feat: add daily win recording endpoint, user authentication, and profile management

- Implemented a POST endpoint for recording daily wins in the game.
- Created login and signup functionality with email and password.
- Developed a profile page allowing users to update their profile information, change passwords, and manage active sessions.
- Added a toggle feature for switching between login and signup forms.
- Enhanced the layout by removing the profile button and adjusting the header structure.

src/routes/(admin)/admin/+layout.svelte

@@ -0,0 +1,57 @@
+<script lang="ts">
+	import { page } from '$app/stores';
+	import ProfileButton from '$lib/components/ProfileButton.svelte';
+
+	let { children, data } = $props();
+
+	const navItems = [
+		{ href: '/admin', label: 'Dashboard', icon: '📊' },
+		{ href: '/admin/characters', label: 'Characters', icon: '🗣️' },
+		{ href: '/admin/devil-fruits', label: 'Devil Fruits', icon: '🍎' },
+		{ href: '/admin/arcs', label: 'Arcs', icon: '📚' },
+		{ href: '/admin/users', label: 'Users', icon: '👥' },
+		{ href: '/admin/config', label: 'Settings', icon: '⚙️' }
+	];
+
+	const isActive = (href: string, currentPath: string) => {
+		if (href === '/admin') {
+			return currentPath === '/admin';
+		}
+		return currentPath.startsWith(href);
+	};
+</script>
+
+<div class="flex min-h-screen bg-slate-900">
+	<!-- Sidebar -->
+	<aside class="w-64 border-r border-white/5 bg-slate-950">
+		<div class="p-6">
+			<h2 class="text-lg font-black uppercase tracking-[0.15em] text-amber-50">Admin</h2>
+		</div>
+		<nav class="space-y-2 px-3">
+			{#each navItems as item}
+				<a
+					href={item.href}
+					class={`flex items-center gap-3 rounded-lg px-4 py-3 text-sm font-medium transition-colors ${
+						isActive(item.href, $page.url.pathname)
+							? 'bg-amber-600 text-white'
+							: 'text-gray-300 hover:bg-slate-800 hover:text-white'
+					}`}
+				>
+					<span>{item.icon}</span>
+					<span>{item.label}</span>
+				</a>
+			{/each}
+		</nav>
+	</aside>
+
+	<!-- Main content -->
+	<main class="flex-1">
+		<div class="flex items-center justify-between border-b border-white/5 bg-slate-950 px-8 py-4">
+			<h1 class="text-2xl font-bold text-white">Admin Dashboard</h1>
+			<ProfileButton user={data.user} />
+		</div>
+		<div class="p-8">
+			{@render children()}
+		</div>
+	</main>
+</div>