fix(e2e): enable SwiftShader for WebGL on Linux CI

Chrome 137+ deprecated automatic SwiftShader fallback for WebGL.
Without --enable-unsafe-swiftshader, WebGL context creation silently
fails on GPU-less CI runners, causing black views and test timeouts.
This is the same flag vtk-js uses in its CI.

Also removes the manual chromedriver download step which wasn't
helping — the real issue was WebGL, not chromedriver.

Author: PaulHax

.github/workflows/e2e.yml

@@ -26,12 +26,6 @@ jobs:
       - name: Install xvfb (linux)
         if: matrix.os == 'ubuntu-latest'
         run: sudo apt-get install xvfb
-      - name: Install matching ChromeDriver (linux)
-        if: matrix.os == 'ubuntu-latest'
-        run: |
-          CHROME_MAJOR=$(google-chrome --version | grep -oP '\d+' | head -1)
-          npx @puppeteer/browsers install chromedriver@$CHROME_MAJOR
-          echo "CHROMEDRIVER_PATH=$(find . -path "*/chromedriver-linux64/chromedriver" -type f | head -1)" >> $GITHUB_ENV
       - name: Run E2E on chrome (linux)
         if: matrix.os == 'ubuntu-latest'
         run: xvfb-run --server-args="-screen 0, 1400x1000x24" --auto-servernum npm run test:e2e:chrome

wdio.chrome.conf.ts

@@ -6,7 +6,8 @@ if (process.env.CI || process.env.GITHUB_ACTIONS) {
   chromeArgs.push(
     '--no-sandbox',
     '--disable-dev-shm-usage',
-    '--disable-infobars'
+    '--disable-infobars',
+    '--enable-unsafe-swiftshader'
   );
 }
 
@@ -16,11 +17,6 @@ export const config = {
     {
       browserName: 'chrome',
       // this overrides the default chrome download directory with our temporary one
-      ...(process.env.CHROMEDRIVER_PATH && {
-        'wdio:chromedriverOptions': {
-          binary: process.env.CHROMEDRIVER_PATH,
-        },
-      }),
       'goog:chromeOptions': {
         args: chromeArgs,
         prefs: {