Comprehensive documentation for the CSS preload fix that removes dynamic
link element creation in standalone bundles.
## Documents Added
1. **CSS_PRELOAD_FIX.md** - Complete technical documentation
- Root cause analysis of CSS loading failures
- Content-based search approach for minified code
- Solution implementation details
- Testing methodology and results
2. **EXTERNAL_PRELOAD_BUG_FIX.md** - External resource handling
- Documents the external preload link removal fix
- Test cases and verification methods
3. **test-slidev-standalone-integration.js** - Updated test suite
- Added "No CSS preload errors" verification check
- Ensures "Unable to preload CSS" error is not present in bundles
## Key Achievements
- Standalone bundles now work correctly via file:// protocol
- All console errors eliminated
- Slides render with full content and styling
- Automated test suite verifies all fixes
## Related Slidev Commit
- slidev@4a3229c - fix(bundler): Remove dynamic CSS/module preload function
