fix: stabilise happy path playwright journeys

playwright.config.js

@@ -1,5 +1,33 @@
 import { defineConfig } from "@playwright/test";
+
+/**
+ * Playwright config for UI mock-mode E2E tests.
+ *
+ * These tests validate layout, state transitions, loading behaviour,
+ * history rendering, and terminal / recovery states.
+ * They do NOT validate reasoning correctness, candidate selection,
+ * decomposition quality, confidence propagation, or question quality.
+ */
+
 export default defineConfig({
-  use: { headless: true, screenshot: "only-on-failure", actionTimeout: 120000 },
-  testMatch: "**/tests/smoke.test.js",
+  testDir: "./tests/e2e",
+  outputDir: "test-results",
+  fullyParallel: false,
+  timeout: 60_000,
+  expect: { timeout: 15_000 },
+  webServer: null,
+  use: {
+    headless: true,
+    screenshot: "only-on-failure",
+    actionTimeout: 30_000,
+    trace: "off",
+    baseURL: "http://localhost:3000",
+  },
+  retries: 0,
+  projects: [
+    {
+      name: "mock-mode",
+      testMatch: /.*\.spec\.js/,
+    },
+  ],
 });