Fix Streaming Paraformer by recreating stream after inputFinished

After calling inputFinished(), the stream cannot accept new audio.
Must create a new stream for the next recording session instead of
just calling reset().

- Add recreateStream() method to destroy old stream and create new one
- Call recreateStream() in stopRecordingStreaming() after getting result
- Call recreateStream() in startRecording() to ensure clean state

Co-Authored-By: Claude <noreply@anthropic.com>

Author: ZhaoChaoqun

Sources/RecordingManager.swift

@@ -152,7 +152,8 @@ class RecordingManager {
         case .funasrNano:
             vad?.reset()
         case .streamingParaformer:
-            onlineRecognizer?.reset()
+            // 确保使用新的 stream（防止上次 inputFinished 后状态异常）
+            onlineRecognizer?.recreateStream()
         }
 
         // 创建音频引擎
@@ -416,8 +417,8 @@ class RecordingManager {
             // 获取最终结果
             let text = recognizer.getResult()
 
-            // 重置流状态，清空残留数据
-            recognizer.reset()
+            // 重新创建流（inputFinished 后必须创建新流才能继续使用）
+            recognizer.recreateStream()
 
             DispatchQueue.main.async {
                 var finalText: String? = nil

Sources/SherpaOnnxOnlineRecognizer.swift

@@ -130,6 +130,19 @@ class SherpaOnnxOnlineRecognizer {
         SherpaOnnxOnlineStreamReset(recognizer, stream)
     }
 
+    /// 重新创建流（在 inputFinished 后必须调用此方法才能开始新的识别）
+    func recreateStream() {
+        // 销毁旧的 stream
+        if let oldStream = stream {
+            SherpaOnnxDestroyOnlineStream(oldStream)
+        }
+        // 创建新的 stream
+        stream = SherpaOnnxCreateOnlineStream(recognizer)
+        if stream == nil {
+            print(">>> SherpaOnnxOnlineRecognizer: 重新创建流失败")
+        }
+    }
+
     /// 通知输入结束
     func inputFinished() {
         guard let stream = stream else { return }