fix: bundle and load own font

rustortion-standalone/src/gui/components/dialogs/tuner.rs

@@ -159,7 +159,6 @@ impl TunerDisplay {
 
             column![
                 text(bar_str)
-                    .font(iced::Font::MONOSPACE)
                     .size(24)
                     .style(move |_: &iced::Theme| iced::widget::text::Style { color: Some(color) }),
                 row![
@@ -188,7 +187,6 @@ impl TunerDisplay {
         } else {
             column![
                 text("\u{2502}")
-                    .font(iced::Font::MONOSPACE)
                     .size(24)
                     .style(|_: &iced::Theme| iced::widget::text::Style {
                         color: Some(Color::from_rgb(0.3, 0.3, 0.3)),

rustortion-standalone/src/gui/mod.rs

@@ -6,6 +6,7 @@ pub use app::AmplifierApp;
 pub use rustortion_ui::messages::Message;
 
 use crate::settings::Settings;
+use rustortion_ui::font::{EMBEDDED_FONT, EMBEDDED_FONT_BYTES};
 
 pub fn start(settings: Settings) -> iced::Result {
     iced::application(
@@ -19,6 +20,8 @@ pub fn start(settings: Settings) -> iced::Result {
         min_size: Some(iced::Size::new(800.0, 600.0)),
         ..iced::window::Settings::default()
     })
+    .font(EMBEDDED_FONT_BYTES)
+    .default_font(EMBEDDED_FONT)
     .theme(AmplifierApp::theme)
     .title("Rustortion")
     .run()

rustortion-ui/src/font.rs

@@ -0,0 +1,10 @@
+/// Embedded font bytes (Inter Regular, SIL Open Font License).
+///
+/// Bundling a font guarantees text renders on all systems regardless of which
+/// system fonts are installed. Without this, iced falls back through
+/// cosmic-text's hardcoded list (Noto Sans, DejaVu Sans, ...) and text
+/// silently disappears on systems that lack those fonts.
+pub const EMBEDDED_FONT_BYTES: &[u8] = include_bytes!("../assets/Inter-Regular.ttf");
+
+/// The [`iced::Font`] that references the embedded font by name.
+pub const EMBEDDED_FONT: iced::Font = iced::Font::with_name("Inter");

rustortion-ui/src/lib.rs

@@ -32,6 +32,7 @@
 pub mod app;
 pub mod backend;
 pub mod components;
+pub mod font;
 pub mod handlers;
 pub mod hotkey;
 pub mod i18n;