feat: add admin account detail management

frontend/src/types/admin.ts

@@ -98,6 +98,28 @@ export interface AdminAccountListResponse {
   per_page: number
 }
 
+export interface AdminAccountInviteSummary {
+  id: string
+  email: string
+  role: string
+  expires_at: string | null
+  created_at: string
+  used_at: string | null
+}
+
+export interface AdminAccountDetailResponse extends AdminAccountListItem {
+  invites: AdminAccountInviteSummary[]
+}
+
+export interface AdminAccountCreate {
+  name: string
+  plan: 'free' | 'pro' | 'team'
+}
+
+export interface AdminAccountUpdate {
+  name: string
+}
+
 export interface AuditLogEntry {
   id: string
   user_id: string