fix(send-routing): address re-review issues

- Set conversationScene=EXTERNAL in SendEndToEndTest and align account to WECHAT_PERSONAL
- Replace literal account type code with AccountType.WECHAT_PERSONAL.getCode()
- Use replaceFirst for webhook URL placeholder in WeComBotSender
- Remove unused selectDefaultAccount overload
- Hide scene selector for single-chat conversations in admin-web

admin-web/src/views/Conversation.vue

@@ -30,7 +30,7 @@
       <el-table-column prop="channelType" label="渠道" />
       <el-table-column prop="conversationScene" label="场景" width="100">
         <template #default="{ row }">
-          {{ formatConversationScene(row.conversationScene) }}
+          {{ formatConversationScene(row.conversationScene, row.conversationType) }}
         </template>
       </el-table-column>
       <el-table-column prop="channelConversationId" label="渠道会话ID" show-overflow-tooltip />
@@ -76,7 +76,7 @@
         <el-form-item label="渠道">
           <el-input v-model="dialogForm.channelType" placeholder="wecom" />
         </el-form-item>
-        <el-form-item label="场景">
+        <el-form-item v-if="dialogForm.conversationType === 2" label="场景">
           <el-select v-model="dialogForm.conversationScene" placeholder="选择场景" style="width: 100%">
             <el-option label="内部群" :value="1" />
             <el-option label="外部群" :value="2" />
@@ -125,7 +125,7 @@
         <el-form-item label="渠道">
           <el-input v-model="dialogForm.channelType" placeholder="wecom" />
         </el-form-item>
-        <el-form-item label="场景">
+        <el-form-item v-if="dialogForm.conversationType === 2" label="场景">
           <el-select v-model="dialogForm.conversationScene" placeholder="选择场景" style="width: 100%">
             <el-option label="内部群" :value="1" />
             <el-option label="外部群" :value="2" />
@@ -326,6 +326,12 @@ watch([searchQuery, typeFilter], () => {
   currentPage.value = 1
 })
 
+watch(() => dialogForm.conversationType, (val) => {
+  if (val === 1) {
+    dialogForm.conversationScene = undefined
+  }
+})
+
 function resetDialogForm() {
   dialogForm.conversationType = 2
   dialogForm.channelType = 'wecom'
@@ -401,7 +407,8 @@ function formatConversationType(type: number | undefined) {
   return type ?? '-'
 }
 
-function formatConversationScene(scene: number | undefined) {
+function formatConversationScene(scene: number | undefined, type?: number) {
+  if (type === 1) return '-'
   if (scene === 1) return '内部群'
   if (scene === 2) return '外部群'
   return scene ?? '-'

backend/mci-channel-wecom/src/main/java/com/sino/mci/channel/wecom/WeComBotSender.java

@@ -91,7 +91,7 @@ public class WeComBotSender {
         String customUrl = getString(extra, "webhook_url");
         if (customUrl != null && !customUrl.isBlank()) {
             if (customUrl.contains("%s")) {
-                return customUrl.replace("%s", key);
+                return customUrl.replaceFirst("%s", key);
             }
             return customUrl;
         }

backend/mci-server/src/main/java/com/sino/mci/send/service/SendService.java

@@ -742,10 +742,6 @@ public class SendService {
         return CollectionUtils.isEmpty(accounts) ? null : accounts.get(0);
     }
 
-    private Long selectDefaultAccount(String tenantCode, ChannelType channelType) {
-        return selectDefaultAccount(tenantCode, channelType, null);
-    }
-
     private Long selectDefaultAccount(String tenantCode, ChannelType channelType, Set<Integer> accountTypes) {
         List<ChannelAccount> accounts = accountMapper.selectList(
                 new LambdaQueryWrapper<ChannelAccount>()

backend/mci-server/src/test/java/com/sino/mci/send/service/SendEndToEndTest.java

@@ -52,10 +52,11 @@ class SendEndToEndTest {
                 .andReturn().getResponse().getContentAsString();
         Long subjectId = ((Number) com.jayway.jsonpath.JsonPath.read(subjectResponse, "$.data.id")).longValue();
 
-        // 2. 创建渠道账号
+        // 2. 创建外部群发送账号（pywechat 个人号）
+        String accountCode = "wxid-e2e-" + UUID.randomUUID().toString().substring(0, 8);
         String accountPayload = String.format(
-                "{\"accountType\":1,\"channelType\":\"wecom\",\"subjectId\":%d,\"accountId\":\"ZhangSan\",\"accountName\":\"张三\"}",
-                subjectId);
+                "{\"accountType\":3,\"channelType\":\"wechat_personal\",\"subjectId\":%d,\"accountId\":\"%s\",\"accountName\":\"张三\"}",
+                subjectId, accountCode);
         String accountResponse = mockMvc.perform(post("/msg-platform/api/v1/channel-account")
                         .contextPath("/msg-platform")
                         .header("Authorization", authToken)
@@ -67,10 +68,20 @@ class SendEndToEndTest {
                 .andReturn().getResponse().getContentAsString();
         Long accountId = ((Number) com.jayway.jsonpath.JsonPath.read(accountResponse, "$.data.id")).longValue();
 
-        // 3. 创建会话
+        // 个人号需要心跳才能被路由视为可用
+        mockMvc.perform(post("/msg-platform/api/v1/channel-account/heartbeat")
+                        .contextPath("/msg-platform")
+                        .header("Authorization", authToken)
+                        .header("X-Tenant-Code", tenantCode)
+                        .contentType(MediaType.APPLICATION_JSON)
+                        .content(String.format("{\"accountId\":\"%s\",\"riskLevel\":1}", accountCode)))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.code").value(0));
+
+        // 3. 创建外部群会话
         String channelConversationId = "room-" + UUID.randomUUID().toString().substring(0, 8);
         String conversationPayload = String.format(
-                "{\"conversationType\":2,\"channelType\":\"wecom\",\"channelConversationId\":\"%s\",\"conversationName\":\"E2E群\",\"subjectId\":%d}",
+                "{\"conversationType\":2,\"channelType\":\"wechat_personal\",\"conversationScene\":2,\"channelConversationId\":\"%s\",\"conversationName\":\"E2E群\",\"subjectId\":%d}",
                 channelConversationId, subjectId);
         String conversationResponse = mockMvc.perform(post("/msg-platform/api/v1/conversation")
                         .contextPath("/msg-platform")
@@ -121,7 +132,7 @@ class SendEndToEndTest {
                 .andExpect(jsonPath("$.data.length()").value(1))
                 .andExpect(jsonPath("$.data[0].taskId").value(taskId))
                 .andExpect(jsonPath("$.data[0].sendStatus").value(2))
-                .andExpect(jsonPath("$.data[0].channelType").value("wecom"))
+                .andExpect(jsonPath("$.data[0].channelType").value("wechat_personal"))
                 .andExpect(jsonPath("$.data[0].conversationId").value(conversationId))
                 .andExpect(jsonPath("$.data[0].accountId").value(accountId))
                 .andExpect(jsonPath("$.data[0].contentType").value("text"))

backend/mci-server/src/test/java/com/sino/mci/send/service/SendServiceFailoverTest.java

@@ -115,9 +115,9 @@ class SendServiceFailoverTest {
         verify(adapter, times(2)).sendMessage(requestCaptor.capture());
         List<SendMessageRequest> requests = requestCaptor.getAllValues();
         assertEquals("wxid-primary", requests.get(0).getExtra().get("account_id"));
-        assertEquals(Integer.valueOf(3), requests.get(0).getExtra().get("account_type"));
+        assertEquals(Integer.valueOf(AccountType.WECHAT_PERSONAL.getCode()), requests.get(0).getExtra().get("account_type"));
         assertEquals("wxid-backup", requests.get(1).getExtra().get("account_id"));
-        assertEquals(Integer.valueOf(3), requests.get(1).getExtra().get("account_type"));
+        assertEquals(Integer.valueOf(AccountType.WECHAT_PERSONAL.getCode()), requests.get(1).getExtra().get("account_type"));
 
         ArgumentCaptor<ChannelAccount> accountCaptor = ArgumentCaptor.forClass(ChannelAccount.class);
         verify(accountMapper, times(1)).updateById(accountCaptor.capture());