feat(agents, config, dashboard, i18n): add agent line provision wizard, site deletion, and site dashboard with multi-language support

Added agent line provision wizard page with permission gating, replacing redirect placeholder. Introduced site deletion API and UI with confirmation dialog in integration sites management. Added new site-scoped dashboard panel showing bet metrics, P/L trends, active players, and quick links. Enhanced chart tooltip to support custom formatters and fix indicator color

src/lib/admin-session-variants.ts

@@ -0,0 +1,11 @@
+import type { AdminProfile } from "@/types/api/admin-auth";
+
+/** 绑定代理节点的经营账号（非超管）。 */
+export function isAgentOperator(profile: AdminProfile | null | undefined): boolean {
+  return profile?.agent != null && profile.is_super_admin !== true;
+}
+
+/** 平台站点管理员（绑定 site_admin 角色、无代理节点）。 */
+export function isSiteAdminOperator(profile: AdminProfile | null | undefined): boolean {
+  return profile?.site != null && profile.is_super_admin !== true;
+}