add auth navbar button

src/app/browser/window/tab/item/page/navigation/auth.rs

@@ -0,0 +1,30 @@
+mod widget;
+
+use widget::Widget;
+
+use crate::app::browser::window::Action;
+use std::rc::Rc;
+
+pub struct Auth {
+    widget: Rc<Widget>,
+}
+
+impl Auth {
+    // Construct
+    pub fn new(action: Rc<Action>) -> Self {
+        Self {
+            widget: Rc::new(Widget::new(action.clone())),
+        }
+    }
+
+    // Actions
+    pub fn update(&self) {
+        // @TODO
+    }
+
+    // Getters
+
+    pub fn widget(&self) -> &Rc<Widget> {
+        &self.widget
+    }
+}

src/app/browser/window/tab/item/page/navigation/auth/widget.rs

@@ -0,0 +1,38 @@
+use crate::app::browser::window::Action;
+use gtk::{
+    prelude::{ButtonExt, WidgetExt},
+    Button,
+};
+use std::rc::Rc;
+
+pub struct Widget {
+    gobject: Button,
+}
+
+impl Widget {
+    // Construct
+    pub fn new(action: Rc<Action>) -> Self {
+        // Init gobject
+        let gobject = Button::builder()
+            .icon_name("avatar-default-symbolic")
+            .tooltip_text("Auth")
+            .sensitive(false)
+            .build();
+
+        // Init events @TODO
+        // gobject.connect_clicked(move |_| action.auth().activate());
+
+        // Return activated `Self`
+        Self { gobject }
+    }
+
+    // Actions
+    pub fn update(&self, is_sensitive: bool) {
+        self.gobject.set_sensitive(is_sensitive);
+    }
+
+    // Getters
+    pub fn gobject(&self) -> &Button {
+        &self.gobject
+    }
+}

src/app/browser/window/tab/item/page/navigation/widget.rs

@@ -13,6 +13,7 @@ pub struct Widget {
 impl Widget {
     // Construct
     pub fn new(
+        auth: &impl IsA<gtk::Widget>,
         base: &impl IsA<gtk::Widget>,
         history: &impl IsA<gtk::Widget>,
         reload: &impl IsA<gtk::Widget>,
@@ -32,6 +33,7 @@ impl Widget {
         gobject.append(reload);
         gobject.append(request);
         gobject.append(bookmark);
+        gobject.append(auth);
 
         Self { gobject }
     }