Add KiCad PCBnew WASM test infrastructure

- Add pcbnew-load.spec.ts: Tests for WASM runtime initialization
- Add pcbnew.html: Test harness for loading KiCad in browser
- Add setup-kicad-wasm.sh: Script to copy WASM from Docker build
- Add serve.json: COOP/COEP headers for SharedArrayBuffer support
- Update package.json: Add npm run test:kicad and setup:kicad scripts
- Update .gitignore: Exclude generated WASM/JS files from kicad/

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

tests/e2e/kicad/pcbnew-load.spec.ts

@@ -0,0 +1,96 @@
+import { test, expect } from '../utils/fixtures';
+
+test.describe('KiCad PCBnew WASM', () => {
+
+  test('WASM runtime initializes', async ({ page, testLogger }) => {
+    // Navigate to KiCad app
+    await page.goto('/kicad/pcbnew.html');
+
+    // Wait for runtime initialization (longer timeout for KiCad - 15MB WASM)
+    await page.waitForFunction(() => {
+      return document.querySelector('#canvas')?.style.display === 'block';
+    }, { timeout: 120000 }); // 2 min timeout for large WASM
+
+    // Verify canvas is visible
+    const canvas = page.locator('#canvas');
+    await expect(canvas).toBeVisible();
+
+    // Check for successful initialization logs
+    const initLog = testLogger.consoleLogs.find(l =>
+      l.includes('[KICAD] Runtime initialized')
+    );
+    expect(initLog).toBeTruthy();
+
+    // Check that app started creating
+    const appLog = testLogger.consoleLogs.find(l =>
+      l.includes('[KICAD_OUT] Creating app')
+    );
+    expect(appLog).toBeTruthy();
+
+    // Take screenshot of initial state
+    await page.screenshot({
+      path: 'test-results/kicad-pcbnew-01-initial.png',
+      fullPage: true
+    });
+
+    // Log any errors for debugging (but don't fail on WASM exceptions yet)
+    const errors = testLogger.errors.filter(e =>
+      !e.includes('favicon') &&
+      !e.includes('SharedArrayBuffer')
+    );
+
+    if (errors.length > 0) {
+      console.log('Errors during initialization:', errors);
+    }
+
+    // For now, we expect initialization errors due to incomplete port
+    // The test passes if runtime initializes - we track errors for debugging
+  });
+
+  test('canvas is properly sized', async ({ page }) => {
+    await page.goto('/kicad/pcbnew.html');
+
+    // Wait for load
+    await page.waitForFunction(() => {
+      return document.querySelector('#canvas')?.style.display === 'block';
+    }, { timeout: 120000 });
+
+    // Wait for initial render
+    await page.waitForTimeout(2000);
+
+    // Get canvas and verify it's sized properly
+    const canvas = page.locator('#canvas');
+    const box = await canvas.boundingBox();
+    expect(box).toBeTruthy();
+    expect(box!.width).toBeGreaterThan(100);
+    expect(box!.height).toBeGreaterThan(100);
+
+    // Screenshot for visual inspection
+    await page.screenshot({
+      path: 'test-results/kicad-pcbnew-02-rendered.png',
+      fullPage: true
+    });
+  });
+
+  // This test documents the current state - expect to fail until port is complete
+  test.skip('loads without errors', async ({ page, testLogger }) => {
+    await page.goto('/kicad/pcbnew.html');
+
+    await page.waitForFunction(() => {
+      return document.querySelector('#canvas')?.style.display === 'block';
+    }, { timeout: 120000 });
+
+    await page.waitForTimeout(2000);
+
+    // Check for errors
+    const errors = testLogger.errors.filter(e =>
+      !e.includes('favicon') &&
+      !e.includes('SharedArrayBuffer')
+    );
+
+    // This will fail until KiCad WASM port is complete
+    // Current known issue: WASM exception during wxWidgets initialization
+    expect(errors).toHaveLength(0);
+  });
+
+});