Bug

The Prettier workflow runs prettier --write . on every non-main branch push, but two generated files are not excluded:

• frontend/src/renderer/routeTree.gen.ts
• frontend/pnpm-lock.yaml

When either generator produces output that differs from Prettier's rendering, the workflow can push a large formatter commit unrelated to the feature branch. Generated route output and package-manager lockfiles should remain owned by their generators.

Current main is already Prettier-clean, so this does not require a repository-wide formatting baseline.

Proposed fix

Add only those two generated paths to .prettierignore.

Acceptance criteria

• Prettier no longer rewrites the generated route tree or pnpm lockfile.
• Human-authored files remain covered by the workflow.
• The change contains no documentation or source formatting churn.

Ported and narrowed from the original rewrite issue.