feat(canvas): AI 拆图 - 完善规划、图层编辑与素材复用

web/test/canvas-image-layer-task-state.test.ts

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+import { expect, test } from "bun:test";
+import { canvasTaskBindingStatus } from "@/lib/canvas/canvas-task-state";
+import { CanvasNodeType, type CanvasNodeData } from "@/types/canvas";
+const node: CanvasNodeData = {
+    id: "layer",
+    type: CanvasNodeType.Image,
+    position: { x: 0, y: 0 },
+    width: 20,
+    height: 20,
+    metadata: { taskId: "extract", content: "/opaque.png", status: "idle", layerExtraction: { sourceNodeId: "source", groupId: "group", index: 1, phase: "background-removal-required", extractionTaskId: "extract" } },
+};
+test("待去背景的原始提取成功仅为中间结果", () => {
+    expect(canvasTaskBindingStatus(node, { id: "extract", status: "succeeded" })).toBe("idle");
+});
+test("去背景任务上游成功而未验收时，旧图不能充当新结果", () => {
+    const candidate = { ...node, metadata: { ...node.metadata, taskId: "remove", layerExtraction: { ...node.metadata!.layerExtraction!, phase: "remove-background" as const } } };
+    expect(canvasTaskBindingStatus(candidate, { id: "remove", status: "succeeded" })).toBe("loading");
+});
+test("被本地透明度验收拒绝的成功任务不能抹掉失败状态", () => {
+    const candidate = { ...node, metadata: { ...node.metadata, status: "error" as const, layerExtraction: { ...node.metadata!.layerExtraction!, rejectedTaskId: "remove" } } };
+    expect(canvasTaskBindingStatus(candidate, { id: "remove", status: "succeeded" })).toBe("error");
+});
+test("验收完成须与同一任务绑定，普通节点维持已有规则", () => {
+    const validated = { ...node, metadata: { ...node.metadata, taskId: "remove", layerExtraction: { ...node.metadata!.layerExtraction!, phase: "complete" as const } } };
+    expect(canvasTaskBindingStatus(validated, { id: "remove", status: "succeeded" })).toBe("success");
+    expect(canvasTaskBindingStatus(validated, { id: "older", status: "succeeded" })).toBe("loading");
+    expect(canvasTaskBindingStatus({ ...node, metadata: { content: "/ordinary.png" } }, { id: "ordinary", status: "succeeded" })).toBe("success");
+    expect(canvasTaskBindingStatus(validated, { id: "remove", status: "failed" })).toBe("error");
+});