test: update health/status and legacy migration coverage

src/commands/health.snapshot.test.ts

@@ -30,10 +30,6 @@ vi.mock("../web/auth-store.js", () => ({
   logWebSelfId: vi.fn(),
 }));
 
-vi.mock("../web/reconnect.js", () => ({
-  resolveHeartbeatSeconds: vi.fn(() => 60),
-}));
-
 describe("getHealthSnapshot", () => {
   afterEach(() => {
     vi.unstubAllGlobals();
@@ -229,4 +225,32 @@ describe("getHealthSnapshot", () => {
     expect(telegram.probe?.ok).toBe(false);
     expect(telegram.probe?.error).toMatch(/network down/i);
   });
+
+  it("disables heartbeat for agents without heartbeat blocks", async () => {
+    testConfig = {
+      agents: {
+        defaults: {
+          heartbeat: {
+            every: "30m",
+            target: "last",
+          },
+        },
+        list: [
+          { id: "main", default: true },
+          { id: "ops", heartbeat: { every: "1h", target: "whatsapp" } },
+        ],
+      },
+    };
+    testStore = {};
+
+    const snap = await getHealthSnapshot({ timeoutMs: 10, probe: false });
+    const byAgent = new Map(snap.agents.map((agent) => [agent.agentId, agent] as const));
+    const main = byAgent.get("main");
+    const ops = byAgent.get("ops");
+
+    expect(main?.heartbeat.everyMs).toBeNull();
+    expect(main?.heartbeat.every).toBe("disabled");
+    expect(ops?.heartbeat.everyMs).toBeTruthy();
+    expect(ops?.heartbeat.every).toBe("1h");
+  });
 });