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packages/shared/src/storage/index.ts

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+/**
+ * Storage adapter — Capacitor Preferences (native) with localStorage fallback (browser dev).
+ */
+import { Preferences } from '@capacitor/preferences';
+
+const memoryCache = new Map<string, string>();
+let prefsReady = false;
+
+async function ensurePrefs(): Promise<boolean> {
+  if (prefsReady) return true;
+  try {
+    await Preferences.get({ key: '__probe__' });
+    prefsReady = true;
+    return true;
+  } catch {
+    return false;
+  }
+}
+
+export async function storageGet(key: string): Promise<string | null> {
+  if (memoryCache.has(key)) return memoryCache.get(key) ?? null;
+  if (await ensurePrefs()) {
+    const { value } = await Preferences.get({ key });
+    if (value != null) {
+      memoryCache.set(key, value);
+      return value;
+    }
+  }
+  if (typeof localStorage !== 'undefined') {
+    return localStorage.getItem(key);
+  }
+  return null;
+}
+
+export async function storageSet(key: string, value: string): Promise<void> {
+  memoryCache.set(key, value);
+  if (await ensurePrefs()) {
+    await Preferences.set({ key, value });
+  }
+  if (typeof localStorage !== 'undefined') {
+    localStorage.setItem(key, value);
+  }
+}
+
+export async function storageRemove(key: string): Promise<void> {
+  memoryCache.delete(key);
+  if (await ensurePrefs()) {
+    await Preferences.remove({ key });
+  }
+  if (typeof localStorage !== 'undefined') {
+    localStorage.removeItem(key);
+  }
+}
+
+/** Sync read for hot paths (uses memory cache populated at init). */
+export function storageGetSync(key: string): string | null {
+  if (memoryCache.has(key)) return memoryCache.get(key) ?? null;
+  if (typeof localStorage !== 'undefined') return localStorage.getItem(key);
+  return null;
+}
+
+export function storageSetSync(key: string, value: string): void {
+  memoryCache.set(key, value);
+  if (typeof localStorage !== 'undefined') localStorage.setItem(key, value);
+  void storageSet(key, value);
+}
+
+export async function initStorage(): Promise<void> {
+  const keys = ['gc_device_id', 'gc_user_id', 'gc_username', 'gc_display_name', 'gc_user_role', 'gc_api_base_url'];
+  if (!(await ensurePrefs())) return;
+  for (const key of keys) {
+    const { value } = await Preferences.get({ key });
+    if (value != null) memoryCache.set(key, value);
+  }
+}