feat: add shared child batch creation

tools/operation-plans.test.mjs

@@ -214,6 +214,71 @@ test('shared-child leader lookup survives the strict execution gate', () => {
   assert.deepEqual(validateStandardOperation(operation), []);
 });
 
+test('shared-child batch dispatch is Program-only, resolves all parents, and enters the guarded batch adapter', () => {
+  const parsed = {
+    action: 'shared_child_order_batch_create',
+    order_nature: 'formal',
+    submit_mode: 'dry_run',
+    data: {
+      customer: { name: '合成客户', keyword: '合成客户' },
+      product: { name: '老挝行程--广东', keyword: '老挝行程--广东' },
+      leader: { name: '张三', keyword: '张三' },
+      recurrence: { start_date: '2026-10-06', end_date: '2026-11-03' },
+      passenger_counts: { adult: 20, leader: 1 }
+    }
+  };
+  const dispatch = plans.validateDispatchOperation(parsed);
+  assert.equal(dispatch.ok, true, dispatch.blockers.join('; '));
+  assert.equal(dispatch.execution, 'browser_live_split_child_batch');
+  assert.equal(dispatch.requiresErpResolution, true);
+  assert.equal(plans.validateOperation(parsed).ok, false, 'execution gate requires ERP-resolved batch targets');
+
+  const resolved = {
+    ...parsed,
+    data: {
+      ...parsed.data,
+      batch_targets: [
+        { parent_group_no: 'LW-261006-A', tid: '61006', departure_date: '2026-10-06' },
+        { parent_group_no: 'LW-261103-A', tid: '61103', departure_date: '2026-11-03' }
+      ],
+      resolution: {
+        stage: 'erp_readonly', target: 'batch', candidate_count: 2,
+        target_kind: 'shared_plan', write_attempted: false
+      }
+    }
+  };
+  const execution = plans.validateOperation(resolved);
+  assert.equal(execution.ok, true, execution.blockers.join('; '));
+  assert.equal(execution.execution, 'browser_live_split_child_batch');
+  assert.equal(execution.noErpWrite, false);
+  assert.deepEqual(validateStandardOperation(resolved), []);
+});
+
+test('shared-child batch execution rejects duplicate or out-of-range resolved parents', () => {
+  const operation = {
+    action: 'shared_child_order_batch_create',
+    order_nature: 'formal',
+    submit_mode: 'dry_run',
+    data: {
+      customer: { name: '合成客户' },
+      product: { name: '合成产品' },
+      recurrence: { start_date: '2026-10-06', end_date: '2026-11-03' },
+      passenger_counts: { adult: 20, leader: 1 },
+      batch_targets: [
+        { parent_group_no: 'LW-261006-A', tid: '61006', departure_date: '2026-10-06' },
+        { parent_group_no: 'LW-261006-A', tid: '61006', departure_date: '2026-11-04' }
+      ],
+      resolution: {
+        stage: 'erp_readonly', target: 'batch', candidate_count: 2,
+        target_kind: 'shared_plan', write_attempted: false
+      }
+    }
+  };
+  const result = plans.validateOperation(operation);
+  assert.equal(result.ok, false);
+  assert.match(result.blockers.join('\n'), /重复母团目标|不在请求日期范围/);
+});
+
 test('blocks a marked split-child parent when the child remark loses the test marker', () => {
   const result = plans.validateOperation({
     action: 'shared_child_order_create',