feat(sync): add sync-hosts store, NDJSON --json mode, and --check to subminer sync

launcher/sync/sync-hosts.ts

@@ -0,0 +1,41 @@
+import fs from 'node:fs';
+import os from 'node:os';
+import { resolveConfigDir } from '../../src/config/path-resolution.js';
+import {
+  getSyncHostsPath,
+  readSyncHostsState,
+  recordSyncResult,
+  writeSyncHostsState,
+  type SyncResultStatus,
+} from '../../src/shared/sync/sync-hosts-store.js';
+
+export function resolveSyncHostsFilePath(): string {
+  const configDir = resolveConfigDir({
+    platform: process.platform,
+    appDataDir: process.env.APPDATA,
+    xdgConfigHome: process.env.XDG_CONFIG_HOME,
+    homeDir: os.homedir(),
+    existsSync: fs.existsSync,
+  });
+  return getSyncHostsPath(configDir);
+}
+
+// Best-effort bookkeeping so hosts synced from the CLI show up in the sync UI;
+// a failure to persist must never fail the sync itself.
+export function recordHostSyncResultToDisk(
+  host: string,
+  status: SyncResultStatus,
+  detail: string | null,
+): void {
+  try {
+    const filePath = resolveSyncHostsFilePath();
+    const state = recordSyncResult(readSyncHostsState(filePath), host, {
+      atMs: Date.now(),
+      status,
+      detail,
+    });
+    writeSyncHostsState(filePath, state);
+  } catch {
+    // best effort
+  }
+}