feat(URLs): redirect /@uid to /users/uid or /groups/uid

packages/app/src/lib/components/ButtonShare.svelte

@@ -5,6 +5,17 @@
 
   export let white = false;
   export let href = '';
+
+  function rewriteUrl(url: URL): string {
+    const segments = url.pathname.split('/').filter(Boolean);
+    if (['users', 'groups'].includes(segments[0]) && segments.length === 2) {
+      return new URL(url.pathname.replace(`/${segments[0]}/`, '/@'), url.origin)
+        .toString()
+        .replace(/\/$/, '');
+    }
+
+    return url.toString();
+  }
 </script>
 
 <GhostButton
@@ -12,12 +23,12 @@
   on:click={async () => {
     try {
       await navigator.share({
-        url: href || $page.url.toString(),
+        url: href || rewriteUrl($page.url),
         title: document.title,
         text: document.querySelector('meta[name=description]')?.getAttribute('content') ?? '',
       });
     } catch {
-      await navigator.clipboard.writeText(href || $page.url.toString());
+      await navigator.clipboard.writeText(href || rewriteUrl($page.url));
     }
   }}
   darkShadow={white}

packages/app/src/params/entity_handle.ts

+/* eslint-disable unicorn/filename-case */
+import type { ParamMatcher } from '@sveltejs/kit';
+
+export const match: ParamMatcher = (param) => /^@([\w-])+$/.test(param);

packages/app/src/routes/[entity=entity_handle]/+server.ts

+import { loadQuery } from '$lib/zeus';
+import { redirect, type RequestHandler } from '@sveltejs/kit';
+
+export const GET: RequestHandler = async ({ params, locals, fetch }) => {
+  const uid = params.entity!.replace('@', '');
+  let isGroup = false;
+  try {
+    await loadQuery(
+      {
+        group: [{ uid }, { __typename: true }],
+      },
+      {
+        fetch,
+        // eslint-disable-next-line @typescript-eslint/require-await
+        async parent() {
+          return {
+            me: undefined,
+            mobile: locals.mobile,
+            token: undefined,
+          };
+        },
+      }
+    );
+    isGroup = true;
+  } catch {}
+
+  const error = isGroup ? redirect(301, `/groups/${uid}`) : redirect(301, `/users/${uid}`);
+  throw error;
+};