fix(ui): honor color settings in prompt themes

src/ui/theme.rs

@@ -11,6 +11,9 @@ use crate::config::Settings;
 /// - "dracula" - Dracula theme
 pub fn get_theme() -> Theme {
     let settings = Settings::get();
+    if !console::colors_enabled_stderr() {
+        return no_color_theme();
+    }
     match settings.color_theme.to_lowercase().as_str() {
         "base16" => Theme::base16(),
         "catppuccin" => Theme::catppuccin(),
@@ -22,3 +25,46 @@ pub fn get_theme() -> Theme {
         }
     }
 }
+
+fn no_color_theme() -> Theme {
+    let mut theme = Theme::new();
+    theme.input_placeholder = Default::default();
+    theme.focused_button = Default::default();
+    theme.blurred_button = Default::default();
+    theme.cursor_style = Default::default();
+    theme.force_style = false;
+    theme.breadcrumb_active = Default::default();
+    theme.breadcrumb_clickable = Default::default();
+    theme.breadcrumb_future = Default::default();
+    theme
+}
+
+#[cfg(test)]
+mod tests {
+    use confique::Layer;
+
+    use crate::config::Settings;
+    use crate::config::settings::SettingsPartial;
+
+    use super::*;
+
+    #[test]
+    fn get_theme_returns_no_color_theme_when_color_is_disabled() {
+        let mut partial = SettingsPartial::empty();
+        partial.color = Some(false);
+        partial.color_theme = Some("base16".to_string());
+        Settings::reset(Some(partial));
+
+        let theme = get_theme();
+        let cursor_color = theme.real_cursor_color(None);
+
+        assert!(theme.title.fg().is_none());
+        assert!(theme.description.fg().is_none());
+        assert!(theme.selected_option.fg().is_none());
+        assert!(theme.unselected_option.fg().is_none());
+        assert!(cursor_color.fg().is_none());
+        assert!(cursor_color.bg().is_none());
+
+        Settings::reset(None);
+    }
+}