test(ui): give the integration vitest tier a wait ceiling matching its cost

Integration cases render a whole component tree and legitimately take about a second per availability round trip under load, so testing-library's 1000ms asyncUtilTimeout default flakes them. The ceiling is raised to 5s for the integration project only via a dedicated setup file; unit and component tiers keep the default

Co-Authored-By: Devin AI <158243242+devin-ai-integration[bot]@users.noreply.github.com>

ui/litellm-dashboard/tests/setup.integration.ts

@@ -0,0 +1,3 @@
+import { configure } from "@testing-library/react";
+
+configure({ asyncUtilTimeout: 5_000 });

ui/litellm-dashboard/vitest.config.ts

@@ -68,6 +68,7 @@ const config: ViteUserConfig = {
         test: {
           ...jsdomTier,
           name: "integration",
+          setupFiles: ["tests/setupTests.ts", "tests/setup.integration.ts"],
           include: ["src/**/*.integration.test.tsx", "tests/**/*.integration.test.tsx"],
           exclude: ["node_modules/**"],
         },