fix(heartbeat): scope exec wake dispatch to session key (#32724)

Merged via squash.

Prepared head SHA: 563fee0e65af07575f3df540cab2e1e5d5589f06
Co-authored-by: altaywtf <9790196+altaywtf@users.noreply.github.com>
Co-authored-by: altaywtf <9790196+altaywtf@users.noreply.github.com>
Reviewed-by: @altaywtf

src/agents/bash-tools.exec-runtime.test.ts

@@ -0,0 +1,64 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+vi.mock("../infra/heartbeat-wake.js", () => ({
+  requestHeartbeatNow: vi.fn(),
+}));
+
+vi.mock("../infra/system-events.js", () => ({
+  enqueueSystemEvent: vi.fn(),
+}));
+
+import { requestHeartbeatNow } from "../infra/heartbeat-wake.js";
+import { enqueueSystemEvent } from "../infra/system-events.js";
+import { emitExecSystemEvent } from "./bash-tools.exec-runtime.js";
+
+const requestHeartbeatNowMock = vi.mocked(requestHeartbeatNow);
+const enqueueSystemEventMock = vi.mocked(enqueueSystemEvent);
+
+describe("emitExecSystemEvent", () => {
+  beforeEach(() => {
+    requestHeartbeatNowMock.mockClear();
+    enqueueSystemEventMock.mockClear();
+  });
+
+  it("scopes heartbeat wake to the event session key", () => {
+    emitExecSystemEvent("Exec finished", {
+      sessionKey: "agent:ops:main",
+      contextKey: "exec:run-1",
+    });
+
+    expect(enqueueSystemEventMock).toHaveBeenCalledWith("Exec finished", {
+      sessionKey: "agent:ops:main",
+      contextKey: "exec:run-1",
+    });
+    expect(requestHeartbeatNowMock).toHaveBeenCalledWith({
+      reason: "exec-event",
+      sessionKey: "agent:ops:main",
+    });
+  });
+
+  it("keeps wake unscoped for non-agent session keys", () => {
+    emitExecSystemEvent("Exec finished", {
+      sessionKey: "global",
+      contextKey: "exec:run-global",
+    });
+
+    expect(enqueueSystemEventMock).toHaveBeenCalledWith("Exec finished", {
+      sessionKey: "global",
+      contextKey: "exec:run-global",
+    });
+    expect(requestHeartbeatNowMock).toHaveBeenCalledWith({
+      reason: "exec-event",
+    });
+  });
+
+  it("ignores events without a session key", () => {
+    emitExecSystemEvent("Exec finished", {
+      sessionKey: "  ",
+      contextKey: "exec:run-2",
+    });
+
+    expect(enqueueSystemEventMock).not.toHaveBeenCalled();
+    expect(requestHeartbeatNowMock).not.toHaveBeenCalled();
+  });
+});