feat: Add rich text formatting to sermon notes

Implement comprehensive rich text editing capabilities using Tiptap editor with full formatting toolbar and functionality.

Features:
- Bold, italic, underline, strikethrough text formatting
- Highlight text with yellow marker
- Bullet and numbered lists
- Heading styles (H2, H3)
- Text alignment (left, center, right)
- Undo/redo support
- Clear formatting option
- Intuitive toolbar with icons and tooltips
- Responsive font size support

Technical changes:
- Added Tiptap dependencies to package.json (@tiptap/vue-3, starter-kit, extensions)
- Created RichTextEditor component with full toolbar and formatting options
- Integrated editor into sermon notes section replacing textarea
- Updated download API to convert HTML to formatted plain text
- Updated email API to handle HTML content properly
- Notes now stored as HTML with rich formatting preserved

The editor provides a professional writing experience with all standard formatting tools while maintaining automatic save functionality and seamless integration with email/download features.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

server/api/notes/email/[sermonId].post.ts

@@ -41,10 +41,9 @@ export default defineEventHandler(async (event) => {
     })
   }
 
-  // Get user's notes
+  // Get user's notes (already stored as HTML from rich text editor)
   const noteRecord = getSermonNote(user.id!, sermonId)
-  // Convert line breaks to HTML breaks for email display
-  const userNotes = noteRecord?.notes ? noteRecord.notes.replace(/\n/g, '<br>') : ''
+  const userNotes = noteRecord?.notes || '<p>No notes taken</p>'
 
   // Format bible references for HTML email
   let bibleReferencesText = ''