fix(portal): prefix unused totalPending param with underscore

Silence @typescript-eslint/no-unused-vars for totalPending in
PaymentModal — it is accepted as a prop for API compatibility but the
modal computes selectedTotal from selected invoices instead.

Co-Authored-By: Paperclip <noreply@paperclip.ing>

apps/web/package.json

@@ -14,6 +14,7 @@
   "dependencies": {
     "@groombook/types": "workspace:*",
     "@tailwindcss/vite": "^4.2.2",
+    "better-auth": "^1.0.0",
     "lucide-react": "^0.577.0",
     "react": "^19.0.0",
     "react-dom": "^19.0.0",
@@ -36,5 +37,6 @@
     "vite": "^6.0.7",
     "vite-plugin-pwa": "^0.21.1",
     "vitest": "^3.0.4"
-  }
+  },
+  "license": "AGPL-3.0-only"
 }