Use uri for the like and bookmark permalinks

`uri` is the attribute every other postable model uses for its absolute
permalink on this site. Add it to Like, which had none, and rename
Bookmark's `local_uri` to match. `url` stays as the thing being liked or
bookmarked.

Refs #148

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Models/Bookmark.php

@@ -25,7 +25,7 @@ class Bookmark extends Model
         return $this->belongsToMany('App\Models\Tag');
     }
 
-    protected function localUri(): Attribute
+    protected function uri(): Attribute
     {
         return Attribute::get(
             get: fn () => config('app.url').'/bookmarks/'.$this->id,