Refresh stale device capability timestamps

tests/device-gui-cli-capabilities.test.ts

@@ -240,3 +240,56 @@ test("device heartbeat does not overwrite the preferred execution mode chosen in
   assert.ok(device);
   assert.equal(device.preferredExecutionMode, "gui");
 });
+
+test("device heartbeat without capability payload refreshes stale gui cli lastSeenAt", async () => {
+  await setup();
+
+  const staleCapabilityTime = "2026-03-25T11:52:00+08:00";
+  const staleState = await readState();
+  await writeState({
+    ...staleState,
+    devices: staleState.devices.map((device) =>
+      device.id === "mac-studio"
+        ? {
+            ...device,
+            lastSeenAt: staleCapabilityTime,
+            capabilities: {
+              gui: {
+                ...device.capabilities?.gui,
+                connected: true,
+                lastSeenAt: staleCapabilityTime,
+                lastActiveProjectId: "master-agent",
+              },
+              cli: {
+                ...device.capabilities?.cli,
+                connected: true,
+                lastSeenAt: staleCapabilityTime,
+                lastActiveProjectId: "master-agent",
+              },
+            },
+          }
+        : device,
+    ),
+  });
+
+  await upsertDeviceHeartbeat({
+    deviceId: "mac-studio",
+    name: "Mac Studio",
+    avatar: "M",
+    account: "17600003315",
+    status: "online",
+    quota5h: 72,
+    quota7d: 86,
+    preferredExecutionMode: "cli",
+    projects: ["硬件审计协作"],
+    endpoint: "mac://kris.local",
+  });
+
+  const state = await readState();
+  const device = state.devices.find((item) => item.id === "mac-studio");
+
+  assert.ok(device);
+  assert.notEqual(device.lastSeenAt, staleCapabilityTime);
+  assert.equal(device.capabilities?.gui.lastSeenAt, device.lastSeenAt);
+  assert.equal(device.capabilities?.cli.lastSeenAt, device.lastSeenAt);
+});