Fix structured IPC envelope leakage

Normalize EJClaw structured send_message envelopes, preserve attachments, unwrap stored room payloads, and add regression tests.

runners/agent-runner/src/ipc-message.ts

@@ -1,3 +1,8 @@
+import {
+  normalizeEjclawStructuredOutput,
+  type RunnerOutputAttachment,
+} from 'ejclaw-runners-shared';
+
 export interface SendMessageIpcPayloadInput {
   chatJid: string;
   text: string;
@@ -8,17 +13,36 @@ export interface SendMessageIpcPayloadInput {
   timestamp?: string;
 }
 
+export interface SendMessageIpcPayload {
+  type: 'message';
+  chatJid: string;
+  text: string;
+  sender?: string;
+  senderRole?: string;
+  runId?: string;
+  groupFolder: string;
+  timestamp: string;
+  attachments?: RunnerOutputAttachment[];
+}
+
 export function buildSendMessageIpcPayload(
   input: SendMessageIpcPayloadInput,
-): Record<string, string | undefined> {
+): SendMessageIpcPayload {
+  const normalized = normalizeEjclawStructuredOutput(input.text);
+  const output =
+    normalized.output?.visibility === 'public' ? normalized.output : null;
+  const text = output?.text ?? normalized.result ?? '';
+  const attachments = output?.attachments ?? [];
+
   return {
     type: 'message',
     chatJid: input.chatJid,
-    text: input.text,
+    text,
     sender: input.sender || undefined,
     senderRole: input.senderRole || undefined,
     runId: input.runId || undefined,
     groupFolder: input.groupFolder,
     timestamp: input.timestamp || new Date().toISOString(),
+    ...(attachments.length > 0 ? { attachments } : {}),
   };
 }