window: scale sidebar fonts with zoom level

README.md

@@ -13,7 +13,7 @@ It follows the [river of news](http://scripting.com/2014/06/02/whatIsARiverOfNew
 
 - **River of news**: all unread articles in one flat list, auto-marked as read as you flip through them one by one
 - **Offline reading**: article content and images are cached locally so you can read without a connection
-- **Image caching**: images are pre-fetched after each reload; skipped on metered connections unless enabled in preferences
+- **Image caching**: images are pre-fetched after each reload; can be disabled in preferences and is always skipped on metered connections
 - **Offline sync**: read/unread state changes made offline are queued and pushed to the server next time you're online
 - **Persistent state**: the article list, selected article, and scroll position are restored when you reopen the app
 - **Dark mode**: follows the system color scheme automatically

src/app.rs

@@ -70,6 +70,9 @@ mod imp {
                 }
                 .sidebar-content row:selected {
                     background-color: alpha(@window_fg_color, 0.22);
+                }
+                .unread-title {
+                    font-weight: bold;
                 }"
             );
             gtk4::style_context_add_provider_for_display(

src/article_row.rs

@@ -83,8 +83,10 @@ mod imp {
                 let unread = obj.article().unread;
                 if unread {
                     title_label.remove_css_class("dim-label");
+                    title_label.add_css_class("unread-title");
                 } else {
                     title_label.add_css_class("dim-label");
+                    title_label.remove_css_class("unread-title");
                 }
             });
             *self.unread_handler.borrow_mut() = Some((obj.clone(), id));
@@ -102,8 +104,10 @@ mod imp {
         fn update_read_style(&self, unread: bool) {
             if unread {
                 self.title_label.remove_css_class("dim-label");
+                self.title_label.add_css_class("unread-title");
             } else {
                 self.title_label.add_css_class("dim-label");
+                self.title_label.remove_css_class("unread-title");
             }
         }
     }

src/window.rs

@@ -63,6 +63,7 @@ pub mod imp {
         pub current_article_id: RefCell<Option<String>>,
         pub mark_unread_guard: RefCell<bool>,
         pub pending_restore_id: RefCell<Option<String>>,
+        pub sidebar_zoom_css: std::cell::OnceCell<gtk4::CssProvider>,
     }
 
     #[glib::object_subclass]
@@ -140,6 +141,16 @@ pub mod imp {
             let zoom = settings.double("zoom-level");
             self.web_view.set_zoom_level(zoom);
 
+            // Set up sidebar font zoom CSS provider
+            let zoom_css = gtk4::CssProvider::new();
+            gtk4::style_context_add_provider_for_display(
+                &gtk4::gdk::Display::default().unwrap(),
+                &zoom_css,
+                gtk4::STYLE_PROVIDER_PRIORITY_APPLICATION,
+            );
+            self.sidebar_zoom_css.set(zoom_css).ok();
+            self.update_sidebar_zoom(zoom);
+
             // Persist sidebar width while dragging (only when visible)
             let s2 = settings.clone();
             let sidebar_weak = self.sidebar_toolbar.downgrade();
@@ -794,16 +805,26 @@ pub mod imp {
 
         // ── Zoom ──────────────────────────────────────────────────────────────
 
+        fn update_sidebar_zoom(&self, level: f64) {
+            if let Some(css) = self.sidebar_zoom_css.get() {
+                css.load_from_string(&format!(
+                    ".sidebar-content label {{ font-size: {level}em; }}"
+                ));
+            }
+        }
+
         fn zoom(&self, factor: f64) {
             let wv = &*self.web_view;
             let new_level = (wv.zoom_level() * factor).clamp(0.25, 5.0);
             wv.set_zoom_level(new_level);
+            self.update_sidebar_zoom(new_level);
             let settings = gio::Settings::new("net.jeena.FeedTheMonkey");
             settings.set_double("zoom-level", new_level).ok();
         }
 
         fn zoom_reset(&self) {
             self.web_view.set_zoom_level(1.0);
+            self.update_sidebar_zoom(1.0);
             let settings = gio::Settings::new("net.jeena.FeedTheMonkey");
             settings.set_double("zoom-level", 1.0).ok();
         }