refact: 修改请求断言提取长度限制

frontend/src/business/components/api/test/components/assertion/ApiAssertionJsonPath.vue

@@ -2,11 +2,11 @@
   <div>
     <el-row :gutter="10" type="flex" justify="space-between" align="middle">
       <el-col>
-        <el-input :disabled="isReadOnly" v-model="jsonPath.expression" maxlength="255" size="small" show-word-limit
+        <el-input :disabled="isReadOnly" v-model="jsonPath.expression" maxlength="200" size="small" show-word-limit
                   :placeholder="$t('api_test.request.extract.json_path_expression')"/>
       </el-col>
       <el-col>
-        <el-input :disabled="isReadOnly" v-model="jsonPath.expect" maxlength="255" size="small" show-word-limit
+        <el-input :disabled="isReadOnly" v-model="jsonPath.expect" maxlength="2000" size="small" show-word-limit
                   :placeholder="$t('api_test.request.assertions.expect')"/>
       </el-col>
       <el-col class="assertion-btn">

frontend/src/business/components/api/test/components/assertion/ApiAssertionRegex.vue

@@ -10,7 +10,7 @@
         </el-select>
       </el-col>
       <el-col>
-        <el-input :disabled="isReadOnly" v-model="regex.expression" maxlength="255" size="small" show-word-limit
+        <el-input :disabled="isReadOnly" v-model="regex.expression" maxlength="2000" size="small" show-word-limit
                   :placeholder="$t('api_test.request.assertions.expression')"/>
       </el-col>
       <el-col class="assertion-btn">

frontend/src/business/components/api/test/components/extract/ApiExtractCommon.vue

@@ -11,7 +11,7 @@
                                @change="change" show-word-limit :placeholder="$t('api_test.variable_name')"/>
       </el-col>
       <el-col>
-        <el-input :disabled="isReadOnly" v-model="common.expression" maxlength="255" size="small" show-word-limit
+        <el-input :disabled="isReadOnly" v-model="common.expression" maxlength="2000" size="small" show-word-limit
                   :placeholder="expression"/>
       </el-col>
       <el-col class="extract-btn">