ci(e2e): add @electron/get debug logging to diagnose binary download

The forced install.js still produced no path.txt and exited 0 silently,
so the download is being skipped/failing inside @electron/get rather than
at the skip-flag gate. Enable DEBUG=@electron/get:* and dump the electron
dir state to capture the actual cause in CI.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: CoderCoco

.github/workflows/e2e.yml

@@ -24,23 +24,25 @@ jobs:
       - run: npm ci
 
       - name: Install Electron binary
-        # The runner's npm ci leaves node_modules/electron without a path.txt
-        # (the postinstall binary download is skipped — the runner environment
-        # carries ELECTRON_SKIP_BINARY_DOWNLOAD), so the electron-smoke spec's
-        # `_electron.launch()` -> require('electron/index.js') throws "Electron
-        # failed to install correctly". Force a clean download here with the
-        # skip flag explicitly cleared, then assert path.txt exists so any
-        # future regression fails loudly at this step rather than mid-test.
+        # npm ci leaves node_modules/electron without a path.txt, so the
+        # electron-smoke spec's `_electron.launch()` -> require('electron/index.js')
+        # throws "Electron failed to install correctly". Force a clean download
+        # with @electron/get debug logging so we can see exactly what happens,
+        # then assert path.txt exists.
         env:
           ELECTRON_SKIP_BINARY_DOWNLOAD: ''
+          DEBUG: '@electron/get:*'
         run: |
-          cat node_modules/electron/path.txt 2>/dev/null \
-            && echo " <- path.txt present after npm ci" \
-            || echo "no path.txt after npm ci"
           rm -rf node_modules/electron/dist node_modules/electron/path.txt
+          set +e
           node node_modules/electron/install.js
-          cat node_modules/electron/path.txt && echo " <- path.txt written"
-          node -e "console.log('electron resolves to:', require('electron/index.js'))"
+          echo "==== install.js exit=$? ===="
+          set -e
+          echo "==== node_modules/electron contents ===="
+          ls -la node_modules/electron/
+          echo "==== dist contents ===="
+          ls -la node_modules/electron/dist/ 2>/dev/null || echo "NO dist/"
+          test -f node_modules/electron/path.txt
         timeout-minutes: 5
 
       # No explicit desktop:build step: @hyveon/web's `test:e2e` script always