appview: add support for latex in markdown

Signed-off-by: noClaps <[e-mail]>

appview/pages/markup/markdown.go

···
 
 	chromahtml "github.com/alecthomas/chroma/v2/formatters/html"
 	"github.com/alecthomas/chroma/v2/styles"
+	treeblood "github.com/wyatt915/goldmark-treeblood"
 	"github.com/yuin/goldmark"
 	highlighting "github.com/yuin/goldmark-highlighting/v2"
 	"github.com/yuin/goldmark/ast"
···
 			extension.NewFootnote(
 				extension.WithFootnoteIDPrefix([]byte("footnote")),
 			),
+			treeblood.MathML(),
 		),
 		goldmark.WithParserOptions(
 			parser.WithAutoHeadingID(),

appview/pages/markup/sanitizer.go

···
 		"margin-bottom",
 	)
 
+	// math
+	mathAttrs := []string{
+		"accent", "columnalign", "columnlines", "columnspan", "dir", "display",
+		"displaystyle", "encoding", "fence", "form", "largeop", "linebreak",
+		"linethickness", "lspace", "mathcolor", "mathsize", "mathvariant", "minsize",
+		"movablelimits", "notation", "rowalign", "rspace", "rowspacing", "rowspan",
+		"scriptlevel", "stretchy", "symmetric", "title", "voffset", "width",
+	}
+	mathElements := []string{
+		"annotation", "math", "menclose", "merror", "mfrac", "mi", "mmultiscripts",
+		"mn", "mo", "mover", "mpadded", "mprescripts", "mroot", "mrow", "mspace",
+		"msqrt", "mstyle", "msub", "msubsup", "msup", "mtable", "mtd", "mtext",
+		"mtr", "munder", "munderover", "semantics",
+	}
+	policy.AllowNoAttrs().OnElements(mathElements...)
+	policy.AllowAttrs(mathAttrs...).OnElements(mathElements...)
+
 	return policy
 }
 

go.mod

···
 	github.com/stretchr/testify v1.10.0
 	github.com/urfave/cli/v3 v3.3.3
 	github.com/whyrusleeping/cbor-gen v0.3.1
-	github.com/yuin/goldmark v1.4.15
+	github.com/wyatt915/goldmark-treeblood v0.0.0-20250825231212-5dcbdb2f4b57
+	github.com/yuin/goldmark v1.7.12
 	github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc
 	golang.org/x/crypto v0.40.0
 	golang.org/x/net v0.42.0
···
 	github.com/vmihailenco/go-tinylfu v0.2.2 // indirect
 	github.com/vmihailenco/msgpack/v5 v5.4.1 // indirect
 	github.com/vmihailenco/tagparser/v2 v2.0.0 // indirect
+	github.com/wyatt915/treeblood v0.1.15 // indirect
 	gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b // indirect
 	gitlab.com/yawning/tuplehash v0.0.0-20230713102510-df83abbf9a02 // indirect
 	go.opentelemetry.io/auto/sdk v1.1.0 // indirect

go.sum

···
 github.com/warpfork/go-wish v0.0.0-20220906213052-39a1cc7a02d0/go.mod h1:x6AKhvSSexNrVSrViXSHUEbICjmGXhtgABaHIySUSGw=
 github.com/whyrusleeping/cbor-gen v0.3.1 h1:82ioxmhEYut7LBVGhGq8xoRkXPLElVuh5mV67AFfdv0=
 github.com/whyrusleeping/cbor-gen v0.3.1/go.mod h1:pM99HXyEbSQHcosHc0iW7YFmwnscr+t9Te4ibko05so=
+github.com/wyatt915/goldmark-treeblood v0.0.0-20250825231212-5dcbdb2f4b57 h1:UqtQdzLXnvdBdqn/go53qGyncw1wJ7Mq5SQdieM1/Ew=
+github.com/wyatt915/goldmark-treeblood v0.0.0-20250825231212-5dcbdb2f4b57/go.mod h1:BxSCWByWSRSuembL3cDG1IBUbkBoO/oW/6tF19aA4hs=
+github.com/wyatt915/treeblood v0.1.15 h1:3KZ3o2LpcKZAzOLqMoW9qeUzKEaKArKpbcPpTkNfQC8=
+github.com/wyatt915/treeblood v0.1.15/go.mod h1:i7+yhhmzdDP17/97pIsOSffw74EK/xk+qJ0029cSXUY=
 github.com/yuin/goldmark v1.1.27/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.2.1/go.mod h1:3hX8gzYuyVAZsxl0MRgGTJEmQBFcNTphYh9decYSb74=
 github.com/yuin/goldmark v1.3.5/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.1/go.mod h1:mwnBkeHKe2W/ZEtQ+71ViKU8L12m81fl3OWwC1Zlc8k=
 github.com/yuin/goldmark v1.4.13/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
-github.com/yuin/goldmark v1.4.15 h1:CFa84T0goNn/UIXYS+dmjjVxMyTAvpOmzld40N/nfK0=
 github.com/yuin/goldmark v1.4.15/go.mod h1:6yULJ656Px+3vBD8DxQVa3kxgyrAnzto9xy5taEt/CY=
+github.com/yuin/goldmark v1.7.12 h1:YwGP/rrea2/CnCtUHgjuolG/PnMxdQtPMO5PvaE2/nY=
+github.com/yuin/goldmark v1.7.12/go.mod h1:ip/1k0VRfGynBgxOz0yCqHrbZXhcjxyuS66Brc7iBKg=
 github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc h1:+IAOyRda+RLrxa1WC7umKOZRsGq4QrFFMYApOeHzQwQ=
 github.com/yuin/goldmark-highlighting/v2 v2.0.0-20230729083705-37449abec8cc/go.mod h1:ovIvrum6DQJA4QsJSovrkC4saKHQVs7TvcaeO8AIl5I=
 gitlab.com/yawning/secp256k1-voi v0.0.0-20230925100816-f2616030848b h1:CzigHMRySiX3drau9C6Q5CAbNIApmLdat5jPMqChvDA=