Ensure font features are applied to styled text (#44219)

- Replace `gpui::styled::Styled.font_family()` calls with
`gpui::styled::Styled.font()` when laying out inline diagnostics and
inline blame, to ensure that the font's features are also used, and
not just the font feature.
- Update both `editor::hover_popover::hover_markdown_style` and
`editor::hover_popover::diagnostics_markdown_style` to ensure that
both the UI and Buffer font features are used in both markdown and
diagnostics popover.

Closes #44209 

Release Notes:

- Fixed font feature application for inline git blame, inline
diagnostics, markdown popovers and diagnostics popovers

crates/editor/src/element.rs

@@ -2340,7 +2340,7 @@ impl EditorElement {
                     .opacity(0.05))
                 .text_color(severity_to_color(&diagnostic_to_render.severity).color(cx))
                 .text_sm()
-                .font_family(style.text.font().family)
+                .font(style.text.font())
                 .child(diagnostic_to_render.message.clone())
                 .into_any();
 

crates/editor/src/hover_popover.rs

@@ -607,13 +607,16 @@ async fn parse_blocks(
 pub fn hover_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
     let settings = ThemeSettings::get_global(cx);
     let ui_font_family = settings.ui_font.family.clone();
+    let ui_font_features = settings.ui_font.features.clone();
     let ui_font_fallbacks = settings.ui_font.fallbacks.clone();
     let buffer_font_family = settings.buffer_font.family.clone();
+    let buffer_font_features = settings.buffer_font.features.clone();
     let buffer_font_fallbacks = settings.buffer_font.fallbacks.clone();
 
     let mut base_text_style = window.text_style();
     base_text_style.refine(&TextStyleRefinement {
         font_family: Some(ui_font_family),
+        font_features: Some(ui_font_features),
         font_fallbacks: ui_font_fallbacks,
         color: Some(cx.theme().colors().editor_foreground),
         ..Default::default()
@@ -624,6 +627,7 @@ pub fn hover_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
         inline_code: TextStyleRefinement {
             background_color: Some(cx.theme().colors().background),
             font_family: Some(buffer_font_family),
+            font_features: Some(buffer_font_features),
             font_fallbacks: buffer_font_fallbacks,
             ..Default::default()
         },
@@ -657,12 +661,15 @@ pub fn diagnostics_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
     let settings = ThemeSettings::get_global(cx);
     let ui_font_family = settings.ui_font.family.clone();
     let ui_font_fallbacks = settings.ui_font.fallbacks.clone();
+    let ui_font_features = settings.ui_font.features.clone();
     let buffer_font_family = settings.buffer_font.family.clone();
+    let buffer_font_features = settings.buffer_font.features.clone();
     let buffer_font_fallbacks = settings.buffer_font.fallbacks.clone();
 
     let mut base_text_style = window.text_style();
     base_text_style.refine(&TextStyleRefinement {
         font_family: Some(ui_font_family),
+        font_features: Some(ui_font_features),
         font_fallbacks: ui_font_fallbacks,
         color: Some(cx.theme().colors().editor_foreground),
         ..Default::default()
@@ -673,6 +680,7 @@ pub fn diagnostics_markdown_style(window: &Window, cx: &App) -> MarkdownStyle {
         inline_code: TextStyleRefinement {
             background_color: Some(cx.theme().colors().editor_background.opacity(0.5)),
             font_family: Some(buffer_font_family),
+            font_features: Some(buffer_font_features),
             font_fallbacks: buffer_font_fallbacks,
             ..Default::default()
         },

crates/git_ui/src/blame_ui.rs

@@ -148,7 +148,7 @@ impl BlameRenderer for GitBlameRenderer {
             h_flex()
                 .id("inline-blame")
                 .w_full()
-                .font_family(style.font().family)
+                .font(style.font())
                 .text_color(cx.theme().status().hint)
                 .line_height(style.line_height)
                 .child(Icon::new(IconName::FileGit).color(Color::Hint))