feat: enhance Semantic Mermaid Diff with pane separation and fix KaTeX block diff styling - #78
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…X block diff styling
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Aug 30, 2026
…and-katex-styling feat: enhance Semantic Mermaid Diff with pane separation and fix KaTeX block diff styling
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Summary
v1: deleted red / modified amber) and Right Pane (v2: added green / modified amber), aligning diagram diff behavior with all other text, table, and image diffs in Rich Markdown Diff.#132a1c,#2e2305,#2c1214), vivid border strokes (#22c55e,#f59e0b,#ef4444), and high-contrast text (#4ade80,#fbbf24,#f87171)..katex-blockfrom the transparent reset CSS block and added dedicated:has(> .katex-block)diff container styling to preserve green insertion background (var(--diff-inserted-bg)) and borders without double margins/padding.fixtures/comprehensive_{v1,v2}.md, unit tests, snapshot files, and Playwright VRT baselines.Verification
pnpm run test:unit): 233 passing