use unocss, add blog, ui changes

vite.config.ts

@@ -1,9 +1,9 @@
 import { sveltekit } from "@sveltejs/kit/vite";
 import unoCSS from "unocss/vite";
+import { defineConfig } from "vite";
 
-/** @type {import('vite').UserConfig} */
-const config = {
+const config = defineConfig({
 	plugins: [sveltekit(), unoCSS()]
-};
+});
 
 export default config;