- Implement Obsidian/Bear-style live preview via CM6 ViewPlugin + decorations
- Headings: ## markers hidden, text rendered large — revealed on cursor line
- Bold/italic: ** and * markers hidden, text styled — revealed on cursor line
- Links: [text](url) rendered as styled text — revealed on cursor line
- Inline code: backticks hidden, content styled with monospace — revealed on cursor line
- Horizontal rules rendered as styled <hr> elements
- Add Playwright test verifying reveal-on-focus behavior
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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