feat: unify AI edit workflow

operations/generation/workflow.test.ts

@@ -40,6 +40,22 @@ describe("generation workflow", () => {
     expect(app.store.getState().editor.generation.candidates).toHaveLength(0);
   });
 
+  test("repairs replace prerequisites by adding an aligned editable mask through commands", async () => {
+    const app = createTestApp();
+    const state = app.store.getState();
+    state.document.assets.push({ id: "source-asset", name: "Source", mimeType: "image/png", source: "source", intrinsicSize: { w: 80, h: 60 } });
+    state.document.artboards[0]!.layers.push({ id: "source", type: "raster", name: "Source", visible: true, locked: false, opacity: 1, assetId: "source-asset", transform: { position: { x: 4, y: 8 }, scale: { x: 2, y: 2 }, rotation: 0 } });
+    state.editor.selection = { artboardId: "artboard", layerIds: ["source"] };
+    const ids = ["mask-asset", "mask-layer"];
+    const workflow = createGenerationWorkflow(app.store, dependencies({ createId: () => ids.shift() ?? "unused" }));
+
+    await workflow.prepareInpaintMask();
+
+    const next = app.store.getState();
+    expect(next.document.artboards[0]?.layers[0]).toMatchObject({ id: "mask-layer", transform: { position: { x: 4, y: 8 }, scale: { x: 2, y: 2 }, rotation: 0 } });
+    expect(next.editor.maskEdit).toEqual({ targetLayerId: "source", maskLayerId: "mask-layer" });
+  });
+
   test("cancels the active operation and records a cancelled job", async () => {
     const app = createTestApp();
     let receivedSignal: AbortSignal | undefined;