feat: implement authentication context and hooks for user management

- Add AuthContext to manage user authentication state and token storage.
- Create hooks for login, registration, and logout functionalities.
- Implement dashboard layout with authentication check and loading state.
- Enhance dashboard page with channel management features including create, edit, and delete channels.
- Integrate API calls for channel operations and current broadcast retrieval.
- Add stream URL resolution via server-side API route to handle redirects.
- Update TV page to utilize new hooks for channel and broadcast management.
- Refactor components for better organization and user experience.
- Update application metadata for improved branding.

k-tv-frontend/app/(auth)/layout.tsx

@@ -0,0 +1,12 @@
+import type { ReactNode } from "react";
+
+export default function AuthLayout({ children }: { children: ReactNode }) {
+  return (
+    <div className="flex min-h-screen flex-col items-center justify-center bg-zinc-950 px-4">
+      <div className="mb-8 text-sm font-semibold tracking-widest text-zinc-100 uppercase">
+        K-TV
+      </div>
+      {children}
+    </div>
+  );
+}