fix: 1672 库管员配置中未绑定的设备亦可解绑，建议未绑定时隐藏“解绑”按钮

sgzb-ui/src/views/store/tools/keeper.vue

@@ -130,6 +130,7 @@
                   size="mini"
                   type="danger"
                   icon="el-icon-delete"
+                  :disabled="!scope.row.userName"
                   @click="handleDelete(scope.row)"
               >解绑</el-button>
 
@@ -359,7 +360,15 @@ export default {
     handleSelectionChange(selection) {
       this.ids = selection.map(item => item.modelId);
       this.single = selection.length != 1;
-      this.multiple = !selection.length;
+      if (selection.length > 0) {
+        selection.forEach(item => {
+          if (!item.userName) {
+            this.multiple = true
+          }
+        });
+      } else {
+        this.multiple = true
+      }
     },
     /** 新增按钮操作 */
     handleSave() {