feat(tikz): default math preamble, embedded-font SVG output - #42
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Bare diagram sources (no \documentclass) are now auto-wrapped in a standalone document with amsmath, amssymb, tikz, pgfplots, tikz-cd and tkz-euclide preloaded, so a diagram is just the tikzpicture body. New tikz_preamble config option injects extra preamble lines. dvisvgm no longer runs with --no-fonts: diagram text stays selectable and searchable in the SVG, falling back to outlined paths only when the TeX fonts are unavailable. texlive-fonts-recommended (amssymb/amsfonts) added to the Docker image and demo CI - pgfplots, tikz-cd and tkz-euclide already ship in texlive-pictures. Demo gains math-kit.tex exercising all three plugin families in one minimal source. Docs (en+zh) and changelog (en+zh) updated.
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What
\documentclass) are auto-wrapped in a standalone document withamsmath,amssymb,tikz,pgfplots,tikz-cd,tkz-euclidepreloaded — a diagram is just thetikzpicturebody (maths-encyclopedia-friendly).dvisvgmno longer runs with--no-fonts; diagram text stays selectable/searchable, with automatic fallback to outlined paths when TeX fonts are missing.tikz_preambleconfig option for extra preamble lines.texlive-fonts-recommended(amssymb/amsfonts); pgfplots/tikz-cd/tkz-euclide already ship in texlive-pictures.math-kit.tex(commutative diagram + function plot + Euclidean construction, no \documentclass) exercises the default preamble; docs/changelog en+zh updated.Verified
<text>elements in SVG).\documentclasswould disable auto-wrapping.CI