upgrade auf svelte5

vite.config.ts

@@ -0,0 +1,33 @@
+import tailwindcss from '@tailwindcss/vite';
+import { svelteTesting } from '@testing-library/svelte/vite';
+import { sveltekit } from '@sveltejs/kit/vite';
+import { defineConfig } from 'vite';
+
+export default defineConfig({
+	plugins: [tailwindcss(), sveltekit()],
+	test: {
+		workspace: [
+			{
+				extends: './vite.config.ts',
+				plugins: [svelteTesting()],
+				test: {
+					name: 'client',
+					environment: 'jsdom',
+					clearMocks: true,
+					include: ['src/**/*.svelte.{test,spec}.{js,ts}'],
+					exclude: ['src/lib/server/**'],
+					setupFiles: ['./vitest-setup-client.ts']
+				}
+			},
+			{
+				extends: './vite.config.ts',
+				test: {
+					name: 'server',
+					environment: 'node',
+					include: ['src/**/*.{test,spec}.{js,ts}'],
+					exclude: ['src/**/*.svelte.{test,spec}.{js,ts}']
+				}
+			}
+		]
+	}
+});