feat(frontend): add compact anonymous conversation labels

frontend/app/javascript/dashboard/helper/specs/conversationHelper.spec.js

@@ -1,5 +1,6 @@
 import {
   filterDuplicateSourceMessages,
+  getConversationContactDisplayName,
   getLastMessage,
   getReadMessages,
   getUnreadMessages,
@@ -37,6 +38,36 @@ describe('conversationHelper', () => {
     });
   });
 
+  describe('#getConversationContactDisplayName', () => {
+    it('formats a geolocated anonymous visitor with a base36 session code', () => {
+      expect(
+        getConversationContactDisplayName(
+          {
+            name: '河北邯郸客户',
+            additional_attributes: {
+              visitor_name_source: 'ip_geolocation',
+              visitor_province: '河北',
+              visitor_city: '邯郸',
+            },
+          },
+          1296
+        )
+      ).toBe('河北邯郸·100');
+    });
+
+    it('uses the anonymous label when location is unavailable', () => {
+      expect(
+        getConversationContactDisplayName({ name: '商务通访客' }, 36)
+      ).toBe('匿名10');
+    });
+
+    it('keeps a real contact name unchanged', () => {
+      expect(getConversationContactDisplayName({ name: '张三' }, 1296)).toBe(
+        '张三'
+      );
+    });
+  });
+
   describe('#readMessages', () => {
     it('should return read messages if conversation is passed', () => {
       expect(