fix(channels): handle LINE and Zalo outbound attachment references

src/channels/line/adapter.ts

@@ -169,6 +169,19 @@ export class LineAdapter implements ChannelAdapter {
     } finally {
       await rm(tempDir, { recursive: true, force: true });
     }
+
+    if (message.attachments && message.attachments.length > 0) {
+      for (const attachment of message.attachments) {
+        if (attachment.url) {
+          const line = attachment.filename ? `${attachment.filename}: ${attachment.url}` : attachment.url;
+          await this.sendPush(peerId, line);
+          continue;
+        }
+        if (attachment.data) {
+          console.warn(`LINE: skipping attachment data (${attachment.mimeType}) — upload not implemented`);
+        }
+      }
+    }
   }
 
   async handleRequest(req: IncomingMessage, res: ServerResponse): Promise<void> {

src/channels/zalo/adapter.ts

@@ -159,6 +159,19 @@ export class ZaloAdapter implements ChannelAdapter {
     } finally {
       await rm(tempDir, { recursive: true, force: true });
     }
+
+    if (message.attachments && message.attachments.length > 0) {
+      for (const attachment of message.attachments) {
+        if (attachment.url) {
+          const line = attachment.filename ? `${attachment.filename}: ${attachment.url}` : attachment.url;
+          await this.sendText(peerId, line);
+          continue;
+        }
+        if (attachment.data) {
+          console.warn(`Zalo: skipping attachment data (${attachment.mimeType}) — upload not implemented`);
+        }
+      }
+    }
   }
 
   async handleRequest(req: IncomingMessage, res: ServerResponse): Promise<void> {