feat(fonts): 后端字体命令 fonts_get_system_fonts 及 ui_font/mono_font 设置字段

Cargo.toml

@@ -44,6 +44,7 @@ encoding_rs = "0.8.35"
 enumset = "1.1.10"
 eyre = "0.6.12"
 flate2 = "1.1.4"
+fontdb = "0.24.0"
 fs4 = { version = "0.13.1", default-features = false }
 futures = "0.3.31"
 futures-lite = "2.6.1"