fix: keep approval batching internal

test/unified.test.ts

@@ -209,7 +209,7 @@ test("selectionId processes exactly the confirmed live result set and rejects dr
   assert.equal(writes, 2);
 });
 
-test("todo lists explicitly describe the fixed 20-item batch policy", async () => {
+test("todo lists keep transport batch policy internal", async () => {
   const user = { userId: "user-1" };
   const manyDing = {
     async listMyTodos() {
@@ -219,21 +219,23 @@ test("todo lists explicitly describe the fixed 20-item batch policy", async () =
     },
   } as unknown as ApprovalService;
   const overflow = await new UnifiedApprovalService({ ...config(), batchLimit: 99 }, manyDing).listTodos(user, "dingtalk", 30);
-  assert.deepEqual(overflow.batchPolicy, {
-    maxItemsPerCall: 20,
-    selectionAvailable: false,
-    selectionUnavailableReason: "result_exceeds_batch_limit",
-    overflowGuidance: "一次最多处理 20 条。超过时可从同一次列表结果中选取 approvalId 分组提交；每组仍须经用户明确授权。",
-  });
+  assert.equal(overflow.returned, 21);
   assert.equal("selectionId" in overflow, false);
+  assert.equal("selectionUnavailableReason" in overflow, false);
+  assert.equal("selectionHint" in overflow, false);
+  assert.equal("batchPolicy" in overflow, false);
 
   const emptyDing = { async listMyTodos() { return { items: [] }; } } as unknown as ApprovalService;
   const empty = await new UnifiedApprovalService(config(), emptyDing).listTodos(user, "dingtalk", 10);
-  assert.equal(empty.batchPolicy.selectionUnavailableReason, "empty_result");
+  assert.equal("selectionId" in empty, false);
+  assert.equal("selectionUnavailableReason" in empty, false);
+  assert.equal("batchPolicy" in empty, false);
 
   const xftUnavailable = { async listMyTodos() { throw new Error("XFT unavailable"); } };
   const partial = await new UnifiedApprovalService(config(), manyDing, xftUnavailable as never).listTodos(user, "all", 1);
-  assert.equal(partial.batchPolicy.selectionUnavailableReason, "requested_source_unhealthy");
+  assert.equal("selectionId" in partial, false);
+  assert.equal("selectionUnavailableReason" in partial, false);
+  assert.equal("batchPolicy" in partial, false);
 });
 
 test("combined todo lists are deterministic regardless of source response timing", async () => {