refactor: remove ExternalSource and ExternalID from Conversation model and related services, update references to use ChannelID instead

web/app/dashboard/conversation-monitor/_components/detail.tsx

@@ -339,8 +339,8 @@ export function ConversationDetailDialog({
                   value={currentConversation.currentAssigneeName || "-"}
                 />
                 <InfoItem
-                  label="渠道类型"
-                  value={currentConversation.externalSource || "-"}
+                  label="渠道ID"
+                  value={`${currentConversation.channelId || "-"}`}
                 />
                 <InfoItem
                   label="客服未读"

web/app/dashboard/conversation-monitor/page.tsx

@@ -726,7 +726,7 @@ export default function DashboardConversationsPage() {
                         <div className="min-w-0">
                           <div className="font-medium">{item.subject || `会话 #${item.id}`}</div>
                           <div className="mt-1 text-sm text-muted-foreground">
-                            渠道：{item.externalSource || "-"}
+                            渠道ID：{item.channelId || "-"}
                           </div>
                           <div className="mt-1 line-clamp-2 text-sm text-muted-foreground">
                             {item.lastMessageSummary || "暂无最新消息摘要"}

web/app/dashboard/conversations/_components/conversation-info-panel.tsx

@@ -168,10 +168,10 @@ function MissingCustomerEmpty({ conversation }: { conversation: AgentConversatio
         </Button>
       </div>
       <div className="space-y-2">
-        <SectionHeading>访客标识</SectionHeading>
+        <SectionHeading>会话归属</SectionHeading>
         <div className="space-y-2">
-          <DetailRow label="外部来源" value={conversation.externalSource} />
-          <DetailRow label="外部标识" value={conversation.externalId} />
+          <DetailRow label="渠道ID" value={conversation.channelId ? `${conversation.channelId}` : "-"} />
+          <DetailRow label="客户ID" value={conversation.customerId ? `${conversation.customerId}` : "-"} />
         </div>
       </div>
       <CustomerLinkOrCreateDialog

web/app/dashboard/conversations/_components/conversation-list.tsx

@@ -101,12 +101,6 @@ export function ConversationList({ onAfterSelect }: ConversationListProps) {
                     >
                       {getEnumLabel(IMConversationStatusLabels, conversation.status)}
                     </span>
-                    {conversation.externalSource ? (
-                      <>
-                        <span className="opacity-40">·</span>
-                        <span className="truncate">{conversation.externalSource}</span>
-                      </>
-                    ) : null}
                   </div>
                 </div>
               </div>

web/app/dashboard/conversations/page.tsx

@@ -292,9 +292,7 @@ export default function ConversationsPage() {
                   </span>
                 </div>
                 <p className="mt-0.5 truncate text-xs text-muted-foreground sm:text-sm">
-                  <span>{conversation.externalSource}</span>
-                  <span className="text-muted-foreground/60"> / </span>
-                  <span>{conversation.externalId}</span>
+                  <span>渠道 #{conversation.channelId || "-"}</span>
                   {conversation.customerId ? (
                     <>
                       <span className="text-muted-foreground/60"> / </span>