feat: BUG修复

src/views/Search/external.vue

@@ -19,7 +19,7 @@
           <el-form-item label="验证码：">
             <div class="y-center">
               <el-input
-                  v-model="search.captcha"
+                  v-model="captcha"
                   placeholder="请输入验证码"
                   class="w160"
               ></el-input>