feat: agency portfolio with per-client integrations hub

Admin home lists tenants, alerts, and connection health; header
selector enables superadmin context; Meta/GA4/GSC/GTM/CRM/email
slots live per tenant (manual status until OAuth).

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

src/app/api/admin/create-client/route.ts

@@ -38,6 +38,45 @@ export async function POST(req: NextRequest) {
       return NextResponse.json({ error: error.message || 'Error al provisionar cliente en base de datos.' }, { status: 500 });
     }
 
+    // Seed integration slots (best-effort; ignore if table missing)
+    try {
+      const tenantId =
+        data?.tenant_id || data?.id || data?.client?.tenant_id || null;
+      const serviceKey = process.env.SUPABASE_SERVICE_ROLE_KEY?.trim();
+      const url = process.env.NEXT_PUBLIC_SUPABASE_URL || 'https://supabase.4ventures.es';
+      if (tenantId && serviceKey) {
+        const providers = [
+          ['meta_ads', 'Meta Ads'],
+          ['google_ads', 'Google Ads (MCC)'],
+          ['ga4', 'Google Analytics 4'],
+          ['search_console', 'Search Console'],
+          ['tag_manager', 'Tag Manager'],
+          ['clientify', 'Clientify'],
+          ['klaviyo', 'Klaviyo'],
+          ['mailchimp', 'Mailchimp'],
+        ];
+        await fetch(`${url}/rest/v1/integrations`, {
+          method: 'POST',
+          headers: {
+            apikey: serviceKey,
+            Authorization: `Bearer ${serviceKey}`,
+            'Content-Type': 'application/json',
+            Prefer: 'resolution=ignore-duplicates',
+          },
+          body: JSON.stringify(
+            providers.map(([provider, label]) => ({
+              tenant_id: tenantId,
+              provider,
+              status: 'disconnected',
+              label,
+            }))
+          ),
+        });
+      }
+    } catch (e) {
+      console.warn('seed integrations skipped', e);
+    }
+
     return NextResponse.json({ success: true, client: data });
   } catch (err: any) {
     console.error('Server error creating client:', err);