refactor(guest): retire legacy guest app and move shared modules

resources/js/shared/guest/queue/idb.ts

@@ -0,0 +1,34 @@
+// @ts-nocheck
+export type TxMode = 'readonly' | 'readwrite';
+
+export function openDB(): Promise<IDBDatabase> {
+  return new Promise((resolve, reject) => {
+    const req = indexedDB.open('guest-upload-queue', 1);
+    req.onupgradeneeded = () => {
+      const db = req.result;
+      if (!db.objectStoreNames.contains('items')) {
+        const store = db.createObjectStore('items', { keyPath: 'id', autoIncrement: true });
+        store.createIndex('status', 'status', { unique: false });
+        store.createIndex('nextAttemptAt', 'nextAttemptAt', { unique: false });
+      }
+    };
+    req.onsuccess = () => resolve(req.result);
+    req.onerror = () => reject(req.error);
+  });
+}
+
+export async function withStore<T>(mode: TxMode, fn: (store: IDBObjectStore) => void | Promise<T>): Promise<T> {
+  const db = await openDB();
+  return new Promise((resolve, reject) => {
+    const tx = db.transaction('items', mode);
+    const store = tx.objectStore('items');
+    let result: unknown;
+    const wrap = async () => {
+      try { result = await fn(store); } catch (e) { reject(e); }
+    };
+    wrap();
+    tx.oncomplete = () => resolve(result);
+    tx.onerror = () => reject(tx.error);
+    tx.onabort = () => reject(tx.error);
+  });
+}