# Dependency Updates Summary
Generated: 2026-02-19
Last Updated: 2026-02-20

---

## Build System Updates (2026-02-20)

### npm Version Update:
- **Backend Dockerfile**: Updated to install npm@latest globally during build
  - Previous: npm 10.8.2 (bundled with Node 20)
  - Updated: npm 11.10.1
  - Change: Added `npm install -g npm@latest` after bun installation
  - Benefit: Latest npm features, bug fixes, and security updates

### Tailwind CSS v4 Compatibility Fixes:
- **Frontend PostCSS Configuration**: Updated to use new Tailwind v4 plugin
  - Previous: `tailwindcss: {}` in postcss.config.js
  - Updated: `'@tailwindcss/postcss': {}` in postcss.config.js
  - Added: `@tailwindcss/postcss: ^4.0.0` to devDependencies
  - Fixes: Build error "The PostCSS plugin has moved to a separate package"
  - Compatibility: Tailwind CSS v4.2.0

---

## Backend Dependencies Updates

### MAJOR VERSION UPDATES:

1. **zod**: 3.24.1 → 4.3.6
   - Major version bump
   - Potential breaking changes in validation API

2. **bcryptjs**: 2.4.3 → 3.0.3
   - Major version bump
   - Potential breaking changes in hashing API

3. **@types/bcryptjs**: 2.4.6 → 3.0.0
   - TypeScript types update to match bcryptjs v3

### MINOR/PATCH UPDATES:

4. **jsonwebtoken**: 9.0.2 → 9.0.3
   - Patch update, should be compatible

### ALREADY UP-TO-DATE:
- @elysiajs/cors: 1.4.1 ✓
- @elysiajs/swagger: 1.3.1 ✓
- elysia: 1.4.25 ✓
- pg: 8.18.0 ✓
- postgres: 3.4.8 ✓
- dotenv: 17.3.1 ✓
- @types/pg: 8.16.0 ✓
- @types/jsonwebtoken: 9.0.10 ✓

---

## Frontend Dependencies Updates

### MAJOR VERSION UPDATES:

1. **next-auth**: 5.0.0-beta.25 → 5.0.0-beta.30
   - Updated to latest v5 beta (not downgraded to v4)
   - Maintains feature set, gets bug fixes
   - Decision: Keep on v5 beta as it's the future version

2. **recharts**: 2.15.4 → 3.7.0
   - Major version bump
   - Potential breaking changes in chart components

3. **tailwind-merge**: 2.6.1 → 3.5.0
   - Major version bump
   - Potential breaking changes in class merging logic

4. **@types/node**: 22.12.0 → 25.3.0
   - Major version bump
   - Updated TypeScript definitions for Node.js

5. **tailwindcss**: 3.4.19 → 4.2.0
   - Major version bump
   - Tailwind CSS v4 has significant changes to configuration and API
   - May require updating tailwind.config.js configuration

### MINOR/PATCH UPDATES:

6. **react**: 19.1.0 → 19.2.4
   - Patch update, should be compatible

7. **react-dom**: 19.1.0 → 19.2.4
   - Patch update, should be compatible

### ALREADY UP-TO-DATE:
- next: 16.1.6 ✓
- lucide-react: 0.574.0 ✓
- date-fns: 4.1.0 ✓
- @radix-ui/react-dialog: 1.1.15 ✓
- @radix-ui/react-dropdown-menu: 2.1.16 ✓
- @radix-ui/react-slot: 1.2.4 ✓
- @radix-ui/react-tabs: 1.1.13 ✓
- @radix-ui/react-toast: 1.2.15 ✓
- class-variance-authority: 0.7.1 ✓
- clsx: 2.1.1 ✓
- typescript: 5.9.3 ✓
- postcss: 8.5.6 ✓
- autoprefixer: 10.4.24 ✓
- @types/react: 19.2.14 ✓
- @types/react-dom: 19.2.3 ✓

---

## Known Compatibility Issues & Recommendations

### High Priority:
1. **tailwindcss v4**: This is a major update with significant changes. The project's configuration files (tailwind.config.js, postcss.config.js) may need updates. Note: Tailwind v4 is designed to be backward compatible with v3 configs in most cases.
   - **FIXED (2026-02-20)**: Updated postcss.config.js to use `@tailwindcss/postcss` plugin instead of `tailwindcss` directly. Added `@tailwindcss/postcss: ^4.0.0` to devDependencies.

### Medium Priority:
2. **zod v4**: Check if validation schemas need updates.
3. **bcryptjs v3**: Check if password hashing/verification code needs updates.
4. **recharts v3**: Chart components may need updates to match new API.

### Low Priority:
5. **@types/node v25**: Usually compatible, but check for any Node.js API changes.

---

## Testing Checklist

After updating dependencies:
- [ ] Run `npm install` in both backend and frontend
- [ ] Run `npm run build` in frontend
- [ ] Test authentication flow (next-auth)
- [ ] Test API endpoints
- [ ] Test database connections
- [ ] Test all UI components and charts
- [ ] Run any existing tests
- [ ] Check console for deprecation warnings
- [ ] Test Docker build (`docker-compose build`)

---

## Rollback Plan

If issues arise after updates:
1. Revert package.json changes
2. Run `npm install` to restore previous versions
3. Commit and push revert

To revert: `git checkout HEAD~1` (if committed)
Or restore from backup: `cp package.json.backup package.json`

---

## Summary

**Total dependencies updated:**
- Backend: 3 dependencies (1 major, 1 patch, 1 type update)
- Frontend: 7 dependencies (5 major, 2 patch)

**Changes committed:** Yes (commit 1573e07)
**Changes pushed to remote:** Yes

**Next steps:**
1. Pull latest changes: `git pull`
2. Install dependencies in both directories:
   - Backend: `cd backend && bun install` (or `npm install`)
   - Frontend: `cd frontend && npm install`
3. Test build: `npm run build` (frontend)
4. Run the testing checklist above
5. Monitor for deprecation warnings or errors

**If issues occur:** Refer to rollback plan above or reach out for assistance.