feat: show agent/env counts in vendor tenant list

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/vendor/VendorTenantsPage.tsx

@@ -24,6 +24,10 @@ function statusColor(status: string): 'success' | 'error' | 'warning' | 'auto' {
   }
 }
 
+function formatUsage(used: number, limit: number): string {
+  return limit < 0 ? `${used} / ∞` : `${used} / ${limit}`;
+}
+
 const columns: Column<VendorTenantSummary>[] = [
   {
     key: 'name',
@@ -52,6 +56,24 @@ const columns: Column<VendorTenantSummary>[] = [
     header: 'Server',
     render: (_v, row) => <ServerStatusBadge state={row.serverState} />,
   },
+  {
+    key: 'agentCount',
+    header: 'Agents',
+    render: (_v, row) => (
+      <span style={{ fontFamily: 'monospace', fontSize: '0.875rem' }}>
+        {formatUsage(row.agentCount, row.agentLimit)}
+      </span>
+    ),
+  },
+  {
+    key: 'environmentCount',
+    header: 'Envs',
+    render: (_v, row) => (
+      <span style={{ fontFamily: 'monospace', fontSize: '0.875rem' }}>
+        {row.environmentCount}
+      </span>
+    ),
+  },
   {
     key: 'licenseExpiry',
     header: 'License',

ui/src/types/api.ts

@@ -41,6 +41,9 @@ export interface VendorTenantSummary {
   serverState: string;
   licenseExpiry: string | null;
   provisionError: string | null;
+  agentCount: number;
+  environmentCount: number;
+  agentLimit: number;
 }
 
 export interface VendorTenantDetail {