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/(game)/login/+page.server.ts

@@ -0,0 +1,68 @@
+import { fail, redirect } from '@sveltejs/kit';
+import type { Actions } from './$types';
+import type { PageServerLoad } from './$types';
+import { auth } from '$lib/server/auth';
+import { APIError } from 'better-auth/api';
+
+export const load: PageServerLoad = async (event) => {
+	if (event.locals.user) {
+		return redirect(302, '/');
+	}
+	return {};
+};
+
+export const actions: Actions = {
+	signInEmail: async (event) => {
+		const formData = await event.request.formData();
+		const email = formData.get('email')?.toString() ?? '';
+		const password = formData.get('password')?.toString() ?? '';
+
+		try {
+			await auth.api.signInEmail({
+				body: {
+					email,
+					password,
+					callbackURL: '/auth/verification-success'
+				}
+			});
+		} catch (error) {
+			if (error instanceof APIError) {
+				return fail(400, { message: error.message || 'Signin failed' });
+			}
+			return fail(500, { message: 'Unexpected error' });
+		}
+
+		return redirect(302, '/');
+	},
+	signUpEmail: async (event) => {
+		const formData = await event.request.formData();
+		const email = formData.get('email')?.toString() ?? '';
+		const password = formData.get('password')?.toString() ?? '';
+		const name = formData.get('name')?.toString() ?? '';
+
+		try {
+			await auth.api.signUpEmail({
+				body: {
+					email,
+					password,
+					name,
+					callbackURL: '/auth/verification-success'
+				}
+			});
+		} catch (error) {
+			if (error instanceof APIError) {
+				return fail(400, { message: error.message || 'Registration failed' });
+			}
+			return fail(500, { message: 'Unexpected error' });
+		}
+
+		return redirect(302, '/');
+	},
+	logout: async (event) => {
+		await auth.api.signOut({
+			headers: event.request.headers
+		});
+
+		return redirect(302, '/');
+	}
+};