[luojiyin1987]

Problem

The current test script runs Jest without a build. Test helpers load the parser from dist/. Local tests can use old build files after source changes.

Changes

• Add test:built to run the full suite against the current build.
• Make pnpm test build the package before it runs tests.
• Make test:update build the package before it updates snapshots.
• Make CI use test:built after its build step.
• Make prepublishOnly use test:built after its build step.

Validation

• Remove dist/, then run pnpm test successfully.
• Run pnpm run build and pnpm run test:built successfully.
• Run pnpm run prepublishOnly successfully.
• Remove dist/, then run pnpm run test:update successfully.
• Confirm all 27 Jest suites and 2024 tests pass.
• Confirm type, package, MDX, and benchmark entry checks pass.
• Confirm API reports have no changes.
• Run git diff --check successfully.

No sensitive data was added or redacted.