Initial release v1.0.0

frontend/utils/cn.ts

@@ -0,0 +1,25 @@
+import { type ClassValue, clsx } from "clsx";
+import { twMerge } from "tailwind-merge";
+
+export function cn(...inputs: ClassValue[]) {
+  return twMerge(clsx(inputs));
+}
+
+/**
+ * Check if a URL is a local/development URL that shouldn't be optimized by Next.js Image.
+ * Includes localhost, 127.0.0.1, 10.0.2.2 (Android emulator), and private network ranges.
+ */
+export function isLocalUrl(url: string): boolean {
+  return (
+    url.startsWith("http://localhost") ||
+    url.startsWith("http://127.0.0.1") ||
+    url.startsWith("http://10.0.2.2") ||      // Android emulator host
+    url.startsWith("http://10.0.3.2") ||      // Genymotion emulator host
+    url.startsWith("http://192.168.") ||      // Private network
+    url.startsWith("http://10.") ||           // Private network (broader)
+    url.startsWith("http://172.16.") ||       // Private network
+    url.startsWith("http://172.17.") ||       // Docker bridge
+    url.startsWith("http://172.18.") ||       // Docker network
+    url.startsWith("http://host.docker.internal")  // Docker for desktop
+  );
+}