build(fonts): remove legacy KaTeX font formats

[murongg]

Summary

• keep the bundled Noto Sans SC Variable font unchanged and add regression coverage for editor fallbacks
• rewrite KaTeX font-face sources to WOFF2 during production builds
• remove only legacy KaTeX WOFF and TTF assets no longer referenced by generated CSS

Why

• recover about 0.78 MiB, or 5.6%, from the desktop frontend bundle without sacrificing cross-platform font consistency or glyph coverage

Validation

• pnpm --filter @markra/scripts test — 7 tests passed
• pnpm --filter @markra/app test -- src/styles.test.ts — 60 tests passed
• pnpm --filter @markra/editor test -- src/codemirror/code-block.test.ts src/codemirror/frontmatter-preview.test.ts — 36 tests passed
• pnpm build — workspace, web, desktop, and 15 vendor chunk imports passed
• pnpm tauri build --bundles app — macOS release app built and launched successfully
• packaged-app smoke test — multilingual text, inline math, display integral, and large delimiters rendered correctly; no font or resource errors appeared in logs

Risk

• KaTeX now ships WOFF2 only in generated bundles. Current targets handle WOFF2, and the build plugin retains any legacy asset still referenced if upstream CSS output changes.
• Windows and Linux native packages were not built or runtime-smoke-tested in this local macOS environment.

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Project	Deployment	Actions	Updated (UTC)
markra-web	Ready	Preview, Comment	Jul 28, 2026 9:25am