Initial commit: Pireon Admin — headless admin panel and public API

Laravel 13 + Filament 5 admin panel and REST API for a non-profit developer
collective, backed by the Pireon OAuth identity server. The public site is a
separate, server-rendered application consuming /api/public/v1.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

app/Rules/UniqueTranslatedSlug.php

@@ -0,0 +1,64 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Rules;
+
+use Closure;
+use Illuminate\Contracts\Validation\ValidationRule;
+use Illuminate\Database\Eloquent\Model;
+
+/**
+ * Enforces slug uniqueness per locale.
+ *
+ * Slugs live inside a JSON map, which no database unique index can cover, so
+ * the check happens here: for each locale in the payload, no *other* row may
+ * already use that slug in that same locale. The same slug in two different
+ * languages is fine.
+ */
+class UniqueTranslatedSlug implements ValidationRule
+{
+    /**
+     * @param  class-string<Model>  $model
+     */
+    public function __construct(
+        protected string $model,
+        protected ?int $ignoreId = null,
+        protected string $column = 'slug',
+    ) {}
+
+    public function validate(string $attribute, mixed $value, Closure $fail): void
+    {
+        $translations = is_string($value)
+            ? [app()->getLocale() => $value]
+            : (array) $value;
+
+        foreach ($translations as $locale => $slug) {
+            if (blank($slug)) {
+                continue;
+            }
+
+            $query = $this->model::query()
+                ->where("{$this->column}->{$locale}", $slug);
+
+            if ($this->ignoreId !== null) {
+                $query->whereKeyNot($this->ignoreId);
+            }
+
+            // Soft-deleted rows still hold their slug, so include them —
+            // otherwise restoring one would resurrect a duplicate.
+            if (method_exists($this->model, 'bootSoftDeletes')) {
+                $query->withTrashed();
+            }
+
+            if ($query->exists()) {
+                $fail(__('rules.slug.unique', [
+                    'slug' => $slug,
+                    'locale' => (string) $locale,
+                ]));
+
+                return;
+            }
+        }
+    }
+}