refactor(admin-web): polish Chinese UI and bits-ui controls

Map roles to Chinese labels, remove ADR/spec wording from the surface, and replace native selects/checkboxes/modals with bits-ui Select, Checkbox, Switch, Dialog, Label, and Collapsible.

hub/admin-web/src/lib/format.ts

@@ -1,3 +1,10 @@
+import {
+	ORG_ROLE_LABELS,
+	PERMISSION_ROLE_LABELS,
+	type OrgRole,
+	type PermissionRole
+} from './constants';
+
 export function fmtDate(iso: string): string {
 	if (!iso) return '—';
 	const d = new Date(iso);
@@ -26,3 +33,19 @@ export function fmtCost(usd: number | null): string {
 export function fmtNum(n: number): string {
 	return n.toLocaleString();
 }
+
+export function orgRoleLabel(role: string): string {
+	const key = role.toUpperCase() as OrgRole;
+	return ORG_ROLE_LABELS[key] ?? role;
+}
+
+export function permissionRoleLabel(role: string): string {
+	const key = role.toUpperCase() as PermissionRole;
+	return PERMISSION_ROLE_LABELS[key] ?? role;
+}
+
+export function providerModeLabel(mode: string): string {
+	if (mode === 'BYOK') return '自带密钥';
+	if (mode === 'PLATFORM_MANAGED') return '平台托管';
+	return mode;
+}