feat(ui): conversation account binding for send/receive primary/backup

- Filter account selector by conversation channelType
- Add sortOrder priority input
- Use currentBindConversation ref for binding context

admin-web/src/views/Conversation.vue

@@ -95,7 +95,7 @@
         <el-form-item label="账号">
           <el-select v-model="bindAccountForm.accountId" placeholder="选择账号" style="width: 100%">
             <el-option
-              v-for="a in accounts"
+              v-for="a in filteredBindAccounts"
               :key="a.id"
               :label="a.accountName"
               :value="a.id"
@@ -110,6 +110,9 @@
             <el-option label="接收备用号" :value="4" />
           </el-select>
         </el-form-item>
+        <el-form-item label="优先级">
+          <el-input-number v-model="bindAccountForm.sortOrder" :min="0" style="width: 100%" />
+        </el-form-item>
       </el-form>
       <template #footer>
         <el-button @click="bindAccountVisible = false">取消</el-button>
@@ -214,6 +217,12 @@ function formatAccountName(id: number | undefined) {
   return accountMap.value.get(id) || id
 }
 
+const filteredBindAccounts = computed(() => {
+  const channelType = currentBindConversation.value?.channelType
+  if (!channelType) return accounts.value
+  return accounts.value.filter((a: any) => a.channelType === channelType)
+})
+
 function formatConversationType(type: number | undefined) {
   if (type === 1) return '单聊'
   if (type === 2) return '群聊'
@@ -312,23 +321,25 @@ async function handleDelete(row: any) {
 }
 
 const bindAccountVisible = ref(false)
-const currentConversationId = ref<number | undefined>()
+const currentBindConversation = ref<any>(null)
 const bindAccountForm = reactive({
   accountId: undefined as number | undefined,
   bindingType: 1,
+  sortOrder: 0,
 })
 
 function openBindAccount(row: any) {
-  currentConversationId.value = row.id
+  currentBindConversation.value = row
   bindAccountForm.accountId = undefined
   bindAccountForm.bindingType = 1
+  bindAccountForm.sortOrder = 0
   bindAccountVisible.value = true
 }
 
 async function handleBindAccount() {
-  if (!currentConversationId.value) return
+  if (!bindAccountForm.accountId || !currentBindConversation.value) return
   try {
-    await bindConversationAccount(currentConversationId.value, bindAccountForm)
+    await bindConversationAccount(currentBindConversation.value.id, bindAccountForm)
     ElMessage.success('绑定成功')
     bindAccountVisible.value = false
     await loadConversations()
@@ -337,6 +348,8 @@ async function handleBindAccount() {
   }
 }
 
+const currentConversationId = ref<number | undefined>()
+
 const bindTagsVisible = ref(false)
 const bindTagsForm = reactive({
   tagIds: [] as number[],