Initial commit MKD fixes

hooks/useCachedFetch.ts

@@ -0,0 +1,17 @@
+/** Читает кеш из localStorage */
+export function readCache<T>(key: string, fallback: T): T {
+  try {
+    const raw = localStorage.getItem(key);
+    if (!raw) return fallback;
+    return JSON.parse(raw) as T;
+  } catch {
+    return fallback;
+  }
+}
+
+/** Сохраняет в кеш */
+export function saveCache(key: string, data: unknown): void {
+  try {
+    localStorage.setItem(key, JSON.stringify(data));
+  } catch (_) {}
+}