feat(input): select image layers on canvas

input/selection.test.ts

@@ -35,6 +35,54 @@ describe("selection input", () => {
     expect(dispatched).toEqual([{ commandId: commandIds.selectionSet, payload: { artboardId: "a1", layerIds: [] } }]);
   });
 
+  test("selects topmost image layer before artboard", () => {
+    const state = {
+      ...createInitialAppState("Test"),
+      document: {
+        ...createInitialAppState("Test").document,
+        assets: [{ id: "asset-1", name: "Image", mimeType: "image/png", source: "blob:test", intrinsicSize: { w: 50, h: 50 } }],
+        artboards: [
+          {
+            id: "a1",
+            name: "Artboard",
+            bounds: { x: -100, y: -100, w: 200, h: 200 },
+            backgroundColor: "transparent",
+            layers: [
+              {
+                id: "l1",
+                type: "image",
+                name: "Image",
+                visible: true,
+                locked: false,
+                opacity: 1,
+                assetId: "asset-1",
+                transform: { position: { x: -25, y: -25 }, scale: { x: 1, y: 1 }, rotation: 0 },
+              },
+            ],
+          },
+        ],
+      },
+      editor: {
+        ...createInitialAppState("Test").editor,
+        viewport: { center: { x: 0, y: 0 }, zoom: 1, rotation: 0, size: { w: 200, h: 200 } },
+      },
+    };
+    const dispatched: unknown[] = [];
+
+    const consumed = handleArtboardSelection({
+      event: pointerEvent({ position: { x: 100, y: 100 }, buttons: 1 }),
+      document: state.document,
+      viewport: state.editor.viewport,
+      dispatch: (commandId, payload) => {
+        dispatched.push({ commandId, payload });
+        return ignoredState;
+      },
+    });
+
+    expect(consumed).toBe(true);
+    expect(dispatched).toEqual([{ commandId: commandIds.selectionSet, payload: { artboardId: "a1", layerIds: ["l1"] } }]);
+  });
+
   test("clears selection when clicking outside artboards", () => {
     const state = createInitialAppState("Test");
     const dispatched: unknown[] = [];