fix(companion): dedupe heartbeat loop scheduled timers

src/companion/heartbeatLoop.test.ts

@@ -217,4 +217,21 @@ describe('CompanionHeartbeatLoop', () => {
       lastFailure: null,
     });
   });
+
+  it('tickNow while running does not accumulate duplicate scheduled timers', async () => {
+    const publishHeartbeat = vi.fn(async () => buildStatusResult());
+    const loop = new CompanionHeartbeatLoop({ publishHeartbeat }, { intervalMs: 1000 });
+
+    loop.start(false);
+    expect(vi.getTimerCount()).toBe(1);
+
+    await loop.tickNow();
+    expect(vi.getTimerCount()).toBe(1);
+    expect(publishHeartbeat).toHaveBeenCalledTimes(1);
+
+    await vi.advanceTimersByTimeAsync(1000);
+    expect(publishHeartbeat).toHaveBeenCalledTimes(2);
+
+    loop.stop();
+  });
 });

src/companion/heartbeatLoop.ts

@@ -138,6 +138,10 @@ export class CompanionHeartbeatLoop {
     if (!this.started) {
       return;
     }
+    if (this.timer) {
+      clearTimeout(this.timer);
+      this.timer = null;
+    }
     const delay = this.computeDelayMs();
     this.timer = setTimeout(() => {
       void this.tick();