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/(main)/dashboard/components/delete-channel-dialog.tsx

@@ -0,0 +1,57 @@
+"use client";
+
+import {
+  AlertDialog,
+  AlertDialogContent,
+  AlertDialogHeader,
+  AlertDialogTitle,
+  AlertDialogDescription,
+  AlertDialogFooter,
+  AlertDialogCancel,
+  AlertDialogAction,
+} from "@/components/ui/alert-dialog";
+
+interface DeleteChannelDialogProps {
+  channelName: string;
+  open: boolean;
+  onOpenChange: (open: boolean) => void;
+  onConfirm: () => void;
+  isPending: boolean;
+}
+
+export function DeleteChannelDialog({
+  channelName,
+  open,
+  onOpenChange,
+  onConfirm,
+  isPending,
+}: DeleteChannelDialogProps) {
+  return (
+    <AlertDialog open={open} onOpenChange={onOpenChange}>
+      <AlertDialogContent className="bg-zinc-900 border-zinc-800 text-zinc-100">
+        <AlertDialogHeader>
+          <AlertDialogTitle>Delete channel?</AlertDialogTitle>
+          <AlertDialogDescription className="text-zinc-400">
+            <span className="font-medium text-zinc-200">{channelName}</span> and
+            all its schedules will be permanently deleted. This cannot be undone.
+          </AlertDialogDescription>
+        </AlertDialogHeader>
+        <AlertDialogFooter>
+          <AlertDialogCancel
+            disabled={isPending}
+            className="border-zinc-700 bg-transparent text-zinc-300 hover:bg-zinc-800 hover:text-zinc-100"
+          >
+            Cancel
+          </AlertDialogCancel>
+          <AlertDialogAction
+            onClick={onConfirm}
+            disabled={isPending}
+            className="bg-red-600 text-white hover:bg-red-700"
+          >
+            {isPending ? "Deleting…" : "Delete"}
+          </AlertDialogAction>
+        </AlertDialogFooter>
+      </AlertDialogContent>
+    </AlertDialog>
+  );
+}