Run e2e tests against a production build

The dev server's unbundled modules made each page load take seconds, which
is most of the time a test spends; E2E_DEV_SERVER=1 keeps the dev server.
Each run writes a JSON report, and CI uses two workers now that the
dropped keep-alive connections behind the flakiness are fixed.

.github/workflows/e2e.yaml

@@ -45,4 +45,4 @@ jobs:
       - run: mkdir -p tests/artifacts
 
       - name: Run e2e tests
-        run: npm run test:e2e -- --project webkit
+        run: npm run test:e2e

CLAUDE.md

@@ -44,8 +44,8 @@ npm run test:unit
 ### E2E tests
 
 ```sh
-npm run test:e2e -- --project webkit
-npm run test:e2e -- tests/e2e/<file>.spec.ts --project webkit
+npm run test:e2e
+npm run test:e2e -- tests/e2e/<file>.spec.ts
 ```
 
 `SKIP_SETUP=true` skips fixture creation for faster iteration.
@@ -93,7 +93,7 @@ These mirror what CI runs on every PR. Run them all before shipping a feature.
 npm run check                            # tsc, svelte-check, eslint, prettier,
                                          # cargo fmt, cargo clippy, cargo test
 npm run test:unit
-npm run test:e2e -- --project webkit
+npm run test:e2e
 ```
 
 If backend types changed, regenerate and commit the bindings first:

eslint.config.js

@@ -161,6 +161,7 @@ export default [
   {
     ignores: [
       "build/*",
+      "tests/tmp/**/*",
       "isolation/*",
       "node_modules/**/*",
       "target/*",

playwright.config.ts

@@ -24,6 +24,12 @@ const userAgent =
 const testHttpApiPort = await getFreePort();
 process.env.VITE_TEST_HTTP_API_PORT = String(testHttpApiPort);
 
+// A separate build directory keeps test settings out of the app bundle.
+const testBuildDir = "tests/tmp/build";
+const appServerCommand = process.env.E2E_DEV_SERVER
+  ? "npm run start -- --strictPort --port 3001"
+  : `npx vite build --outDir ${testBuildDir} --emptyOutDir && npx vite preview --outDir ${testBuildDir} --strictPort --port 3001`;
+
 const config: PlaywrightTestConfig = {
   outputDir: "./tests/artifacts",
   testDir: "./tests/e2e",
@@ -33,10 +39,13 @@ const config: PlaywrightTestConfig = {
     timeout: 8000,
   },
   fullyParallel: true,
-  workers: process.env.CI ? 1 : undefined,
+  workers: process.env.CI ? 2 : undefined,
   forbidOnly: !!process.env.CI,
   retries: process.env.CI ? 2 : 0,
-  reporter: "list",
+  reporter: [
+    ["list"],
+    ["json", { outputFile: "tests/artifacts/results.json" }],
+  ],
   use: {
     colorScheme: "dark",
     actionTimeout: 5000,
@@ -56,7 +65,7 @@ const config: PlaywrightTestConfig = {
 
   webServer: [
     {
-      command: `VITE_AUTH_LONG_DELAY=1000 VITE_TEST_HTTP_API_PORT=${testHttpApiPort} npm run start -- --strictPort --port 3001`,
+      command: `VITE_AUTH_LONG_DELAY=1000 VITE_TEST_HTTP_API_PORT=${testHttpApiPort} ${appServerCommand}`,
       port: 3001,
     },
   ],