欢迎语支持多段配置与图片

租户可配置有序文本/图片欢迎语；设置页支持增删排序与上传，Widget 空会话按序展示；兼容旧 welcome_message 字段。

web/src/services/api.ts

@@ -354,12 +354,21 @@ export const deleteStaff = (id: number) => del(`/staff/${id}`)
 export type WorkHours = Record<string, string>
 export type AssignStrategy = 'least_load' | 'round_robin'
 
+/** 欢迎语段落：文本或图片 URL */
+export type WelcomeSegment = {
+  type: 'text' | 'image'
+  content: string
+}
+
 export interface TenantSettings {
   tenant_id: number
   display_name: string
   agent_nickname: string
   timezone: string
+  /** 兼容字段：首段文本欢迎语 */
   welcome_message: string
+  /** 多段欢迎语（含图片） */
+  welcome_messages?: WelcomeSegment[]
   offline_prompt: string
   work_hours: WorkHours
   worktime_prompt: string
@@ -372,8 +381,9 @@ export interface TenantSettings {
   max_active_per_agent?: number
 }
 export const getTenantSettings = () => get<TenantSettings>('/settings')
-export const updateTenantSettings = (data: Partial<TenantSettings> & { work_hours?: WorkHours }) =>
-  put<TenantSettings>('/settings', data)
+export const updateTenantSettings = (
+  data: Partial<TenantSettings> & { work_hours?: WorkHours; welcome_messages?: WelcomeSegment[] },
+) => put<TenantSettings>('/settings', data)
 
 // Statistics
 export const getKPIs = () => get<StatisticsKpis>('/statistics/kpi')