test(e2e): web-app tool open-path suite + pl_editor open/wizard-skip

Add an e2e suite that drives the real React web app (not the standalone
harness): tests/playwright-web.config.ts + tests/web/tools-open.spec.ts navigate
/p/demo/<tool>/<file> for all five tools and assert each boots, opens its demo
file (title drops "untitled"), shows no first-run wizard, and emits no WASM abort
or URL-regex modal. global-setup-web.ts re-seeds the demo project through the API
if missing, so the suite is self-sufficient against a running dev stack. Wired as
`npm run test:web`.

Also at the harness level:
- pl_editor-load.spec.ts: prove the pl_editor kicadOpenFile embind hook opens a
  .kicad_wks (mirrors eeschema-load.spec.ts).
- seed KiCad config in pl_editor.html / symbol_editor.html (matching eeschema.html
  and the web app's boot.ts) so the harness boots wizard-free; repurpose
  pl_editor.spec.ts's stale "wizard completes" test into a wizard-skip regression.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

tests/playwright-web.config.ts

@@ -0,0 +1,64 @@
+import { defineConfig, devices } from '@playwright/test';
+
+/**
+ * E2E config for the React WEB APP (apps/frontend at :3048 + apps/server :3050),
+ * as opposed to playwright-kicad.config.ts which drives the standalone tool
+ * harness HTMLs under tests/apps/kicad.
+ *
+ * These tests exercise the real web open paths: navigate to /p/<project>/<tool>/<file>,
+ * let WasmTool boot the tool in-document (boot.ts), drive the project into MEMFS
+ * and auto-open the file (open-flow.ts via Module.kicadOpenFile), and assert the
+ * editor loaded wizard-free.
+ *
+ * PREREQUISITE: the web stack must be running. From web/:
+ *   pnpm db:up && pnpm db:migrate && pnpm dev
+ * (db:migrate seeds the "demo" project; global-setup-web.ts re-seeds it through
+ * the API if missing.) The webServer block below reuses an already-running stack
+ * and, if absent, best-effort starts `turbo dev` — but that still needs Postgres
+ * up (pnpm db:up) and migrated first.
+ *
+ * Firefox is the reliable headless target on ARM Mac (Chromium SwiftShader WebGL
+ * bug); use --project=chromium (system Chrome) for headed debugging.
+ */
+
+const FRONTEND_URL = process.env.WEB_APP_URL ?? 'http://localhost:3048';
+
+export default defineConfig({
+  globalSetup: './web/global-setup-web.ts',
+  testDir: './web',
+  fullyParallel: false,
+  forbidOnly: !!process.env.CI,
+  retries: process.env.CI ? 1 : 0,
+  // KiCad WASM is process-global (one runtime per page) and each tool wasm is
+  // 40–200 MB; run serially to avoid loading several giant runtimes at once.
+  workers: 1,
+  reporter: 'html',
+  timeout: 180000, // tool wasm download + boot + open can take minutes
+
+  use: {
+    baseURL: FRONTEND_URL,
+    trace: 'retain-on-failure',
+    screenshot: 'only-on-failure',
+  },
+
+  projects: [
+    {
+      name: 'firefox',
+      use: { ...devices['Desktop Firefox'], viewport: { width: 1280, height: 720 } },
+    },
+    {
+      name: 'chromium',
+      use: { channel: 'chrome', viewport: { width: 1280, height: 720 } },
+    },
+  ],
+
+  webServer: {
+    // Best-effort: reuse the dev stack if it's already up (the common case);
+    // otherwise start turbo dev. Postgres (pnpm db:up) + db:migrate must already
+    // have run — turbo dev does not provision the database.
+    command: 'pnpm --dir ../web dev',
+    url: FRONTEND_URL,
+    reuseExistingServer: true,
+    timeout: 120000,
+  },
+});