use runes mode, allow switching locale without js

Signed-off-by: ngn <ngn@ngn.tf>

app/src/components/page.svelte

@@ -2,16 +2,16 @@
   import { click } from "$lib/util.js";
   import { page } from "$app/stores";
 
-  export let link;
+  let { link, children } = $props();
 </script>
 
 <a
   class={$page.url.pathname === link ? "active" : "inactive"}
   data-sveltekit-preload-data
-  on:click={click}
+  onclick={click}
   href={link}
 >
-  <slot></slot>
+  {@render children()}
 </a>
 
 <style>