Fixed two email rendering issues:
1. Card Success Styling
- Was using hero gradient (purple) instead of green theme
- Now uses proper green background (#f0fdf4) with green border
- Info card: blue theme with border
- Warning card: orange theme with border
- Hero card: keeps gradient as intended
2. List Support Verification
- MarkdownParser already supports bullet lists
- Supports: *, -, •, ✓, ✔ as list markers
- Properly converts to <ul><li> HTML
- Works in both visual editor and email preview
Card Types Now:
- default: white background
- hero: gradient background (purple)
- success: green background with left border
- info: blue background with left border
- warning: orange background with left border