feat: metrics dashboard with WoW/MoM/YoY and creatives pipeline

Rebuild KPIs as a real dashboard (period deltas, tenant zoom), clarify
objetivos/calendario/activos sources, and turn creatives into a status
pipeline with delete.

Co-authored-by: Cursor <cursoragent@cursor.com>

src/lib/tenant-context.ts

@@ -0,0 +1,70 @@
+import { cookies } from 'next/headers';
+import {
+  VIEW_TENANT_COOKIE,
+  VIEW_TENANT_NAME_COOKIE,
+  homeTenantId,
+  isAgencyRole,
+  serviceHeaders,
+  supabaseUrl,
+  userRole,
+} from '@/lib/agency';
+
+export type ResolvedTenant = {
+  tenantId: string | null;
+  /** true = agency zoomed into one client */
+  viaView: boolean;
+  /** true = agency with no client selected → all tenants */
+  portfolioWide: boolean;
+  label: string;
+};
+
+export async function resolveActiveTenant(user: {
+  app_metadata?: Record<string, unknown>;
+  user_metadata?: Record<string, unknown>;
+} | null): Promise<ResolvedTenant> {
+  const role = userRole(user);
+  const cookieStore = await cookies();
+  const viewId = cookieStore.get(VIEW_TENANT_COOKIE)?.value || null;
+  const viewName = cookieStore.get(VIEW_TENANT_NAME_COOKIE)?.value || null;
+
+  if (isAgencyRole(role) && viewId) {
+    return {
+      tenantId: viewId,
+      viaView: true,
+      portfolioWide: false,
+      label: viewName || 'Cliente',
+    };
+  }
+  if (isAgencyRole(role) && !viewId) {
+    return {
+      tenantId: null,
+      viaView: false,
+      portfolioWide: true,
+      label: 'Portafolio (todos los clientes)',
+    };
+  }
+  return {
+    tenantId: homeTenantId(user),
+    viaView: false,
+    portfolioWide: false,
+    label:
+      (user?.user_metadata?.company as string) ||
+      (user?.app_metadata?.company as string) ||
+      'Cliente',
+  };
+}
+
+export async function restGet<T = unknown>(
+  path: string
+): Promise<{ ok: boolean; data: T | null; error?: string }> {
+  const headers = serviceHeaders();
+  if (!headers) return { ok: false, data: null, error: 'no service role' };
+  const r = await fetch(`${supabaseUrl()}${path}`, {
+    headers,
+    cache: 'no-store',
+  });
+  if (!r.ok) {
+    return { ok: false, data: null, error: await r.text() };
+  }
+  return { ok: true, data: (await r.json()) as T };
+}