Fix broken edit mode that prevented content rendering due to:
- Unescaped newline literals causing JavaScript string syntax errors
- Inconsistent brace escaping in f-string templates
- Template literal syntax issues with variable interpolation
The edit mode now properly renders content AND provides editing capabilities.
Also added html-inject-editing command for standalone HTML enhancement
with graceful fallback options.
🤖 Generated with [Claude Code](https://claude.ai/code)
Co-Authored-By: Claude <noreply@anthropic.com>