ec5a82ae4a
- Replace embed preview toggle with full post preview mode - Preview button positioned in center of toolbar with label - Shows "Preview" in edit mode, "Edit" in preview mode - Preview displays how the post will actually render with NoteContent - Renders all embeds, hashtags, and URLs as they would appear - Mock event created for preview with current content - Bordered preview area with subtle background - Only shows toggle when content exists Co-authored-by: shakespeare.diy <assistant@shakespeare.diy>