⚡ Bolt: Replace bcryptjs with native bcrypt

[davidraehles]

💡 What: The optimization implemented is replacing the pure JavaScript bcryptjs library with the native C++ bcrypt library in the backend.
🎯 Why: Native C++ bindings provided by the bcrypt package are significantly faster and offload work to the thread pool, preventing the Node.js event loop from being blocked by intensive cryptographic operations.
📊 Measured Improvement:
Measured a significant performance boost using a benchmark of 10 iterations:

• Hashing: ~1252ms (bcryptjs) vs ~768ms (bcrypt) -> ~38% faster
• Comparison: ~1048ms (bcryptjs) vs ~767ms (bcrypt) -> ~27% faster

Also fixed pre-existing type errors in backend/src/routes/notes.ts where req.params.id was causing type mismatches with Prisma, ensuring a clean build with updated dependencies.

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PR created automatically by Jules for task 4337124487153461403 started by @davidraehles

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[Copilot]

Pull request overview

This PR optimizes authentication performance by replacing the pure JavaScript bcryptjs library with the native C++ bcrypt library, yielding significant performance improvements (~38% faster hashing, ~27% faster password comparison). The PR also fixes pre-existing TypeScript type errors in the notes routes where req.params.id was causing type mismatches with Prisma.

Changes:

• Replaced bcryptjs with native bcrypt (v6.0.0) for significant performance gains by offloading cryptographic operations to the Node.js thread pool
• Fixed TypeScript type errors in notes routes by explicitly casting req.params.id to string
• Added performance learnings documentation in .jules/bolt.md

Reviewed changes

Copilot reviewed 4 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
backend/package.json	Updated dependencies: replaced bcryptjs with bcrypt@6.0.0 and @types/bcryptjs with @types/bcrypt@6.0.0
backend/src/routes/auth.ts	Changed import from bcryptjs to bcrypt (API-compatible)
backend/src/routes/notes.ts	Fixed type errors by explicitly casting req.params.id to string in PUT and DELETE routes
backend/pnpm-lock.yaml	New lockfile with bcrypt@6.0.0 and its native dependencies (node-addon-api, node-gyp-build)
.jules/bolt.md	Added performance learnings documentation comparing bcryptjs vs bcrypt benchmarks

Files not reviewed (1)

• backend/pnpm-lock.yaml: Language not supported

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[Copilot]

The repository now has both pnpm-lock.yaml and package-lock.json present, which can lead to inconsistent dependency installations depending on which package manager is used. Since this PR introduces pnpm-lock.yaml, package-lock.json should be removed and added to .gitignore to ensure the team consistently uses pnpm for dependency management.

[davidraehles]

Removed pnpm-lock.yaml. This repo uses npm with package-lock.json.

[google-labs-jules]

I apologize for the confusion. I've removed the pnpm-lock.yaml file and updated the package-lock.json using npm instead. I've verified that bcrypt is correctly installed and functional.