fix(gallery): fill tall portrait cards to full block width with object-cover crop

- ArtworkCard: add w-full to nova-card-media, use absolute inset-0 on img so
  object-cover fills the max-height capped box instead of collapsing the width
- MasonryGallery.css: add width:100% to media container, position img
  absolutely so top/bottom is cropped rather than leaving dark gaps
- Add React MasonryGallery + ArtworkCard components and entry point
- Add recommendation system: UserRecoProfile model/DTO/migration,
  SuggestedCreatorsController, SuggestedTagsController, Recommendation
  services, config/recommendations.php
- SimilarArtworksController, DiscoverController, HomepageService updates
- Update routes (api + web) and discover/for-you views
- Refresh favicon assets, update vite.config.js

app/Models/UserRecoProfile.php

@@ -0,0 +1,73 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Models;
+
+use App\DTOs\UserRecoProfileDTO;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/**
+ * Persisted cache of a user's recommendation preference profile.
+ *
+ * Schema: user_reco_profiles (user_id PK, json columns, timestamps).
+ * Rebuilt by UserPreferenceBuilder → stale when updated_at < now() - TTL.
+ */
+class UserRecoProfile extends Model
+{
+    protected $table = 'user_reco_profiles';
+
+    protected $primaryKey = 'user_id';
+    public $incrementing  = false;
+    protected $keyType    = 'int';
+
+    protected $guarded = [];
+
+    protected $casts = [
+        'top_tags_json'              => 'array',
+        'top_categories_json'        => 'array',
+        'followed_creator_ids_json'  => 'array',
+        'tag_weights_json'           => 'array',
+        'category_weights_json'      => 'array',
+        'disliked_tag_ids_json'      => 'array',
+    ];
+
+    // ── Relations ─────────────────────────────────────────────────────────────
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    // ── Helpers ───────────────────────────────────────────────────────────────
+
+    /**
+     * Hydrate a DTO from this model's JSON columns.
+     */
+    public function toDTO(): UserRecoProfileDTO
+    {
+        return new UserRecoProfileDTO(
+            topTagSlugs:      (array) ($this->top_tags_json             ?? []),
+            topCategorySlugs: (array) ($this->top_categories_json       ?? []),
+            strongCreatorIds: array_map('intval', (array) ($this->followed_creator_ids_json ?? [])),
+            tagWeights:       array_map('floatval', (array) ($this->tag_weights_json         ?? [])),
+            categoryWeights:  array_map('floatval', (array) ($this->category_weights_json    ?? [])),
+            dislikedTagSlugs: (array) ($this->disliked_tag_ids_json     ?? []),
+        );
+    }
+
+    /**
+     * True when the stored profile is still within the configured TTL.
+     */
+    public function isFresh(): bool
+    {
+        if ($this->updated_at === null) {
+            return false;
+        }
+
+        $ttl = (int) config('recommendations.ttl.user_reco_profile', 6 * 3600);
+
+        return $this->updated_at->addSeconds($ttl)->isFuture();
+    }
+}