fix(shell): fixed chinese input error 1

tools/shell/src/shellCommand.c

@@ -102,11 +102,9 @@ void shellInsertChar(SShellCmd *cmd, char *c, int32_t size) {
   /* update the values */
   cmd->commandSize += size;
   cmd->cursorOffset += size;
-  for (int i = 0; i < size; i++) {
-    taosMbToWchar(&wc, c + i, size);
-    cmd->screenOffset += taosWcharWidth(wc);
-    cmd->endOffset += taosWcharWidth(wc);
-  }
+  cmd->screenOffset += taosWcharWidth(wc);
+  cmd->endOffset += taosWcharWidth(wc);
+
   // set string end
   cmd->command[cmd->commandSize] = 0;
 #ifdef WINDOWS