fix(MermaidViewer): clean up orphan error SVG left in document.body#184

matt1398 merged 1 commit intomatt1398:mainmatt1398/claude-devtools:mainfrom

GoldenXPig:fix/mermaid-orphan-error-svgGoldenXPig/claude-devtools:fix/mermaid-orphan-error-svgCopy head branch name to clipboard