L7 Offline & PWA: Outbox-Kern, IndexedDB-Store, Sync-Engine und Bundle-Logik

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

src/lib/offline/ids.ts

@@ -0,0 +1,28 @@
+/** Device-side ids (moved from src/lib/field/client-ops.ts, which re-exports them). */
+
+/** RFC 4122 v4 id; falls back to getRandomValues outside secure contexts. */
+export function newClientId(): string {
+  const c = globalThis.crypto;
+  if (typeof c?.randomUUID === "function") return c.randomUUID();
+  const b = new Uint8Array(16);
+  c.getRandomValues(b);
+  b[6] = (b[6] & 0x0f) | 0x40;
+  b[8] = (b[8] & 0x3f) | 0x80;
+  const h = [...b].map((x) => x.toString(16).padStart(2, "0")).join("");
+  return `${h.slice(0, 8)}-${h.slice(8, 12)}-${h.slice(12, 16)}-${h.slice(16, 20)}-${h.slice(20)}`;
+}
+
+const DEVICE_KEY = "craftvia.field.deviceId";
+
+export function deviceId(): string {
+  try {
+    let id = localStorage.getItem(DEVICE_KEY);
+    if (!id) {
+      id = newClientId();
+      localStorage.setItem(DEVICE_KEY, id);
+    }
+    return id;
+  } catch {
+    return "unknown-device";
+  }
+}