fix: harden list mode and batch generation flow

web/test/canvas-batch-table.test.ts

@@ -85,7 +85,7 @@ describe("batch creation table", () => {
 
         expect(withoutText).not.toContain("repeat(0,");
         expect(withoutText).toContain("68px");
-        expect(withoutText).toContain("repeat(3, 88px)");
+        expect(withoutText).toContain("repeat(3, 72px)");
         expect(withText).toContain("repeat(1, minmax(168px, 0.75fr))");
     });
 

web/test/list-mode-generator.test.ts

@@ -0,0 +1,31 @@
+import { describe, expect, test } from "bun:test";
+
+import { parseListModeJson } from "@/pages/canvas/list-mode-generator";
+
+describe("list mode response parsing", () => {
+    test("parses plain JSON", () => {
+        expect(parseListModeJson('{"columns":["卖点"],"rows":[{"卖点":"轻便"}]}')).toEqual({
+            columns: ["卖点"],
+            rows: [{ 卖点: "轻便" }],
+        });
+    });
+
+    test("parses markdown JSON with surrounding explanation", () => {
+        expect(parseListModeJson('结果如下：\n```json\n{"columns":["标题"],"rows":[{"标题":"新品"}]}\n```\n')).toEqual({
+            columns: ["标题"],
+            rows: [{ 标题: "新品" }],
+        });
+    });
+
+    test("normalizes duplicate columns and non-string cells", () => {
+        expect(parseListModeJson('{"columns":["卖点","卖点","细节"],"rows":[{"卖点":["轻","薄"],"细节":123}]}')).toEqual({
+            columns: ["卖点", "细节"],
+            rows: [{ 卖点: "轻、薄", 细节: "123" }],
+        });
+    });
+
+    test("rejects malformed responses", () => {
+        expect(parseListModeJson("模型暂时无法分析")).toBeNull();
+        expect(parseListModeJson('{"columns":[],"rows":[]}')).toBeNull();
+    });
+});