add getHasPaired / setHasPaired flag to sync-storage.ts

@@ -3,6 +3,27 @@33 const TRUSTED_NETWORKS_KEY = 'peach_trusted_networks';44 const PAIRED_DEVICES_KEY = 'peach_paired_devices';55 const INCOMING_PAIR_KEY = 'peach_incoming_pair';6+const PEACH_HAS_PAIRED_KEY = 'peach_has_paired';7+8+// ---------------------------------------------------------------------------9+// Has-paired flag10+//11+// Set once on first successful pairing. Never cleared — controls whether the12+// sync info sheet is shown.13+// ---------------------------------------------------------------------------14+15+export async function getHasPaired(): Promise<boolean> {16+  try {17+    const result = await chrome.storage.local.get(PEACH_HAS_PAIRED_KEY);18+    return (result as Record<string, unknown>)[PEACH_HAS_PAIRED_KEY] === true;19+  } catch {20+    return false;21+  }22+}23+24+export async function setHasPaired(): Promise<void> {25+  await chrome.storage.local.set({ [PEACH_HAS_PAIRED_KEY]: true });26+}627 728 // ---------------------------------------------------------------------------829 // Trusted Networks