优化细节表现

src/components/chatui.vue

@@ -95,6 +95,7 @@ async function getFileInfo(code) {
 
 async function downloadFile(code) {
     if (fileInfoCache.value[code].status === 'waittingDownload') {
+        fileInfoCache.value[code].status = `downloading`;
         return new Promise((resolve, reject) => {
             let id = code.substring(0, 8);
             let key = code.substring(8);
@@ -227,7 +228,7 @@ const fileInfoCache = ref({})
 const fileStatus2String = ref({
     waittingDownload: '点击下载',
     downloading: '下载中',
-    finish: '点击获取',
+    finish: '下载完成',
     Unknow: '获取文件信息中',
     error: '出错'
 })

src/views/chat.vue

@@ -283,7 +283,7 @@ function joinGroup_Verify(gID) {
 }
 
 function sendMsg(gID, msg) {
-    if(msg === '' || activeGID.value === null)return 
+    if(msg === '' || msg === null || activeGID.value === null)return 
     let key = gID2key[gID].key
     msg = encryptString(key, msg, setting)
     socket.send(JSON.stringify({ type: 'message',type1:'text', msg, gID }))