# Release v0.13.1 - Theme Detection Fix & Documentation Policy

## Summary
Fixed hardcoded theme detection issue that was defaulting to 'light' theme regardless of environment. Implemented comprehensive documentation policy to prevent future overselling.

## Changes Made

### 🔧 **Bug Fixes**
- **Theme Detection**: Fixed `optimize_display()` hardcoded 'light' theme detection
- **Google Colab Compatibility**: Enhanced dynamic theme detection for dark mode environments
- **Environment Variables**: Added support for `COLAB_THEME` environment variable
- **CSS Enhancement**: Improved CSS with media queries for auto-theme adaptation

### 📚 **Documentation Policy Framework**  
- **DOCUMENTATION_POLICY.md**: Comprehensive "underpromise, overdeliver" policy
- **check_documentation_language.py**: Automated language checking tool
- **DOCUMENTATION_REVIEW_TEMPLATE.md**: Standardized review process
- **POLICY_IMPLEMENTATION_GUIDE.md**: Integration instructions for future use

### 📝 **Language Improvements**
- Removed overselling language (perfect, amazing, revolutionary)
- Replaced absolute statements with realistic qualifiers
- Updated documentation tone to be factual and professional
- Fixed excessive emoji usage in documentation

## Technical Details

### Enhanced Theme Detection
```python
def _detect_colab_theme() -> str:
    # Check environment variables first
    theme_hint = os.environ.get('COLAB_THEME', '').lower()
    if theme_hint in ['dark', 'light']:
        return theme_hint
    
    # JavaScript detection attempts...
    # System preference checking...
    
    return 'auto'  # Smart fallback
```

### Dynamic CSS Implementation
- Added CSS variables for theme adaptation
- Media query support: `@media (prefers-color-scheme: dark/light)`
- Platform-specific selectors for Colab dark mode detection
- Smooth transitions for theme changes

## Impact

### User Experience
- Better display compatibility in dark-themed environments
- Improved Google Colab dark mode support
- More realistic documentation expectations

### Developer Experience
- Automated policy enforcement tools
- Clear review templates and guidelines
- Systematic prevention of overselling language

## Files Modified
- `edaflow/display.py` - Theme detection fixes and enhanced CSS
- `README.md` - Language improvements and realistic expectations
- `CHANGELOG.md` - Added v0.13.1 entry with factual language
- `pyproject.toml` - Version bump to 0.13.1
- `edaflow/__init__.py` - Version update

## Files Added
- `DOCUMENTATION_POLICY.md` - Core policy framework
- `check_documentation_language.py` - Automated checker tool
- `DOCUMENTATION_REVIEW_TEMPLATE.md` - Review process template
- `POLICY_IMPLEMENTATION_GUIDE.md` - Integration instructions
- `test_dynamic_theme_detection.py` - Theme detection validation

## Testing
✅ Theme detection verified as dynamic (not hardcoded)  
✅ Environment variable testing successful
✅ Package build and integrity checks passed
✅ Documentation language policy compliance improved

## Release Verification
- [x] Version numbers updated consistently
- [x] Package builds successfully  
- [x] Theme detection works dynamically
- [x] Documentation policy framework complete
- [x] twine check passes

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**This release demonstrates our commitment to honest communication and user trust through both technical fixes and systematic policy improvements.**
