enhance: add receiveOfflineMsg configuration and UI toggle for offline message reception

Author: linyuchen

src/common/default_config.json

@@ -34,5 +34,6 @@
   "musicSignUrl": "https://llob.linyuchen.net/sign/music",
   "msgCacheExpire": 120,
   "onlyLocalhost": true,
-  "ffmpeg": ""
+  "ffmpeg": "",
+  "receiveOfflineMsg": false
 }

src/webui/FE/App.vue

@@ -92,6 +92,7 @@ const defaultConfig: Config = {
     token: '',
     port: 3080,
   },
+  receiveOfflineMsg: false
 }
 
 const form = ref(JSON.parse(JSON.stringify(defaultConfig)))

src/webui/FE/components/OtherConfigForm.vue

@@ -46,6 +46,16 @@
       <el-input-number v-model="form.msgCacheExpire" :min="1" :max="86400" />
     </el-form-item>
     <el-row :gutter="16">
+      <el-col :span="12">
+        <el-form-item label="接收离线消息">
+          <el-switch v-model="form.receiveOfflineMsg" />
+          <el-tooltip content="开启后将接收离线消息" placement="top">
+            <el-icon class="info-icon">
+              <QuestionFilled />
+            </el-icon>
+          </el-tooltip>
+        </el-form-item>
+      </el-col>
       <el-col :span="12">
         <el-form-item label="只监听本地地址">
           <el-switch v-model="form.onlyLocalhost" />
@@ -56,6 +66,8 @@
           </el-tooltip>
         </el-form-item>
       </el-col>
+    </el-row>
+    <el-row :gutter="16">
       <el-col :span="12">
         <el-form-item label="webui 密码">
           <el-input v-model="form.webui.token"