Merge pull request #692: feat(header): opt-in GPU and CPU clock readings after CPU and MEM

Conflict in config/test-suites.ts resolved by keeping both sides: #689's
header-divider and #692's header-host-sensors browser tests are both
listed in BROWSER_TEST_GLOBS.

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/web/server.ts

@@ -45,6 +45,7 @@ import { looksLikeHostReboot, newestPersistedActivity, planRebootRestore } from
 import { rebootRestoreRegistry } from './reboot-restore-registry.js';
 import { dataPath, getDataDir, CODEMAN_INSTANCE } from '../config/instance.js';
 import { WebhookNotifier, readWebhookConfig } from '../webhook-notify.js';
+import { stopHostSensors } from '../host-sensors.js';
 import type { WebhookUrgency } from '../types/push.js';
 import { webviewFetch } from './webview-egress.js';
 import { readRemoteHosts, rehydrateRemoteHostFields } from '../remote-hosts.js';
@@ -4175,6 +4176,9 @@ export class WebServer extends EventEmitter {
     // got wrong once.
     void stopDeepSeekWeb();
 
+    // The header's GPU / CPU clock sampler is a Windows child process under WSL, and its idle sweep a timer.
+    stopHostSensors();
+
     // Same teardown rule: the per-endpoint llama-swap log tails are otherwise closed
     // only by the periodic idle sweep, whose interval is disposed just below.
     closeAllLlamaSwapLogTails();