fix: syntax highlighting was broken in bundled app

Cargo.toml

@@ -60,7 +60,7 @@ ort = { version = "=2.0.0-rc.12", default-features = false, features = ["std", "
 russh = "0.62.2"
 ratatui = "0.30.2"
 ratatui-image = { version = "11.0.6", default-features = false, features = ["crossterm", "image-defaults"] }
-tui-markdown = "0.3.8"
+tui-markdown = { version = "0.3.8", default-features = false }
 
 # UI framework
 iced = { version = "0.13", features = ["wgpu", "advanced", "canvas", "image", "svg", "tokio", "markdown"] }
@@ -68,7 +68,7 @@ iced = { version = "0.13", features = ["wgpu", "advanced", "canvas", "image", "s
 # Editor widget
 cosmic-text = "0.12"
 ropey = "1"
-syntect = "5"
+syntect = { version = "5", default-features = false, features = ["default-fancy"] }
 
 # Platform integration (cross-platform)
 muda = "0.15"