实现对话记录页并对齐工作台三栏布局

完善会话列表筛选与摘要字段、归档接口；对话记录按效果图重构；工作台顶栏等高对齐；默认管理员账号改为 kefu_admin / kefu_admin123。

server/cmd/seed/main.go

@@ -19,7 +19,8 @@ func main() {
 }
 
 func seed() {
-	hash, _ := bcrypt.GenerateFromPassword([]byte("password123"), bcrypt.DefaultCost)
+	// 默认后台管理员：kefu_admin / kefu_admin123（其它种子账号同密码）
+	hash, _ := bcrypt.GenerateFromPassword([]byte("kefu_admin123"), bcrypt.DefaultCost)
 	pwd := string(hash)
 
 	// Plans
@@ -48,7 +49,7 @@ func seed() {
 
 	// Tenant 1 users
 	model.DB.Create(&model.User{
-		TenantID: tenants[0].ID, Role: "admin", Username: "admin", PasswordHash: pwd, Nickname: "赵总(管理员)", Status: "online",
+		TenantID: tenants[0].ID, Role: "admin", Username: "kefu_admin", PasswordHash: pwd, Nickname: "赵总(管理员)", Status: "online",
 	})
 	model.DB.Create(&model.User{
 		TenantID: tenants[0].ID, Role: "supervisor", Username: "supervisor", PasswordHash: pwd, Nickname: "客服主管", Status: "online",
@@ -146,6 +147,9 @@ func seed() {
 		{Title: "系统维护通知", Content: "平台将于7月20日 02:00-04:00 进行例行维护", Status: "published"},
 		{Title: "新功能上线", Content: "知识库批量导入功能已上线", Status: "published"},
 	})
+
+	log.Println("默认租户管理员: kefu_admin / kefu_admin123")
+	log.Println("其它种子账号密码均为: kefu_admin123")
 }
 
 func ptr[T any](v T) *T { return &v }