* Add rerun action for failed automations
Adds a recoverable failed automation rerun action in the run detail view, with pending-state handling and focused view-state coverage.
Design doc: docs/failed-automation-rerun-action.md
* Rebuild Electron binary before PR tests
- Ensure Node-based unit tests can import `electron` after install blocks package postinstall
- Generate Electron's required `path.txt` in the PR workflow
