fix(statusbar): open the layout context menu at the clicked tab

The right-click menu was pinned to the screen's bottom-left corner.
Each layout tab now records its screen bounds through a PosReport
wrapper (which learned runtime-built ids for the dynamic tab names),
and the menu anchors next to the clicked tab via the shared
status-bar popup positioning, falling back to the left edge only when
no bounds were recorded (#428).

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

src/app/view/mod.rs

@@ -1505,7 +1505,7 @@ impl OpenCADStudio {
             .unwrap_or_else(|| iced::widget::Space::new().width(0).height(0).into());
 
         let layout_ctx_layer: Element<'_, Message> = if let Some(name) = &self.layout_context_menu {
-            layout_context_menu_overlay(name)
+            layout_context_menu_overlay(name, win)
         } else {
             iced::widget::Space::new().width(0).height(0).into()
         };

src/app/view/overlay.rs

@@ -935,7 +935,7 @@ pub(super) fn viewport_context_menu_overlay(
 
 /// A small right-click context menu rendered above the status bar.
 /// The `name` is the layout tab that was right-clicked.
-pub(super) fn layout_context_menu_overlay(name: &str) -> Element<'_, Message> {
+pub(super) fn layout_context_menu_overlay(name: &str, win: (f32, f32)) -> Element<'_, Message> {
     const MENU_BG: Color = Color {
         r: 0.17,
         g: 0.17,
@@ -1009,16 +1009,12 @@ pub(super) fn layout_context_menu_overlay(name: &str) -> Element<'_, Message> {
     .on_press(Message::LayoutContextMenuClose)
     .on_right_press(Message::LayoutContextMenuClose);
 
-    // Position the menu above the status bar at the left.
-    let positioned = container(menu)
-        .align_bottom(Fill)
-        .align_left(Fill)
-        .padding(iced::Padding {
-            top: 0.0,
-            right: 0.0,
-            bottom: 30.0,
-            left: 8.0,
-        });
+    // Anchor the menu above the status bar next to the right-clicked tab —
+    // its bounds were recorded by the tab's PosReport wrapper (#428). A
+    // missing report (shouldn't happen) falls back to the left edge.
+    let pill = crate::ui::wrap_bar::dropdown_bounds(&format!("SB_LAYOUT_TAB:{name}"));
+    let positioned =
+        crate::ui::popup::position_statusbar_popup(menu.into(), pill, win, 160.0, false);
 
     stack![catcher, positioned].into()
 }

src/ui/statusbar/mod.rs

@@ -742,10 +742,16 @@ fn space_tab<'a>(
         let ctx_msg = Message::LayoutContextMenu(label.clone());
 
         // Use mouse_area so we can capture right-click for the context menu.
-        mouse_area(display)
-            .on_press(switch_msg)
-            .on_right_press(ctx_msg)
-            .into()
+        // PosReport records the tab's screen bounds so the context menu can
+        // anchor next to the clicked tab instead of the screen's left edge
+        // (#428).
+        crate::ui::wrap_bar::PosReport::owned(
+            format!("SB_LAYOUT_TAB:{label}"),
+            mouse_area(display)
+                .on_press(switch_msg)
+                .on_right_press(ctx_msg),
+        )
+        .into()
     }
 }
 

src/ui/wrap_bar.rs

@@ -31,7 +31,7 @@ thread_local! {
     /// Screen bounds of every ribbon dropdown button, keyed by dropdown id, so
     /// an open dropdown's overlay can anchor directly below its widget at any
     /// size. Written by `PosReport` on draw, read by `dropdown_bounds`.
-    static DD_BOUNDS: RefCell<FxHashMap<&'static str, Rectangle>> =
+    static DD_BOUNDS: RefCell<FxHashMap<String, Rectangle>> =
         RefCell::new(FxHashMap::default());
 }
 
@@ -871,14 +871,22 @@ impl<'a> From<DensitySwap<'a>> for Element<'a, Message> {
 /// A transparent wrapper that records its child's screen bounds under `id` on
 /// every draw, so an open dropdown can anchor its overlay just below the widget.
 pub struct PosReport<'a> {
-    id: &'static str,
+    id: std::borrow::Cow<'static, str>,
     child: Element<'a, Message>,
 }
 
 impl<'a> PosReport<'a> {
     pub fn new(id: &'static str, child: impl Into<Element<'a, Message>>) -> Self {
         Self {
-            id,
+            id: std::borrow::Cow::Borrowed(id),
+            child: child.into(),
+        }
+    }
+
+    /// Report under a runtime-built id (e.g. one per layout tab).
+    pub fn owned(id: String, child: impl Into<Element<'a, Message>>) -> Self {
+        Self {
+            id: std::borrow::Cow::Owned(id),
             child: child.into(),
         }
     }
@@ -971,7 +979,7 @@ impl<'a> Widget<Message, Theme, Renderer> for PosReport<'a> {
         viewport: &Rectangle,
     ) {
         DD_BOUNDS.with(|m| {
-            m.borrow_mut().insert(self.id, layout.bounds());
+            m.borrow_mut().insert(self.id.to_string(), layout.bounds());
         });
         self.child.as_widget().draw(
             &tree.children[0],