feat: portfolio with subpages, hero homepage, and obfuscated asset URLs

lib/cache.ts

@@ -0,0 +1,45 @@
+/**
+ * Simple in-memory LRU cache for Immich API responses.
+ * Avoids hammering the Immich server with identical requests.
+ */
+
+interface CacheEntry<T> {
+    data: T;
+    expiresAt: number;
+}
+
+class MemoryCache {
+    private store = new Map<string, CacheEntry<unknown>>();
+    private maxEntries = 200;
+
+    get<T>(key: string): T | null {
+        const entry = this.store.get(key);
+        if (!entry) return null;
+
+        if (Date.now() > entry.expiresAt) {
+            this.store.delete(key);
+            return null;
+        }
+
+        return entry.data as T;
+    }
+
+    set<T>(key: string, data: T, ttlMs: number): void {
+        // Evict oldest entries if at capacity
+        if (this.store.size >= this.maxEntries) {
+            const firstKey = this.store.keys().next().value;
+            if (firstKey) this.store.delete(firstKey);
+        }
+
+        this.store.set(key, {
+            data,
+            expiresAt: Date.now() + ttlMs,
+        });
+    }
+
+    clear(): void {
+        this.store.clear();
+    }
+}
+
+export const cache = new MemoryCache();