f)
-                }
-            }
-            return
-        }
-        val good = HashMap<Long, String>()
-        val drift = ArrayList<Pair<Long, String>>()
-        for ((sid, src) in batch) {
-            val tr = map[sid.toString()]
-            when {
-                tr == null || tr.isBlank() ->
-                    Log.i(TAG, "MISS sid=" + sid + " reason=empty")
-                isEcho(src, tr, echoJaccardTh(src)) ->
-                    Log.i(TAG, "MISS sid=" + sid + " reason=echo")
-                !targetLangOk(tr) -> {
-                    val att = bumpAttempt(sid)
-                    Log.i(TAG, "MISS sid=" + sid + " reason=langdrift attempt=" +
-                            att + " sample=" + tr.take(24).replace("\n", " "))
-                    if (att <= 1) drift.add(Pair(sid, src))
-                }
-                else -> good[sid] = tr
-            }
-        }
-        uiHandler.post {
-            val touched = HashSet<SubtitleLine>()
-            good.forEach { (sid, tr) ->
-                findSentence(sid)?.let { s2 ->
-                    if (s2.trans != tr) {
-                        s2.trans = tr
-                        s2.line?.let { touched.add(it) }
-                    }
-                }
-            }
-            touched.forEach { notifyLine(it) }
-        }
-        if (drift.isNotEmpty()) translateHandler.post {
-            runTranslateBatch(drift, 0.3f)
-        }
-    }
-
     // 一批 = 一个全新引擎(nativeGenerate 不清 KV 的 workaround)。
-    // items: key(通常是 sid 字符串) × 原文;返回 key × 译文,失败 null。
+    // items: key(通常是 sid 字符串) × 原文;context: 可选的同轮参考上下文
+    // (只帮助消解指代,不进译文);返回 key × 译文,失败 null。
     private fun translateNumbered(
         items: List<Pair<String, String>>, temp: Float = 0f,
+        context: String = "",
     ): Map<String, String>? {
         if (items.isEmpty()) return emptyMap()
-        val targetName = when (uiLanguage()) {
-            "ja" -> "日本語"; "en" -> "English"; else -> "简体中文"
-        }
-        val langHint = when (uiLanguage()) {
-            "ja" -> "译文必须是日语(须含假名,不要输出中文或繁体)"
-            "zh" -> "译文必须是简体中文(不得用繁体字,不要输出日语或英语)"
-            else -> "The translation must be English only (no CJK characters)"
-        }
+        val targetName = transTargetName()
+        val langHint = transLangHint()
+        val ctxBlock = transCtxBlock(context)
         translateEngine?.let { runCatching { it.release() } }
         translateEngine = null
-        val engine = ensureTranslateEngine()
-            ?: run { translateDisabled = true; return null }
+        val engine = ensureTranslateEngine() ?: return null
         // 长句拆段:小模型对短输入才稳定;长句译到中途会"掉语言"
         // (简体→繁体→别的语言)。拆 ≤140 字段一次 generate,段序拼回。
         val segKeys = ArrayList<Pair<String, String>>()
@@ -2135,16 +2318,19 @@ class MainActivity : AppCompatActivity() {
             val one = try {
                 engine.generate(
                     systemPrompt = "你是专业翻译。把给出的句子翻译成" + targetName +
-                            "。只输出译文本身,不要解释、不要引号、不要抄写原文。" +
+                            "。只输出译文本身,不要解释、不要引号、不要抄写原文," +
+                            "不要以「翻訳：」等任何标签开头," +
+                            "禁止道歉或说明无法完成,翻不了就输出空字符串。" +
                             "你只在中文、日本語、English 三种语言之间翻译;" +
                             "输入不属于这三种语言时输出空字符串。" + langHint + "。",
-                    userPrompt = segKeys[0].second,
+                    userPrompt = ctxBlock + segKeys[0].second,
                     maxNewTokens = budget, temperature = temp,
+                    repeatPenalty = 1.1f,
                 )
             } catch (t: Throwable) {
                 Log.w(TAG, "TRANSLATE single failed: " + t.message); null
             }
-            val tr = one?.trim()?.lines()?.firstOrNull { it.isNotBlank() }?.trim()
+            val tr = cleanTrans(one)
             if (!tr.isNullOrEmpty()) got[segKeys[0].first] = tr
             if (got.isEmpty()) return null
         } else {
@@ -2158,18 +2344,21 @@ class MainActivity : AppCompatActivity() {
                             "只输出JSON对象,键是编号字符串,值是译文," +
                             "例如 {\"1\":\"…\",\"2\":\"…\"}。不得增删编号。" +
                             "严禁把原文照抄为译文;无法翻译的段值输出空字符串。" +
-                            "你只在中文、日本語、English 三种语言之间翻译。" +
+                            "你只在中文、日本語、English 三种语言之间翻译;" +
+                            "段不属于这三种语言时其值输出空字符串。" +
                             langHint + "。",
-                    userPrompt = "【文本】\n" + numbered,
+                    userPrompt = ctxBlock + "【文本】\n" + numbered,
                     maxNewTokens = budget, temperature = temp,
+                    repeatPenalty = 1.1f,
                 )
             } catch (t: Throwable) {
                 Log.w(TAG, "TRANSLATE batch failed: " + t.message); null
             }
             val byIdx = extractNumberedPairs(out)
             segKeys.forEachIndexed { i, st ->
-                byIdx?.get((i + 1).toString())?.takeIf { it.isNotBlank() }
-                    ?.let { got[st.first] = it }
+                byIdx?.get((i + 1).toString())?.let { cleanTrans(it) }
+                ?.takeIf { it.isNotBlank() }
+                ?.let { got[st.first] = it }
             }
             // 模型对编号批会"犯懒跳号"(只写最后一段等)→ 缺失段逐一直出
             // 兜底;每段重建引擎(nativeGenerate 不清 KV,复用必复读)
@@ -2184,8 +2373,11 @@ class MainActivity : AppCompatActivity() {
                     val one = try {
                         e2.generate(
                             systemPrompt = "你是专业翻译。把给出的文本翻译成" +
-                                    targetName + "。只输出译文本身,不要解释。" +
-                                    "你只在中文、日本語、English 三种语言之间翻译。" +
+                                    targetName + "。只输出译文本身,不要解释," +
+                                    "不要以「翻訳：」等任何标签开头," +
+                                    "禁止道歉或说明无法完成,翻不了就输出空字符串。" +
+                                    "你只在中文、日本語、English 三种语言之间翻译;" +
+                                    "输入不属于这三种语言时输出空字符串。" +
                                     langHint + "。",
                             userPrompt = st.second,
                             maxNewTokens = (st.second.length * 2 + 96)
@@ -2193,9 +2385,7 @@ class MainActivity : AppCompatActivity() {
                             temperature = 0f,
                         )
                     } catch (t: Throwable) { null }
-                    one?.trim()?.lines()?.firstOrNull { it.isNotBlank() }
-                        ?.trim()?.takeIf { it.isNotEmpty() }
-                        ?.let { got[st.first] = it }
+                    cleanTrans(one)?.let { got[st.first] = it }
                 }
             }
             if (got.isEmpty()) return null
@@ -2205,6 +2395,18 @@ class MainActivity : AppCompatActivity() {
             val n = segCount[key]
             if (n == null) got[key]?.let { res[key] = it }
             else {
+                // 跨段复读:拆段后各段译文本应互不相同;≥2 段同文(且非短句)
+                // = 模型把一段复制成多段 → 该 key 整条判退化(不装配),让
+                // translateOne 的重试机制重建
+                val segVals = (0 until n).mapNotNull { got[key + "#s" + it] }
+                if (segVals.size == n && n >= 2 &&
+                        segVals.distinct().size < n &&
+                        segVals.first().length >= 16
+                ) {
+                    Log.i(TAG, "TRANSLATE key=$key cross-seg repeat " +
+                            n + "→" + segVals.distinct().size)
+                    continue
+                }
                 val sb = StringBuilder()
                 var full = true
                 for (i in 0 until n) {
@@ -2219,12 +2421,6 @@ class MainActivity : AppCompatActivity() {
         return if (res.isEmpty()) null else res
     }
 
-    // 复读/退化检测:一半以上译文雷同 → 判退化,保留旧译文
-    private fun plausibleTranslations(vals: Collection<String>): Boolean {
-        val v = vals.filter { it.isNotBlank() }
-        return v.size < 2 || v.distinct().size * 2 >= v.size
-    }
-
     // 复读检测:译文与原文归一化后全等/长串包含/字符二元组 Jaccard≥0.72
     // → 判为"把原文抄进译文",该条丢弃(维持原状),不写入字幕
     private fun normalizeForEcho(x: String): String =
@@ -2266,7 +2462,11 @@ class MainActivity : AppCompatActivity() {
 
     // 目标语健全检查(治"译着译着变繁体/变第三种语言"):
     // ja 必须含足量假名;zh 不得有假名且繁体专用字 ≤1;en 不得含 CJK。
+    // 带重音拉丁(à-ż 区段,如 população)→ 西/葡等语种漂移信号:中日目标
+    // ≥2 个即拒;en 目标允许 ≤2(café/São Paulo 类专名),再多判漂移。
     private val tradOnlyChars = "們這來說對學體豐華讓裡國變顯點單據觀"
+    private fun diacriticLatin(x: String): Int =
+        x.count { it.code in 0x00C0..0x024F }
     private fun targetLangOk(tr: String): Boolean {
         // 三语以外文字零容忍(漂移成俄语/韩语/阿语/泰语等时任何目标语都不该放行)
         tr.forEach { c ->
@@ -2276,6 +2476,8 @@ class MainActivity : AppCompatActivity() {
                     cp in 0xAC00..0xD7AF || cp in 0x1100..0x11FF
             ) return false
         }
+        if (diacriticLatin(tr) >= if (uiLanguage() == "en") 3 else 2)
+            return false
         if (tr.length < 12) return true
         return when (uiLanguage()) {
             "ja" -> {
@@ -2313,9 +2515,10 @@ class MainActivity : AppCompatActivity() {
         return union > 0 && inter.toDouble() / union >= th
     }
 
+    // 闲置卸载:最后一次点击翻译 60s 后释放引擎(在途翻译由 transBusy 挡)
     private val unloadRunnable = Runnable {
         val e = translateEngine ?: return@Runnable
-        if (initialPending.isEmpty()) {
+        if (!transBusy) {
             translateEngine = null
             translateHandler.post { runCatching { e.release() } }
         }
diff --git a/app/src/main/res/values-en/strings.xml b/app/src/main/res/values-en/strings.xml
index 4180b40..d77d7e6 100644
--- a/app/src/main/res/values-en/strings.xml
+++ b/app/src/main/res/values-en/strings.xml
@@ -50,6 +50,13 @@
     <string name="sum_generating">Minutes in progress — tap again to cancel</string>
     <string name="sum_no_abi">This device ABI lacks the summarizer runtime (arm64-v8a only)</string>
     <string name="sum_model_missing">Summarizer model missing. Run:\n%1$s</string>
+    <!-- Tap-to-translate -->
+    <string name="trans_pending">Translating…</string>
+    <string name="trans_busy">Please wait for the current translation</string>
+    <string name="trans_already">This sentence is already in your language</string>
+    <string name="trans_failed">Translation failed — tap the sentence again to retry</string>
+    <string name="trans_not_3lang">Only zh/ja/en translation is supported; this sentence is in another language</string>
+    <string name="trans_no_model">Translator model missing. Run:\n%1$s</string>
     <string name="sum_loading">Loading summarizer model (%1$s)…</string>
     <string name="sum_stage_notes">notes</string>
     <string name="sum_stage_draft">drafting</string>
diff --git a/app/src/main/res/values-ja/strings.xml b/app/src/main/res/values-ja/strings.xml
index 50ac339..1f295cc 100644
--- a/app/src/main/res/values-ja/strings.xml
+++ b/app/src/main/res/values-ja/strings.xml
@@ -50,6 +50,13 @@
     <string name="sum_generating">議事録を生成中です。もう一度押すと中止できます</string>
     <string name="sum_no_abi">この端末のABIには要約ランタイムが含まれていません(arm64-v8aのみ)</string>
     <string name="sum_model_missing">要約モデルがありません。実行してください:\n%1$s</string>
+    <!-- タップ翻訳 -->
+    <string name="trans_pending">翻訳中…</string>
+    <string name="trans_busy">現在の翻訳の完了をお待ちください</string>
+    <string name="trans_already">この文は表示言語と同じです</string>
+    <string name="trans_failed">翻訳に失敗しました。もう一度タップしてください</string>
+    <string name="trans_not_3lang">中日英間の翻訳のみ対応。この文は該当言語ではありません</string>
+    <string name="trans_no_model">翻訳モデルがありません。実行してください:\n%1$s</string>
     <string name="sum_loading">要約モデル(%1$s)を読み込み中…</string>
     <string name="sum_stage_notes">メモ更新</string>
     <string name="sum_stage_draft">清書</string>
diff --git a/app/src/main/res/values/strings.xml b/app/src/main/res/values/strings.xml
index 37eab36..c1412c6 100644
--- a/app/src/main/res/values/strings.xml
+++ b/app/src/main/res/values/strings.xml
@@ -51,6 +51,13 @@
     <string name="sum_generating">纪要正在生成中,再点一次可取消</string>
     <string name="sum_no_abi">本机 ABI 未包含摘要运行时库(仅 arm64-v8a 真机可用)</string>
     <string name="sum_model_missing">缺少摘要模型。请执行:\n%1$s</string>
+    <!-- 点击字幕句翻译 -->
+    <string name="trans_pending">翻译中…</string>
+    <string name="trans_busy">请等待当前翻译完成</string>
+    <string name="trans_already">该句已是当前界面语言</string>
+    <string name="trans_failed">翻译失败,可再次点击重试</string>
+    <string name="trans_not_3lang">仅支持中/日/英互译,该句不属于这三种语言</string>
+    <string name="trans_no_model">缺少翻译模型。请执行:\n%1$s</string>
     <string name="sum_loading">正在加载摘要模型(%1$s)…</string>
     <string name="sum_stage_notes">滚动笔记</string>
     <string name="sum_stage_draft">成稿</string>
diff --git a/tools/llama-jni/src/summarize_llm_jni.cpp b/tools/llama-jni/src/summarize_llm_jni.cpp
index 2b062f7..e32a130 100644
--- a/tools/llama-jni/src/summarize_llm_jni.cpp
+++ b/tools/llama-jni/src/summarize_llm_jni.cpp
@@ -154,7 +154,8 @@ Java_com_k2fsa_sherpa_onnx_LlmEngine_nativeSetThreads(
 JNIEXPORT jstring JNICALL
 Java_com_k2fsa_sherpa_onnx_LlmEngine_nativeGenerate(
         JNIEnv * env, jclass /*clazz*/, jlong ptr,
-        jstring jPrompt, jint maxNewTokens, jfloat temperature, jint topK, jfloat topP) {
+        jstring jPrompt, jint maxNewTokens, jfloat temperature, jint topK, jfloat topP,
+        jfloat repeatPenalty) {
 
     auto * e = (Engine *) (uintptr_t) ptr;
     if (e == nullptr || e->ctx == nullptr) {
@@ -214,7 +215,9 @@ Java_com_k2fsa_sherpa_onnx_LlmEngine_nativeGenerate(
 
     // --- decode loop ---
     const llama_token eos = llama_vocab_eos(e->vocab);
-    std::mt19937 rng(42);  // fixed seed => reproducible minutes across runs
+    std::mt19937 rng(42 + (uint32_t) (temperature * 1000.0f));
+    // seed 随温度错位:温度递进的重试不再抽同一条随机序列(此前固定 42,
+    // 0.3 重试与 0.0 贪心几乎同果,"跳出死路"名存实亡)
     std::string out;
     out.reserve(1024);
     std::vector<char> piece(64);
@@ -223,6 +226,12 @@ Java_com_k2fsa_sherpa_onnx_LlmEngine_nativeGenerate(
     const bool greedy = !(temperature > 0.0f);
     const int k = topK > 0 ? topK : 64;          // Gemma 4 recommended: 64
     const float p = topP > 0.0f ? topP : 0.95f;  // recommended: ~0.95
+    // Repeat penalty (llama.cpp style, unique-token window): 1B 模型在垃圾/
+    // 歧义输入上极易进入复读循环。pen<=0 时禁用(摘要路径保持原行为),
+    // 翻译路径传 1.1。只惩罚本步已生成过的 token,窗口=最近 64 个生成 token。
+    const bool usePen = repeatPenalty > 1.0f;
+    std::vector<llama_token> recent;
+    std::vector<bool> penalized;  // scratch for unique marking
 
     for (int i = 0; i < maxNew; ++i) {
         if (e->abort.load()) break;
@@ -234,6 +243,21 @@ Java_com_k2fsa_sherpa_onnx_LlmEngine_nativeGenerate(
         float * logits = llama_get_logits_ith(e->ctx, 0);
         const int vsize = llama_vocab_n_tokens(e->vocab);
 
+        if (usePen && !recent.empty()) {
+            if ((int) recent.size() > 64)
+                recent.erase(recent.begin(), recent.begin() + (recent.size() - 64));
+            if (penalized.size() < (size_t) vsize)
+                penalized.assign((size_t) vsize + 4096, false);
+            for (llama_token t : recent) {
+                if (t >= 0 && t < vsize && !penalized[t]) {
+                    penalized[t] = true;
+                    float & lg = logits[t];
+                    lg = lg < 0 ? lg * repeatPenalty : lg / repeatPenalty;
+                }
+            }
+            for (llama_token t : recent) if (t >= 0 && t < vsize) penalized[t] = false;
+        }
+
         // pick next token
         llama_token next;
         if (greedy) {
@@ -286,6 +310,7 @@ Java_com_k2fsa_sherpa_onnx_LlmEngine_nativeGenerate(
             }
         }
         cur = next;
+        if (usePen) recent.push_back(next);
     }
 
     LOGI("generated %d chars", (int) out.size());