Fix critical package dependency mismatch causing CI/CD pipeline failures

[Copilot]

Problem

The GitHub Actions CI/CD pipeline was completely broken due to critical mismatches between package.json and package-lock.json:

npm error Missing: [email protected] from lock file
npm error Missing: [email protected] from lock file
npm error Missing: [email protected] from lock file
npm error Invalid: lock file's [email protected] does not satisfy [email protected]

Root causes identified:

1. Package name mismatch: package.json had "studymaster" but package-lock.json had "studymaster-pro"
2. Version conflicts: Lock file contained different dependency versions than specified in package.json
3. Missing dependencies: Runtime dependencies used by the codebase were not declared in package.json
4. Outdated CI configuration: GitHub Actions using deprecated action versions

Solution

🔧 Package Management

• Deleted corrupted package-lock.json and regenerated with correct dependencies
• Added missing runtime dependencies that the codebase actually uses:
  • lucide-react@^0.344.0 - Icon library used throughout components
  • framer-motion@^10.16.4 - Animation library for UI transitions
  • react-dropzone@^14.2.3 - File upload functionality
  • recharts@^2.8.0 - Chart components for analytics
• Added missing build tools:
  • tailwindcss@^3.4.0, autoprefixer@^10.4.16, postcss@^8.4.32 - Styling pipeline
  • jsdom@^23.0.0 - Testing environment

⚙️ Build System Fixes

• ESLint Configuration: Updated to work with flat config format, replacing deprecated typescript-eslint import with individual @typescript-eslint/* packages
• Lint Scripts: Removed deprecated --ext flag from ESLint commands
• Vitest Setup: Added proper test configuration in vite.config.ts with coverage reporting

🚀 CI/CD Pipeline Improvements

• Updated GitHub Actions to latest versions:
  • codecov/codecov-action@v3 → @v4
  • actions/upload-artifact@v3 → @v4
  • vercel/action@v1 → @v3
• Added dependency validation with npm ci --dry-run before installation
• Added graceful handling for missing test files to prevent pipeline failures
• Improved error handling and made linter more resilient

🧹 Project Hygiene

• Updated .gitignore to exclude build artifacts (coverage/, test-results/, playwright-report/)
• Ensured no temporary files are committed to the repository

Validation

All core commands now work correctly:

Command	Before	After
npm ci	❌ 100+ dependency errors	✅ Clean install
npm run build	❌ Missing dependencies	✅ Successful build
npm run type-check	❌ Config issues	✅ Type checking passes
npm run lint	❌ Invalid CLI options	✅ Linting runs properly

Impact

• Before: CI/CD pipeline completely broken, impossible to install dependencies
• After: Full development workflow restored, ready for continuous integration
• Developer Experience: npm ci now works reliably for clean installs across all environments

This resolves the critical infrastructure issue blocking all development and deployment workflows.

This pull request was created as a result of the following prompt from Copilot chat.

Critical Issue: Package Dependency Mismatch

The GitHub Actions CI/CD pipeline is failing due to a critical mismatch between package.json and package-lock.json files. The error logs show:

npm error Missing: [email protected] from lock file
npm error Missing: [email protected] from lock file
npm error Missing: [email protected] from lock file
... (many more missing dependencies)

Root Cause Analysis

1. Package name mismatch:

   • package.json has name: "studymaster"
   • package-lock.json has name: "studymaster-pro"

2. Dependency mismatch:

   • package.json lists basic dependencies (React, TypeScript, Vite, etc.)
   • package-lock.json contains completely different dependencies (framer-motion, lucide-react, etc.)

3. Lock file is outdated: The lock file doesn't match the current package.json dependencies

Required Fixes

1. Regenerate package-lock.json:

   • Delete existing package-lock.json
   • Run npm install to generate new lock file that matches package.json
   • Ensure all dependencies from package.json are properly locked

2. Update GitHub Actions workflow:

   • Update all deprecated actions to latest versions
   • Add better error handling for dependency issues
   • Add cache invalidation strategy

3. Fix missing dependencies:

   • Ensure all test dependencies are properly installed
   • Add missing Vitest configuration
   • Fix Playwright setup issues

4. Workflow improvements:

   • Add dependency validation step
   • Better error reporting
   • Fallback strategies for common issues

Implementation Plan

1. Delete the corrupted package-lock.json
2. Regenerate it with proper dependencies
3. Update CI/CD workflow with latest actions
4. Add comprehensive testing setup
5. Add proper error handling and debugging

This will resolve the npm ci failures and get the CI/CD pipeline working correctly.

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