feat: add native image delivery across channels

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

@@ -339,6 +339,110 @@ test('DingTalk returns a registered result file through the native robot convers
   });
 });
 
+test('DingTalk routes Artifact images natively and preserves the shared fallback boundary', async (t) => {
+  const scenarios = [
+    {
+      name: 'native image',
+      fileName: 'native.png',
+      content: PNG_BYTES,
+      expectedCalls: ['image'],
+      expectedPresentation: 'dingtalk-image',
+      expectedProviderIds: ['dingtalk-native-image'],
+    },
+    {
+      name: 'ordinary file',
+      fileName: 'ordinary.txt',
+      content: 'ordinary file',
+      expectedCalls: ['file'],
+      expectedPresentation: 'dingtalk-file',
+      expectedProviderIds: ['dingtalk-native-file'],
+    },
+    {
+      name: 'definite image rejection falls back',
+      fileName: 'fallback.png',
+      content: PNG_BYTES,
+      imageError: 'artifact-provider-rejected',
+      expectedCalls: ['image', 'file'],
+      expectedPresentation: 'dingtalk-file',
+      expectedProviderIds: ['dingtalk-native-file'],
+    },
+    {
+      name: 'uncertain image never falls back',
+      fileName: 'uncertain.png',
+      content: PNG_BYTES,
+      imageError: 'artifact-delivery-uncertain',
+      expectedCalls: ['image'],
+      expectedPresentation: 'text-fallback',
+      expectedProviderIds: [],
+      expectedOutcome: 'unknown',
+    },
+  ];
+
+  for (const [index, scenario] of scenarios.entries()) {
+    await t.test(scenario.name, async (subtest) => {
+      const artifact = await committedArtifact(subtest, scenario.fileName, scenario.content);
+      const fixture = stateFixture();
+      fixture.sessions.set('p2p:staff-approved', `session-image-route-${index}`);
+      const calls = [];
+      const bridge = new DingtalkHarnessBridge({
+        api: {
+          sendText: async () => { throw new Error('text intentionally unavailable'); },
+          sendImage: async ({ file, target }) => {
+            calls.push('image');
+            assert.equal(file.fileName, scenario.fileName);
+            assert.equal(file.mediaType, 'image/png');
+            assert.deepEqual(target, {
+              type: 'user', userId: 'staff-approved', robotCode: 'robot-code',
+            });
+            if (scenario.imageError) {
+              const error = new Error('private image result');
+              error.code = scenario.imageError;
+              throw error;
+            }
+            return { processQueryKey: 'dingtalk-native-image' };
+          },
+          sendFile: async ({ file, target }) => {
+            calls.push('file');
+            assert.equal(file.fileName, scenario.fileName);
+            assert.deepEqual(target, {
+              type: 'user', userId: 'staff-approved', robotCode: 'robot-code',
+            });
+            return { processQueryKey: 'dingtalk-native-file' };
+          },
+        },
+        clientId: 'ding-client',
+        clientSecret: 'host-secret',
+        harness: {
+          sessionExists: async () => true,
+          ask: async (_sessionId, _text, options) => {
+            await options.onArtifact(artifact);
+            return '';
+          },
+        },
+        state: fixture.state,
+        logger: { warn() {}, error() {} },
+      });
+
+      const receipt = await bridge.accept(message(`dingtalk-image-route-${index}`, '生成产物', {
+        robotCode: 'robot-code',
+      }));
+
+      assert.deepEqual(calls, scenario.expectedCalls);
+      assert.equal(receipt.presentation, scenario.expectedPresentation);
+      assert.deepEqual(receipt.providerMessageIds, scenario.expectedProviderIds);
+      assert.deepEqual(receipt.artifacts, [{
+        artifactId: artifact.artifactId,
+        outcome: scenario.expectedOutcome ?? 'sent',
+        ...(scenario.imageError === 'artifact-delivery-uncertain'
+          ? { reason: 'artifact-delivery-uncertain' }
+          : {}),
+      }]);
+      assert.equal(bridge.status.artifactsSent, scenario.expectedOutcome === 'unknown' ? 0 : 1);
+      assert.equal(bridge.status.artifactSendErrors, scenario.expectedOutcome === 'unknown' ? 1 : 0);
+    });
+  }
+});
+
 test('DingTalk still attempts a registered file when the final text transport fails', async (t) => {
   const artifact = await committedArtifact(t, 'dingtalk-text-failed.pdf', 'dingtalk-file');
   const fixture = stateFixture();