fix: early return on invalid permalinks

resolves #255

pages/[...permalink].vue

@@ -3,10 +3,15 @@ import { parseURL } from 'ufo'
 
 definePageMeta({
   middleware: async (to) => {
+    const HANDLED_MASTO_URL = /^(https?:\/\/)?(\w+\.)+\w+\/(@[@\w\d\.]+)(\/\d+)?$/
+    try {
       let permalink = Array.isArray(to.params.permalink)
         ? to.params.permalink.join('/')
         : to.params.permalink
 
+      if (!HANDLED_MASTO_URL.test(permalink))
+        return '/home'
+
       if (!permalink.startsWith('http'))
         permalink = `https://${permalink}`
 
@@ -29,6 +34,8 @@ definePageMeta({
       }
       if (accounts[0])
         return getAccountPath(accounts[0])
+    }
+    catch {}
 
     return '/home'
   },