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/download/[sermonId].get.ts

@@ -42,7 +42,26 @@ export default defineEventHandler(async (event) => {
 
   // Get user's notes
   const noteRecord = getSermonNote(user.id!, sermonId)
-  const userNotes = noteRecord?.notes || 'No notes taken'
+  // Convert HTML to plain text for download
+  const htmlToText = (html: string) => {
+    if (!html) return 'No notes taken'
+    return html
+      .replace(/<br\s*\/?>/gi, '\n')
+      .replace(/<\/p>/gi, '\n')
+      .replace(/<p[^>]*>/gi, '')
+      .replace(/<\/h[1-6]>/gi, '\n')
+      .replace(/<h[1-6][^>]*>/gi, '')
+      .replace(/<li[^>]*>/gi, '• ')
+      .replace(/<\/li>/gi, '\n')
+      .replace(/<[^>]+>/g, '')
+      .replace(/&nbsp;/g, ' ')
+      .replace(/&amp;/g, '&')
+      .replace(/&lt;/g, '<')
+      .replace(/&gt;/g, '>')
+      .replace(/&quot;/g, '"')
+      .trim()
+  }
+  const userNotes = htmlToText(noteRecord?.notes || '')
 
   // Format bible references
   let bibleReferencesText = ''