Fix X-ASR release tail capture

Ariver

2026-06-14 d14fa75079de570cb9c4dbf63f6b5bd65f959b09

 privatevoice.src/internal/engine/engine_darwin.go

@@ -6,6 +6,7 @@
   "fmt"
   "strings"
   "sync"
   "time"
   "voicesnap/internal/logger"
   "voicesnap/internal/model"

@@ -16,6 +17,7 @@
const (
   asrSampleRate          = 16000
   xasrTailPaddingSamples = asrSampleRate + asrSampleRate/2
   xasrReleaseTailDelay   = 300 * time.Millisecond
)

var xasrTailPadding = make([]float32, xasrTailPaddingSamples)
@@ -301,6 +303,10 @@
   return e.hwInfo
}

func (e *xasrStreamingEngine) ReleaseTailCaptureDelay() time.Duration {
   return xasrReleaseTailDelay
}

func (e *sherpaEngine) Close() {
   if e.recognizer != nil {
      sherpa.DeleteOfflineRecognizer(e.recognizer)