fix(pdf): keep PDF.js external in production

[j15z]

Summary

• keep PDF.js external to Next.js server bundles so its worker and canvas dependencies resolve at runtime
• add a regression test that protects the production packaging requirement

Type of Change

• Bug fix

Testing

• bun run test next-config.test.ts lib/file-parsers/pdfjs-server.test.ts lib/file-parsers/pdf-parser.test.ts (9 tests passed)
• bun run lint
• bun run apps/sim/scripts/check-block-registry.ts origin/staging
• bun run check:audits (45 audits passed)
• bun run docs-manifest:check

Checklist

• Code follows project style guidelines
• Self-reviewed my changes
• Tests added/updated and passing
• No new warnings introduced
• I confirm that I have read and agree to the terms outlined in the Contributor License Agreement (CLA)

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1 Skipped Deployment

Project	Deployment	Actions	Updated
docs	Skipped		Sep 2, 2026 8:01pm UTC

[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}

[greptile-apps]

Greptile Summary

The PR keeps pdfjs-dist external to Next.js production server bundles so PDF.js runtime dependencies remain resolvable.

• Adds pdfjs-dist to serverExternalPackages.
• Adds a correctly named and discoverable regression test for the packaging configuration.

Confidence Score: 5/5

The PR appears safe to merge.

No blocking failure remains.

Important Files Changed

Filename	Overview
apps/sim/next.config.ts	Adds pdfjs-dist to the server external-package list, preserving its runtime package layout.
apps/sim/next.config.test.ts	Adds a discoverable Node-environment regression test and resolves the previously reported filename mismatch.

_{Reviews (2): Last reviewed commit: "chore(pdf): align config test filename" | Re-trigger Greptile}

[j15z]

@greptile

[j15z]

@cubic-dev-ai review this PR

[cubic-dev-ai]

@cubic-dev-ai review this PR

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[cubic-dev-ai]

No issues found across 2 files

Confidence score: 5/5

• Automated review surfaced no issues in the provided summaries.
• No files require special attention.

_{Re-trigger cubic}