Bundle Newsreader serif and apply to hero text

Embeds Newsreader (variable opsz/wght, OFL-licensed) into the
ely_app binary via include_bytes!, registers it through GPUI's
text_system at startup (chrome::typography::register_serif_fonts),
and exposes the SERIF_FAMILY constant for downstream surfaces.

Apply the family to every page hero where the design uses
ely-serif: home headline, settings/appearance headline, plugin
marketplace headline, sync headline, plugin detail name, and the
home reading-list cover headline. The OFL license file ships
alongside the .ttf assets to satisfy the font's redistribution
clause.

crates/ely_app/src/shell/chrome/appearance_form.rs

@@ -9,6 +9,7 @@ use gpui::{
 use gpui_component::{IconName, scroll::ScrollableElement};
 
 use crate::shell::ElyShell;
+use crate::shell::chrome::SERIF_FAMILY;
 
 pub(crate) fn render_appearance_form(
     snapshot: &BrowserSnapshot,
@@ -48,6 +49,7 @@ fn render_header() -> AnyElement {
         )
         .child(
             div()
+                .font_family(SERIF_FAMILY)
                 .text_size(px(34.0))
                 .font_weight(FontWeight(400.0))
                 .text_color(rgb(colors::INK))

crates/ely_app/src/shell/chrome/home/hero.rs

@@ -7,6 +7,8 @@ use gpui_component::IconName;
 
 use crate::shell::ElyShell;
 
+use crate::shell::chrome::SERIF_FAMILY;
+
 use super::style::{
     ARROW_CHIP_BG, PILL_BG, PILL_BG_HOVER, SEARCH_BG, card_shadow, soft_shadow,
 };
@@ -42,6 +44,7 @@ fn render_greeting_row(text: String) -> AnyElement {
 
 fn render_serif_headline() -> AnyElement {
     div()
+        .font_family(SERIF_FAMILY)
         .text_size(px(64.0))
         .font_weight(FontWeight(400.0))
         .text_color(rgb(colors::INK))

crates/ely_app/src/shell/chrome/home/recap.rs

@@ -10,7 +10,7 @@ use gpui::{
 };
 
 use crate::shell::ElyShell;
-use crate::shell::chrome::render_glyph_for;
+use crate::shell::chrome::{SERIF_FAMILY, render_glyph_for};
 
 use super::style::{CARD_BG, card_shadow};
 use super::time::relative_time_label;
@@ -217,6 +217,7 @@ fn render_reading_list_cover(
                 .gap_1()
                 .child(
                     div()
+                        .font_family(SERIF_FAMILY)
                         .text_size(px(18.0))
                         .font_weight(FontWeight(500.0))
                         .text_color(rgb(0xffffff))

crates/ely_app/src/shell/chrome/mod.rs

@@ -8,6 +8,7 @@ pub(crate) mod sidebar;
 pub(crate) mod sidebar_header;
 pub(crate) mod split_pane;
 pub(crate) mod topbar;
+pub(crate) mod typography;
 pub(crate) mod wallpaper;
 
 pub(crate) use appearance_form::render_appearance_form;
@@ -22,4 +23,5 @@ pub(crate) use split_pane::{
     render_split_pane_header,
 };
 pub(crate) use topbar::render_topbar;
+pub(crate) use typography::{SERIF_FAMILY, register_serif_fonts};
 pub(crate) use wallpaper::render_wallpaper;

crates/ely_app/src/shell/chrome/typography.rs

@@ -0,0 +1,17 @@
+use std::borrow::Cow;
+
+use gpui::App;
+
+const NEWSREADER_REGULAR: &[u8] =
+    include_bytes!("../../../assets/fonts/Newsreader.ttf");
+const NEWSREADER_ITALIC: &[u8] =
+    include_bytes!("../../../assets/fonts/Newsreader-Italic.ttf");
+
+pub(crate) const SERIF_FAMILY: &str = "Newsreader";
+
+pub(crate) fn register_serif_fonts(cx: &App) -> gpui::Result<()> {
+    cx.text_system().add_fonts(vec![
+        Cow::Borrowed(NEWSREADER_REGULAR),
+        Cow::Borrowed(NEWSREADER_ITALIC),
+    ])
+}