window: collapse sidebar when dragged too narrow; keep controls accessible

When the paned divider is dragged left below 120 px, snap the sidebar
closed instead of leaving a sliver. This replaces the previous
minimum-width approach.

When the sidebar is hidden (via toggle or snap-close), show the refresh
button and primary menu in the content header so they remain reachable.
Both stacks are kept in sync (spinner/button) with their sidebar
counterparts during article fetches.

data/ui/window.blp

@@ -11,7 +11,6 @@ template $FeedTheMonkeyWindow : Adw.ApplicationWindow {
       focusable: false;
       shrink-start-child: false;
       resize-start-child: false;
-      shrink-end-child: false;
 
       start-child: Adw.ToolbarView sidebar_toolbar {
         top-bar-style: raised;
@@ -108,7 +107,6 @@ template $FeedTheMonkeyWindow : Adw.ApplicationWindow {
 
       end-child: Adw.ToolbarView {
         top-bar-style: raised;
-        width-request: 360;
 
         [top]
         Adw.HeaderBar {
@@ -119,10 +117,39 @@ template $FeedTheMonkeyWindow : Adw.ApplicationWindow {
             action-name: "win.toggle-sidebar";
           }
 
+          [start]
+          Stack content_refresh_stack {
+            visible: false;
+            StackPage {
+              name: "button";
+              child: Button {
+                icon-name: "view-refresh-symbolic";
+                tooltip-text: _("Refresh");
+                action-name: "win.reload";
+              };
+            }
+            StackPage {
+              name: "spinner";
+              child: Spinner {
+                spinning: true;
+                width-request: 16;
+                height-request: 16;
+              };
+            }
+          }
+
           title-widget: Adw.WindowTitle {
             title: _("FeedTheMonkey");
           };
 
+          [end]
+          MenuButton content_menu_button {
+            icon-name: "open-menu-symbolic";
+            primary: true;
+            menu-model: primary_menu;
+            visible: false;
+          }
+
           [end]
           MenuButton article_menu_button {
             icon-name: "view-more-symbolic";

src/window.rs

@@ -45,6 +45,10 @@ pub mod imp {
         #[template_child]
         pub article_menu_button: TemplateChild<gtk4::MenuButton>,
         #[template_child]
+        pub content_refresh_stack: TemplateChild<gtk4::Stack>,
+        #[template_child]
+        pub content_menu_button: TemplateChild<gtk4::MenuButton>,
+        #[template_child]
         pub sidebar_content: TemplateChild<gtk4::Stack>,
         #[template_child]
         pub article_list_view: TemplateChild<gtk4::ListView>,
@@ -164,12 +168,18 @@ pub mod imp {
             self.sidebar_zoom_css.set(zoom_css).ok();
             self.update_sidebar_zoom(zoom);
 
-            // Persist sidebar width while dragging (only when visible)
+            // Persist sidebar width while dragging; collapse when dragged too narrow.
             let s2 = settings.clone();
-            let sidebar_weak = self.sidebar_toolbar.downgrade();
+            let win_weak = self.obj().downgrade();
             self.paned.connect_notify_local(Some("position"), move |paned, _| {
-                if sidebar_weak.upgrade().map(|s| s.is_visible()).unwrap_or(false) {
+                let Some(win) = win_weak.upgrade() else { return };
-                    s2.set_int("sidebar-width", paned.position()).ok();
+                let imp = win.imp();
+                if !imp.sidebar_toolbar.is_visible() { return; }
+                let pos = paned.position();
+                if pos < 120 {
+                    imp.set_sidebar_visible(false);
+                } else {
+                    s2.set_int("sidebar-width", pos).ok();
                 }
             });
 
@@ -409,11 +419,16 @@ pub mod imp {
         fn setup_sidebar_toggle(&self) {}
 
         fn do_toggle_sidebar(&self) {
-            let sidebar = &*self.sidebar_toolbar;
+            self.set_sidebar_visible(!self.sidebar_toolbar.is_visible());
-            if sidebar.is_visible() {
+        }
-                sidebar.set_visible(false);
+
-            } else {
+        fn set_sidebar_visible(&self, visible: bool) {
-                sidebar.set_visible(true);
+            self.sidebar_toolbar.set_visible(visible);
+            // Mirror refresh stack state and primary menu in the content header
+            // when the sidebar is hidden, so those controls remain accessible.
+            self.content_refresh_stack.set_visible(!visible);
+            self.content_menu_button.set_visible(!visible);
+            if visible {
                 let settings = gio::Settings::new("net.jeena.FeedTheMonkey");
                 let saved = settings.int("sidebar-width");
                 self.paned.set_position(if saved > 0 { saved } else { 280 });
@@ -630,6 +645,7 @@ pub mod imp {
             *self.filter_rules.borrow_mut() = crate::filters::load_rules();
 
             self.refresh_stack.set_visible_child_name("spinner");
+            self.content_refresh_stack.set_visible_child_name("spinner");
 
             // Only show the loading screen if there's nothing to show yet.
             let has_articles = self.article_store.borrow()
@@ -725,6 +741,7 @@ pub mod imp {
                         }
                     }
                     imp.refresh_stack.set_visible_child_name("button");
+                    imp.content_refresh_stack.set_visible_child_name("button");
                 },
             );
         }