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/context/auth-context.tsx

@@ -0,0 +1,52 @@
+"use client";
+
+import {
+  createContext,
+  useContext,
+  useState,
+  useEffect,
+  type ReactNode,
+} from "react";
+
+const TOKEN_KEY = "k-tv-token";
+
+interface AuthContextValue {
+  token: string | null;
+  /** True once the initial localStorage read has completed */
+  isLoaded: boolean;
+  setToken: (token: string | null) => void;
+}
+
+const AuthContext = createContext<AuthContextValue | null>(null);
+
+export function AuthProvider({ children }: { children: ReactNode }) {
+  const [token, setTokenState] = useState<string | null>(null);
+  const [isLoaded, setIsLoaded] = useState(false);
+
+  useEffect(() => {
+    const stored = localStorage.getItem(TOKEN_KEY);
+    if (stored) setTokenState(stored);
+    setIsLoaded(true);
+  }, []);
+
+  const setToken = (t: string | null) => {
+    setTokenState(t);
+    if (t) {
+      localStorage.setItem(TOKEN_KEY, t);
+    } else {
+      localStorage.removeItem(TOKEN_KEY);
+    }
+  };
+
+  return (
+    <AuthContext.Provider value={{ token, isLoaded, setToken }}>
+      {children}
+    </AuthContext.Provider>
+  );
+}
+
+export function useAuthContext() {
+  const ctx = useContext(AuthContext);
+  if (!ctx) throw new Error("useAuthContext must be used within AuthProvider");
+  return ctx;
+}