feat: add emblem geometry sliders

src/ui/editor.rs

@@ -51,6 +51,20 @@ pub fn build_editor_page(
     
     // Geometry sliders will go here in Task 4
     let geometry_box = GtkBox::new(Orientation::Vertical, 4);
+    
+    let scale_x = gtk::Scale::with_range(Orientation::Horizontal, -64.0, 64.0, 1.0);
+    scale_x.set_value(32.0);
+    let scale_y = gtk::Scale::with_range(Orientation::Horizontal, -64.0, 64.0, 1.0);
+    scale_y.set_value(32.0);
+    let scale_size = gtk::Scale::with_range(Orientation::Horizontal, 8.0, 128.0, 1.0);
+    scale_size.set_value(32.0);
+    
+    geometry_box.append(&Label::new(Some("Emblem X")));
+    geometry_box.append(&scale_x);
+    geometry_box.append(&Label::new(Some("Emblem Y")));
+    geometry_box.append(&scale_y);
+    geometry_box.append(&Label::new(Some("Emblem Size")));
+    geometry_box.append(&scale_size);
     side_panel.append(&geometry_box);
 
     content.append(&side_panel);
@@ -74,6 +88,31 @@ pub fn build_editor_page(
     };
     refresh_preview();
 
+    {
+        let composite = Rc::clone(&composite);
+        let refresh_preview = refresh_preview.clone();
+        scale_x.connect_value_changed(move |s| {
+            composite.borrow_mut().emblem_x = s.value();
+            refresh_preview();
+        });
+    }
+    {
+        let composite = Rc::clone(&composite);
+        let refresh_preview = refresh_preview.clone();
+        scale_y.connect_value_changed(move |s| {
+            composite.borrow_mut().emblem_y = s.value();
+            refresh_preview();
+        });
+    }
+    {
+        let composite = Rc::clone(&composite);
+        let refresh_preview = refresh_preview.clone();
+        scale_size.connect_value_changed(move |s| {
+            composite.borrow_mut().emblem_size = s.value();
+            refresh_preview();
+        });
+    }
+
     let rebuild_swatches: Rc<RefCell<Box<dyn Fn()>>> = Rc::new(RefCell::new(Box::new(|| {})));
     {
         let composite = Rc::clone(&composite);