fix(routing): preserve explicit cron account and bound message defaults

Co-authored-by: lbo728 <72309817+lbo728@users.noreply.github.com>
Co-authored-by: stakeswky <64798754+stakeswky@users.noreply.github.com>

src/cron/isolated-agent/delivery-target.test.ts

@@ -299,4 +299,39 @@ describe("resolveDeliveryTarget", () => {
     expect(result.to).toBe("987654");
     expect(result.ok).toBe(true);
   });
+
+  it("explicit delivery.accountId overrides session-derived accountId", async () => {
+    setMainSessionEntry({
+      sessionId: "sess-5",
+      updatedAt: 1000,
+      lastChannel: "telegram",
+      lastTo: "chat-999",
+      lastAccountId: "default",
+    });
+
+    const result = await resolveDeliveryTarget(makeCfg({ bindings: [] }), AGENT_ID, {
+      channel: "telegram",
+      to: "chat-999",
+      accountId: "bot-b",
+    });
+
+    expect(result.ok).toBe(true);
+    expect(result.accountId).toBe("bot-b");
+  });
+
+  it("explicit delivery.accountId overrides bindings-derived accountId", async () => {
+    setMainSessionEntry(undefined);
+    const cfg = makeCfg({
+      bindings: [{ agentId: AGENT_ID, match: { channel: "telegram", accountId: "bound" } }],
+    });
+
+    const result = await resolveDeliveryTarget(cfg, AGENT_ID, {
+      channel: "telegram",
+      to: "chat-777",
+      accountId: "explicit",
+    });
+
+    expect(result.ok).toBe(true);
+    expect(result.accountId).toBe("explicit");
+  });
 });

src/cron/isolated-agent/delivery-target.ts

@@ -43,6 +43,7 @@ export async function resolveDeliveryTarget(
     channel?: "last" | ChannelId;
     to?: string;
     sessionKey?: string;
+    accountId?: string;
   },
 ): Promise<DeliveryTargetResolution> {
   const requestedChannel = typeof jobPayload.channel === "string" ? jobPayload.channel : "last";
@@ -114,6 +115,11 @@ export async function resolveDeliveryTarget(
     }
   }
 
+  // Explicit delivery account should override inferred session/binding account.
+  if (jobPayload.accountId) {
+    accountId = jobPayload.accountId;
+  }
+
   // Carry threadId when it was explicitly set (from :topic: parsing or config)
   // or when delivering to the same recipient as the session's last conversation.
   // Session-derived threadIds are dropped when the target differs to prevent

src/cron/isolated-agent/run.ts

@@ -314,6 +314,7 @@ export async function runCronIsolatedAgentTurn(params: {
     channel: deliveryPlan.channel ?? "last",
     to: deliveryPlan.to,
     sessionKey: params.job.sessionKey,
+    accountId: deliveryPlan.accountId,
   });
 
   const { formattedTime, timeLine } = resolveCronStyleNow(params.cfg, now);