fix: Use native img tags for admin pages

- Replace next/image with native img tags in admin bottles, splits, tastings
- Remove hardcoded Supabase hostname from next.config.mjs
- Native img works with any hostname without config changes on deploy

src/app/admin/tastings/AdminTastingsList.tsx

@@ -2,7 +2,6 @@
 
 import { useState, useMemo } from 'react';
 import { Search, User, Star, Wine, MessageSquare } from 'lucide-react';
-import Image from 'next/image';
 
 interface Tasting {
     id: string;
@@ -139,11 +138,9 @@ export default function AdminTastingsList({ tastings }: AdminTastingsListProps)
                                 {/* Bottle Image */}
                                 <div className="w-16 h-16 rounded-xl overflow-hidden bg-zinc-800 flex-shrink-0">
                                     {tasting.bottle?.image_url ? (
-                                        <Image
+                                        <img
                                             src={tasting.bottle.image_url}
                                             alt={tasting.bottle.name || 'Bottle'}
-                                            width={64}
-                                            height={64}
                                             className="w-full h-full object-cover"
                                         />
                                     ) : (