## Summary
- Pass `fakeLlmPort` through `preLaunchHook` so each parallel worker
uses its own fake LLM server instance
- Dynamically generate webServer configs in `playwright.config.ts` based
on parallelism setting
- Allow fake-llm-server to accept port via command line argument
(`--port=XXXX`)

This ensures parallel Playwright tests don't conflict when accessing the
fake LLM server.

## Test plan
- [x] Lint checks pass
- [x] All 784 unit tests pass
- [ ] Run E2E tests in parallel to verify no port conflicts

🤖 Generated with [Claude Code](https://claude.com/claude-code)
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<!-- This is an auto-generated description by cubic. -->
---
## Summary by cubic
Fixes parallel E2E conflicts by running a dedicated fake LLM server per
Playwright worker and passing its port through preLaunchHook, env vars,
and app/test URLs so all requests hit the worker’s server.

- **Bug Fixes**
- Compute per-worker fakeLlmPort (FAKE_LLM_BASE_PORT + parallelIndex),
expose via preLaunchHook, set FAKE_LLM_PORT, and pass into PageObject,
Settings, GitHubConnector; Azure tests use it for TEST_AZURE_BASE_URL.
- Use worker-scoped URLs for Azure, GitHub test APIs, Ollama, LM Studio,
Engine, Gateway, and OpenAI provider; Electron GitHub/Vercel handlers
read FAKE_LLM_PORT instead of hardcoded 3500.
- Generate one webServer per worker with build+start to avoid startup
races; health checks target each worker; reuse servers locally; extract
FAKE_LLM_BASE_PORT to e2e-tests/helpers/test-ports.ts.
- fake-llm-server accepts --port or PORT with NaN validation; docs
updated with parallel port isolation and rebase workflow notes.

<sup>Written for commit 407923e90ddc9cf4d9ec98ccc56849154d2ad932.
Summary will update on new commits.</sup>

<!-- End of auto-generated description by cubic. -->

---------
Co-authored-by: Will Chen <willchen90@gmail.com>
Co-authored-by: Claude Opus 4.5 <noreply@anthropic.com>
Co-authored-by: claude[bot] <41898282+claude[bot]@users.noreply.github.com>