Implemented comprehensive message content enhancements for both channel messages and DMs:
- **Mention badges**: @[Username] mentions now display as styled badges similar to Android Meshcore app
- **Clickable URLs**: http:// and https:// URLs are automatically converted to clickable links that open in new tabs
- **Image thumbnails**: URLs ending in .jpg, .jpeg, .png, .gif, .webp display as thumbnails with click-to-expand modal preview
- **Mobile responsive**: Image thumbnails adapt size for mobile screens
- **Security**: Proper XSS protection with HTML escaping and attribute sanitization
Technical implementation:
- Created shared message-utils.js module for content processing
- Added CSS styles for badges, links, images, and modal preview
- Updated both app.js and dm.js to use new content processor
- Used event delegation for image click handlers to support dynamic content
- Responsive design with mobile-optimized image sizes
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Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
