diff --git a/.github/workflows/e2e-playwright.yml b/.github/workflows/e2e-playwright.yml
index 4977d819..7e114f4f 100644
--- a/.github/workflows/e2e-playwright.yml
+++ b/.github/workflows/e2e-playwright.yml
@@ -13,6 +13,8 @@ on:
       - 'src/**'
       - 'shared/**'
       - 'tools/compat-testing/**'
+      - 'idaptik-ums/**'
+      - 'vite.config.js'
       - '.github/workflows/e2e-playwright.yml'
   pull_request:
     branches: [main, master]
@@ -20,6 +22,9 @@ on:
       - 'src/**'
       - 'shared/**'
       - 'tools/compat-testing/**'
+      - 'idaptik-ums/**'
+      - 'vite.config.js'
+      - '.github/workflows/e2e-playwright.yml'
   workflow_dispatch:
 
 permissions: read-all
@@ -54,8 +59,8 @@ jobs:
       - name: Install dependencies
         run: deno install --node-modules-dir=auto
 
-      - name: Build ReScript
-        run: deno task res:build || echo "ReScript build attempted"
+      - name: Build ReScript (root)
+        run: deno task res:build
 
       - name: Install Playwright browsers
         run: npx playwright install --with-deps ${{ matrix.project == 'firefox-1080p' && 'firefox' || matrix.project == 'webkit-1080p' && 'webkit' || 'chromium' }}
diff --git a/tools/compat-testing/playwright.config.js b/tools/compat-testing/playwright.config.js
index 05ade3f1..a1106472 100644
--- a/tools/compat-testing/playwright.config.js
+++ b/tools/compat-testing/playwright.config.js
@@ -7,7 +7,7 @@
 import { defineConfig, devices } from '@playwright/test';
 
 export default defineConfig({
-  testDir: './tools/compat-testing/tests',
+  testDir: './tests',
   timeout: 30000,
   retries: 1,
   fullyParallel: true,
@@ -19,7 +19,7 @@ export default defineConfig({
 
   // Shared settings applied to every project unless overridden.
   use: {
-    baseURL: 'http://localhost:8080',
+    baseURL: 'http://localhost:1984',
     trace: 'on-first-retry',
     screenshot: 'only-on-failure',
   },
@@ -74,7 +74,7 @@ export default defineConfig({
 
   webServer: {
     command: 'deno task dev:vite',
-    port: 8080,
+    port: 1984,
     reuseExistingServer: true,
     timeout: 60000,
   },
diff --git a/vite.config.js b/vite.config.js
index b7dadd7f..c4264ab2 100644
--- a/vite.config.js
+++ b/vite.config.js
@@ -89,8 +89,18 @@ export default defineConfig({
     },
   },
   optimizeDeps: {
-    // Include AffineScript dependencies for proper optimization
-    include: ['@src/app/tea/AffineTEA.js', '@src/app/tea/AffineTEARouter.js'],
+    // Vite pre-bundles relative-path .js imports automatically as it walks
+    // the module graph from the entry HTML, so the explicit include is
+    // redundant. The prior '@src/...' bare-specifier shape failed to resolve
+    // (no '@src' alias is configured; only 'affinescript' and '@tea' are).
+    include: [],
+    // Scope entry discovery to the root index.html only. Vite's default
+    // crawls every .html in the project, which pulled in idaptik-ums/index.html
+    // — a separate Tauri webview entry that imports its own (independently
+    // built) src/App.res.mjs. Playwright tests only exercise the root '/' path,
+    // so scanning idaptik-ums is wasted work and was previously crashing the
+    // dev-server boot under the Playwright webServer 60s timeout.
+    entries: ['index.html'],
   },
   define: {
     APP_VERSION: JSON.stringify(process.env.npm_package_version),