feat(字体解耦): 解耦字体依赖，完善字体处理

go.mod

@@ -3,11 +3,11 @@ module github.com/xiaoqidun/ofdgo
 go 1.26.0
 
 require (
+	github.com/andybalholm/brotli v1.2.6
 	github.com/emmansun/gmsm v0.45.0
 	github.com/go-fonts/latin-modern v0.3.3
 	github.com/go-text/typesetting v0.3.5
 	github.com/tdewolff/canvas v0.0.0-20260923214215-09804640d00c
-	github.com/tdewolff/font v0.0.0-20260913163313-54f98bb59ee6
 	github.com/xiaoqidun/j2kgo v0.0.0-20261009063910-4865a21ef893
 	github.com/xiaoqidun/jbig2 v1.1.4
 	github.com/xiaoqidun/pdfgo v0.0.0-20261010065159-b32618b0bdd7
@@ -23,12 +23,12 @@ require (
 	github.com/BurntSushi/xgb v0.0.0-20210121224620-deaf085860bc // indirect
 	github.com/BurntSushi/xgbutil v0.0.0-20190907113008-ad855c713046 // indirect
 	github.com/ByteArena/poly2tri-go v0.0.0-20170716161910-d102ad91854f // indirect
-	github.com/andybalholm/brotli v1.2.2 // indirect
 	github.com/benoitkugler/textlayout v0.3.2 // indirect
 	github.com/benoitkugler/textprocessing v0.0.6 // indirect
 	github.com/golang/freetype v0.0.0-20170609003504-e2365dfdc4a0 // indirect
 	github.com/srwiley/rasterx v0.0.0-20220730225603-2ab79fcdd4ef // indirect
 	github.com/srwiley/scanx v0.0.0-20190309010443-e94503791388 // indirect
+	github.com/tdewolff/font v0.0.0-20260822205238-d0d2f004b117 // indirect
 	github.com/tdewolff/minify/v2 v2.24.17 // indirect
 	github.com/tdewolff/parse/v2 v2.8.16 // indirect
 	github.com/yuin/goldmark v1.8.5 // indirect