[Feat] Pulse Admin Dashboard - manually grant plans to organizations

- Add admin layout with /api/admin/me check and access denial
- Add admin pages: dashboard, orgs list, org detail with grant form
- Add lib/api/admin.ts client for admin endpoints

Made-with: Cursor

lib/api/admin.ts

@@ -0,0 +1,62 @@
+import { authFetch } from './client'
+
+export interface AdminOrgSummary {
+  organization_id: string
+  stripe_customer_id: string
+  stripe_subscription_id: string
+  plan_id: string
+  billing_interval: string
+  pageview_limit: number
+  subscription_status: string
+  current_period_end: string
+  business_name: string
+  last_payment_at?: string
+  created_at: string
+  updated_at: string
+}
+
+export interface Site {
+  id: string
+  domain: string
+  name: string
+  created_at: string
+}
+
+export interface AdminOrgDetail extends AdminOrgSummary {
+  sites: Site[]
+}
+
+export interface GrantPlanParams {
+  plan_id: string
+  billing_interval: string
+  pageview_limit: number
+  period_end: string // ISO date string
+}
+
+// Check if current user is admin
+export async function getAdminMe(): Promise<{ is_admin: boolean }> {
+  try {
+    return await authFetch<{ is_admin: boolean }>('/api/admin/me')
+  } catch (e) {
+    return { is_admin: false }
+  }
+}
+
+// List all organizations (admin view)
+export async function listAdminOrgs(): Promise<AdminOrgSummary[]> {
+  const data = await authFetch<{ organizations: AdminOrgSummary[] }>('/api/admin/orgs')
+  return data.organizations || []
+}
+
+// Get details for a specific organization
+export async function getAdminOrg(orgId: string): Promise<{ billing: AdminOrgSummary; sites: Site[] }> {
+  return await authFetch<{ billing: AdminOrgSummary; sites: Site[] }>(`/api/admin/orgs/${orgId}`)
+}
+
+// Grant a plan to an organization manually
+export async function grantPlan(orgId: string, params: GrantPlanParams): Promise<void> {
+  await authFetch(`/api/admin/orgs/${orgId}/grant-plan`, {
+    method: 'POST',
+    body: JSON.stringify(params),
+  })
+}