use runes mode, allow switching locale without js

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

app/src/components/service.svelte

@@ -2,7 +2,7 @@
   import { time_from_ts } from "$lib/util.js";
   import { _, locale } from "$lib/locale.js";
 
-  export let service = {};
+  let { service } = $props();
 </script>
 
 <main>