[bugfix] can not read the last sentence

lib/services/chat_sse_service.dart

@@ -62,6 +62,7 @@ class ChatSseService {
           if (line.startsWith('data:')) {
             final jsonStr = line.substring(5).trim();
             if (jsonStr == '[DONE]' || jsonStr.contains('message_end')) {
+              TtsUtil.complete();
               onStreamResponse(messageId, responseText, true);
               break;
             }
@@ -89,8 +90,8 @@ class ChatSseService {
                     await _startTtsFuture;
                     _isFirstData = false;
                   }
-                  print("----------------------Send text: " + completeText);
                   completeText += isChinese ? '，' : ',';
+                  print("----------------------Send text: " + completeText);
                   TtsUtil.send(completeText);
                 }
                 tempText = tempText.substring(endIndex).trim();
@@ -108,6 +109,7 @@ class ChatSseService {
     } catch (e) {
       // todo
     } finally {
+      print("------------------------------finally");
       resetRequest();
     }
   }
@@ -123,7 +125,7 @@ class ChatSseService {
 
   Future<void> abort() async {
     _isAborted = true;
-    TtsUtil.stopTts();
+    TtsUtil.stop();
     resetRequest();
   }
 
@@ -136,6 +138,7 @@ class ChatSseService {
     _currentResponse = null;
     _isFirstData = true;
     _isTtsStarted = false;
+    _startTtsFuture = null;
   }
 
   int _getCompleteTextEndIndex(String buffer) {