Add workspace panel overlay routing

tests/UI/Editor/unit/test_ui_editor_panel_input_filter.cpp

@@ -95,6 +95,32 @@ TEST(UIEditorPanelInputFilterTests, CapturedPointerEventsBypassBoundsWhenEnabled
     EXPECT_EQ(filtered[1].type, UIInputEventType::PointerButtonDown);
 }
 
+TEST(UIEditorPanelInputFilterTests, ExtraOverlayBoundsAllowPointerEventsOutsidePanelRect) {
+    const std::vector<UIRect> overlayBounds = {
+        UIRect(120.0f, 10.0f, 80.0f, 80.0f)
+    };
+    const std::vector<UIInputEvent> filtered =
+        FilterUIEditorPanelInputEvents(
+            UIRect(0.0f, 0.0f, 100.0f, 100.0f),
+            {
+                MakePointerMove(150.0f, 30.0f),
+                MakePointerButtonDown(160.0f, 35.0f),
+                MakePointerMove(240.0f, 30.0f)
+            },
+            UIEditorPanelInputFilterOptions{
+                .allowPointerInBounds = true,
+                .allowPointerWhileCaptured = false,
+                .allowKeyboardInput = false,
+                .allowFocusEvents = false,
+                .includePointerLeave = false
+            },
+            &overlayBounds);
+
+    ASSERT_EQ(filtered.size(), 2u);
+    EXPECT_EQ(filtered[0].type, UIInputEventType::PointerMove);
+    EXPECT_EQ(filtered[1].type, UIInputEventType::PointerButtonDown);
+}
+
 TEST(UIEditorPanelInputFilterTests, SyntheticFocusTransitionsArePrependedToFilteredEvents) {
     const std::vector<UIInputEvent> filtered =
         BuildUIEditorPanelInputEvents(

tests/UI/Editor/unit/test_ui_editor_workspace_interaction.cpp

@@ -208,6 +208,48 @@ TEST(UIEditorWorkspaceInteractionTest, HostedPanelPointerDownTransfersOwnerAndCl
     EXPECT_TRUE(frame.result.viewportInputFrame.captureEnded);
 }
 
+TEST(UIEditorWorkspaceInteractionTest, OverlayRegionOutsidePanelBoundsResolvesHostedPanelOwner) {
+    auto controller =
+        BuildDefaultUIEditorWorkspaceController(BuildPanelRegistry(), BuildWorkspace());
+    UIEditorWorkspaceInteractionState state = {};
+    UIEditorWorkspaceInteractionModel model = BuildInteractionModel();
+
+    auto frame = UpdateUIEditorWorkspaceInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        {});
+    const auto* viewportFrame =
+        FindUIEditorWorkspaceViewportPresentationFrame(frame.composeFrame, "viewport");
+    ASSERT_NE(viewportFrame, nullptr);
+    const UIPoint viewportCenter =
+        RectCenter(viewportFrame->viewportShellFrame.slotLayout.inputRect);
+
+    model.panelOverlayRegions = {
+        {
+            "details",
+            UIRect(viewportCenter.x - 24.0f, viewportCenter.y - 24.0f, 48.0f, 48.0f),
+            true
+        }
+    };
+    frame = UpdateUIEditorWorkspaceInteraction(
+        state,
+        controller,
+        UIRect(0.0f, 0.0f, 1280.0f, 720.0f),
+        model,
+        {
+            MakePointerEvent(
+                UIInputEventType::PointerButtonDown,
+                viewportCenter.x,
+                viewportCenter.y,
+                UIPointerButton::Left)
+        });
+
+    EXPECT_TRUE(frame.inputOwnerChanged);
+    EXPECT_TRUE(IsUIEditorWorkspaceHostedPanelInputOwner(frame.inputOwner, "details"));
+}
+
 TEST(UIEditorWorkspaceInteractionTest, PointerUpInsideViewportBubblesPointerReleaseRequest) {
     auto controller =
         BuildDefaultUIEditorWorkspaceController(BuildPanelRegistry(), BuildWorkspace());