test(dingtalk): cover PR #76 mentions and credit contributor

Add regression coverage for group mention chunks, private replies, mention payloads, and batch reply failure handling. Credit divingleee in package contributors and rebuild the checked-in bundles.

test/channels/dingtalk/dingtalk-api.test.mjs

@@ -117,6 +117,42 @@ test('session replies use the fixed token endpoint, reject redirects, and cache
   });
 });
 
+test('session text replies include populated mention targets and omit empty mentions', async () => {
+  const sent = [];
+  const api = createDingtalkApi({
+    fetchImpl: async (url, options) => {
+      if (url.toString().includes('/oauth2/accessToken')) {
+        return jsonResponse({ accessToken: 'access-token', expireIn: 7_200 });
+      }
+      sent.push(JSON.parse(options.body));
+      return jsonResponse({ errcode: 0 });
+    },
+  });
+  for (const at of [
+    { atUserIds: ['staff-one'] },
+    { atMobiles: ['13800000000'] },
+    { isAtAll: true },
+    {},
+    { atUserIds: [], atMobiles: [], isAtAll: false },
+  ]) {
+    await api.sendText({
+      clientId: 'ding-client',
+      clientSecret: 'host-only-secret',
+      sessionWebhook: 'https://oapi.dingtalk.com/robot/reply?ticket=mentions',
+      text: '回答',
+      at,
+    });
+  }
+  assert.deepEqual(sent.map((body) => body.at), [
+    { atUserIds: ['staff-one'] },
+    { atMobiles: ['13800000000'] },
+    { isAtAll: true },
+    undefined,
+    undefined,
+  ]);
+  for (const body of sent) assert.equal(body.text.content, '回答');
+});
+
 test('DingTalk adds, recalls, and replaces its native status reactions', async () => {
   const calls = [];
   const fetchImpl = async (url, options) => {

test/channels/dingtalk/dingtalk-bridge.test.mjs

@@ -2425,6 +2425,67 @@ test('DingTalk clears a private batch after turn-stopped without suggesting a ba
   assert.match(sent.at(-1), /当前没有待提交的批量内容/);
 });
 
+test('DingTalk mentions the sender in every group text chunk but not in private replies', async (t) => {
+  for (const conversationType of ['1', '2', 2]) {
+    await t.test(`conversationType=${JSON.stringify(conversationType)}`, async () => {
+      const sent = [];
+      const bridge = new DingtalkHarnessBridge({
+        api: { sendText: async (request) => sent.push(request) },
+        clientId: 'ding-client',
+        clientSecret: 'host-secret',
+        harness: { ensureRunning: async () => true },
+        state: stateFixture().state,
+        maxMessageChars: 10,
+      });
+
+      await bridge.accept(message('mention-status', '/status', {
+        conversationType,
+        isInAtList: true,
+      }));
+
+      assert.ok(sent.length > 1);
+      assert.equal(sent.map(({ text }) => text).join(''), '钉钉机器人与 DeepSeek Harness 连接正常。');
+      for (const request of sent) {
+        assert.deepEqual(request.at, String(conversationType) === '2'
+          ? { atUserIds: ['staff-approved'] }
+          : undefined);
+      }
+    });
+  }
+});
+
+test('DingTalk batch reply failures attempt a safe fallback and settle even if it also fails', async (t) => {
+  for (const conversationType of ['1', '2']) {
+    for (const fallbackFails of [false, true]) {
+      await t.test(`conversationType=${conversationType}, fallbackFails=${fallbackFails}`, async () => {
+        const sent = [];
+        const bridge = new DingtalkHarnessBridge({
+          api: {
+            sendText: async (request) => {
+              sent.push(request);
+              if (sent.length === 1 || fallbackFails) throw new Error('private delivery failure');
+            },
+          },
+          clientId: 'ding-client',
+          clientSecret: 'host-secret',
+          harness: { ask: async () => assert.fail('batch acknowledgement must not call Harness') },
+          state: stateFixture().state,
+          logger: { error() {} },
+        });
+
+        await assert.doesNotReject(bridge.accept(message('batch-reply-failure', '/batch', {
+          conversationType,
+          isInAtList: true,
+        })));
+
+        assert.equal(sent.length, 2);
+        assert.match(sent[1].text, /参考号：MF-[A-F0-9]{8}/);
+        assert.doesNotMatch(sent[1].text, /private delivery failure|ReferenceError/);
+      });
+    }
+  }
+});
+
 test('DingTalk group batch commands are rejected without reaching Harness', async () => {
   const fixture = stateFixture();
   const sent = [];