🎉 Major modernization release bringing AdminLTE to current standards
## Key Improvements:
- 🔒 Zero security vulnerabilities (all dependencies updated)
- ⚡ ESLint v9 with modern flat configuration
- 📦 Astro 5.x, Bootstrap 5.3.7, 50+ package updates
- 🛠️ New npm scripts: 'npm start', 'npm run build'
- 🧹 700+ linting issues resolved, technical debt cleaned
- 🎯 ES modules, modern tooling, optimal bundles
## Infrastructure:
- Upgraded to ES modules with proper configurations
- Migrated ESLint to v9 flat config format
- Enhanced build scripts and developer experience
- Added comprehensive CHANGELOG.md
- Updated README.md with v4.0.0-rc1 highlights
## Quality & Security:
- All npm vulnerabilities resolved
- Zero linting errors across JS/TS/CSS/Astro
- Updated browserslist and build dependencies
- Removed deprecated patterns and dead code
## Compatibility:
- No breaking changes for end users
- Full Bootstrap 5.3.7 compatibility maintained
- All HTML templates remain compatible
- Enhanced developer experience with modern tooling
See CHANGELOG.md for complete details.
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