feat: 添加txt文件格式标志

Signed-off-by: tangshizhe <48740614+tangshizhe@users.noreply.github.com>

jypoints-pc/src/components/DocsExchange.vue

@@ -86,7 +86,8 @@ export default {
         1: 'word',
         2: 'pdf',
         3: 'excel',
-        4: 'ppt'
+        4: 'ppt',
+        5: 'txt'
       }
     }
   },
@@ -186,6 +187,10 @@ $vip_color: #B1700E;
     background: url("~@/assets/image/ppt@2x.png") no-repeat center center;
     background-size: contain;
   }
+  .m-txt{
+    background: url("~@/assets/image/txt.png") no-repeat center center;
+    background-size: contain;
+  }
 }
 
 .confirm-button {