fix: model parameter stop sequence (#1885)

web/app/components/header/account-setting/model-provider-page/model-parameter-modal/parameter-item.tsx

 
   const handleChange = (v: ParameterValue) => {
     setLocalValue(v)
-    if (!isNullOrUndefined(value) && onChange)
-      onChange(v)
+
+    if (onChange) {
+      if (parameterRule.name === 'stop')
+        onChange(v)
+      else if (!isNullOrUndefined(value))
+        onChange(v)
+    }
   }
 
   const handleNumberInputChange = (e: React.ChangeEvent<HTMLInputElement>) => {