翻译预算分配修复+genfail诊断:录音中1B重试预算降到1次(两次尝试~30s),给兜底留出时间窗——现场15s×3吃满45s预算致TAP-FALLBACK skipped=budget;TRANSLATE single/batch empty 诊断日志(原始输出头48字,区分模型白卷与输出被清洗成空)

app/src/main/java/com/k2fsa/sherpa/onnx/MainActivity.kt

@@ -2251,6 +2251,9 @@ class MainActivity : AppCompatActivity() {
     ): String? {
         var temp = 0f
         var genRetry = 0
+        // 重试预算:录音中只允许 1 次(两次尝试≈30s),给兜底留出时间窗——
+        // 现场:三次尝试 15s×3 吃满 45s 预算,兜底被 skipped=budget 拒之门外
+        val maxGenRetry = if (isRecording) 1 else 2
         var ctx = context
         var lastRej = ""
         while (true) {
@@ -2285,7 +2288,7 @@ class MainActivity : AppCompatActivity() {
                     Log.i(TAG, "TAP-MISS sid=$sid reason=" +
                             (if (raw != null) "repeat" else "genfail") +
                             " temp=$temp" + srcTag)
-                    if (genRetry >= 2) return null
+                    if (genRetry >= maxGenRetry) return null
                     genRetry++; temp = if (temp == 0f) 0.3f else 0.7f
                     if (genRetry >= 2) ctx = ""
                 }
@@ -2294,7 +2297,7 @@ class MainActivity : AppCompatActivity() {
                     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
+                    if (genRetry >= maxGenRetry) return null
                     genRetry++; temp = if (temp == 0f) 0.3f else 0.7f
                     if (genRetry >= 2) ctx = ""
                 }
@@ -2488,7 +2491,13 @@ class MainActivity : AppCompatActivity() {
             }
             val tr = cleanTrans(one, segKeys[0].second)
             if (!tr.isNullOrEmpty()) got[segKeys[0].first] = tr
-            if (got.isEmpty()) return null
+            if (got.isEmpty()) {
+                // 空手而归的诊断(2026-09-16):区分「模型白卷」与「输出被清洗成空
+                // (只有标签/残片)」——genfail 现场的两种死法原来看不出
+                Log.w(TAG, "TRANSLATE single empty raw=" +
+                        (one?.take(48)?.replace("\n", " ") ?: "<null>"))
+                return null
+            }
         } else {
             val numbered = segKeys.mapIndexed { i, st ->
                 (i + 1).toString() + ". " + st.second
@@ -2544,7 +2553,11 @@ class MainActivity : AppCompatActivity() {
                     cleanTrans(one, st.second)?.let { got[st.first] = it }
                 }
             }
-            if (got.isEmpty()) return null
+            if (got.isEmpty()) {
+                Log.w(TAG, "TRANSLATE batch empty out=" +
+                        (out?.take(48)?.replace("\n", " ") ?: "<null>"))
+                return null
+            }
         }
         val res = HashMap<String, String>()
         for ((key, _) in items) {