feat(tenant): 推送配置说明与IM多端互踢配置

推送服务配置页新增字段说明提示（通道业务键含义、Channel ID 规则、
厂商凭据来源）；IM 服务配置页新增"多端登录与互踢"卡片，支持三种
模式选择；app.ts 类型增加 multiDeviceLoginMode 字段。

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

tenant-platform/src/api/app.ts

@@ -39,6 +39,7 @@ export interface ImServiceConfig {
   historyRetentionDays: number
   conversationPullLimit: number
   multiClientConversationDeleteSync: boolean
+  multiDeviceLoginMode?: 'MULTI_DEVICE_FREE' | 'SAME_PLATFORM_ONE' | 'SINGLE_DEVICE'
 }
 
 export interface UpdateServiceConfig {

tenant-platform/src/views/im/ImConfigView.vue

@@ -108,6 +108,36 @@
       </div>
     </el-card>
 
+    <el-card style="margin-bottom:16px">
+      <template #header>多端登录与互踢</template>
+      <div class="service-config-list">
+        <div class="service-config-row service-config-row--column">
+          <div>
+            <div class="service-config-title">多端登录方式</div>
+            <div class="service-config-desc">控制同一账号在多个设备上的登录行为。</div>
+          </div>
+          <el-radio-group
+            :model-value="imConfig.multiDeviceLoginMode"
+            class="login-mode-group"
+            @change="(val: ImServiceConfig['multiDeviceLoginMode']) => onToggleImConfig({ multiDeviceLoginMode: val })"
+          >
+            <el-radio value="MULTI_DEVICE_FREE">
+              全平台随意登录，不互踢
+              <div class="radio-desc">多台设备可同时在线，不限数量</div>
+            </el-radio>
+            <el-radio value="SAME_PLATFORM_ONE">
+              相同平台踢旧设备
+              <div class="radio-desc">同一平台（Android/iOS/鸿蒙）只保留最新登录设备，不同平台可同时在线</div>
+            </el-radio>
+            <el-radio value="SINGLE_DEVICE">
+              全平台只保留一台设备
+              <div class="radio-desc">任意设备登录后，其他所有设备均被踢下线</div>
+            </el-radio>
+          </el-radio-group>
+        </div>
+      </div>
+    </el-card>
+
     <el-card>
       <template #header>好友与关系链</template>
       <div class="service-config-list">
@@ -169,6 +199,7 @@ const imConfig = computed<ImServiceConfig>(() => {
       historyRetentionDays: parsed.historyRetentionDays ?? 7,
       conversationPullLimit: parsed.conversationPullLimit ?? 100,
       multiClientConversationDeleteSync: parsed.multiClientConversationDeleteSync ?? false,
+      multiDeviceLoginMode: normalizeLoginMode(parsed.multiDeviceLoginMode),
     }
   } catch {
     return defaultImConfig()
@@ -186,9 +217,20 @@ function defaultImConfig(): ImServiceConfig {
     historyRetentionDays: 7,
     conversationPullLimit: 100,
     multiClientConversationDeleteSync: false,
+    multiDeviceLoginMode: 'MULTI_DEVICE_FREE',
   }
 }
 
+function normalizeLoginMode(
+  mode: ImServiceConfig['multiDeviceLoginMode'] | string | undefined,
+): ImServiceConfig['multiDeviceLoginMode'] {
+  const normalized = (mode ?? '').toString().trim().toUpperCase()
+  if (normalized === 'SAME_PLATFORM_ONE' || normalized === 'SINGLE_DEVICE' || normalized === 'MULTI_DEVICE_FREE') {
+    return normalized as ImServiceConfig['multiDeviceLoginMode']
+  }
+  return 'MULTI_DEVICE_FREE'
+}
+
 function normalizeFriendRequestMode(
   mode: ImServiceConfig['friendRequestMode'] | string | undefined,
   allowFriendRequest: boolean | undefined,
@@ -252,6 +294,11 @@ onMounted(loadData)
 .service-name { font-size: 15px; }
 .service-config-list { display: flex; flex-direction: column; gap: 12px; }
 .service-config-row { display: flex; justify-content: space-between; align-items: center; gap: 12px; font-size: 13px; color: #666; }
+.service-config-row--column { flex-direction: column; align-items: flex-start; }
 .service-config-title { font-size: 13px; font-weight: 500; color: #303133; line-height: 1.4; }
 .service-config-desc { margin-top: 4px; font-size: 12px; color: #909399; line-height: 1.4; }
+.login-mode-group { display: flex; flex-direction: column; gap: 12px; margin-top: 12px; }
+.login-mode-group :deep(.el-radio) { height: auto; align-items: flex-start; margin-right: 0; }
+.login-mode-group :deep(.el-radio__label) { white-space: normal; font-size: 13px; font-weight: 500; color: #303133; }
+.radio-desc { font-size: 12px; color: #909399; font-weight: 400; line-height: 1.5; margin-top: 2px; }
 </style>

tenant-platform/src/views/push/PushConfigView.vue

@@ -34,6 +34,13 @@
     <el-card>
       <template #header>厂商配置</template>
       <el-divider content-position="left">通知通道</el-divider>
+      <el-alert
+        description="通知通道定义 Android 通知渠道，以及 iOS/鸿蒙 对应的分类配置。业务键（Key）为业务层自定义的唯一标识，代码内部用于引用此通道，例如 im_message；Channel ID 需与 App manifest 中声明的 NotificationChannel ID 完全一致；版本号在渠道参数变更时自增，客户端将以新版本号重新注册渠道。"
+        type="info"
+        :closable="false"
+        :show-icon="false"
+        style="margin-bottom:12px"
+      />
       <el-table :data="pushConfig.channels" border style="margin-bottom:16px">
         <el-table-column label="业务键" min-width="130">
           <template #default="{ row }">
@@ -80,6 +87,13 @@
       <el-button style="margin-bottom:20px" @click="addChannel">新增通道</el-button>
 
       <el-divider content-position="left">业务分类路由</el-divider>
+      <el-alert
+        description="业务分类路由将系统内置的推送类型（如 IM 消息、好友请求、系统通知）映射到对应通道和优先级，决定推送到达时的展示行为。"
+        type="info"
+        :closable="false"
+        :show-icon="false"
+        style="margin-bottom:12px"
+      />
       <el-table :data="routeRows" border style="margin-bottom:20px">
         <el-table-column label="业务分类" width="160">
           <template #default="{ row }">{{ row.type }}</template>