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>

resources/views/filament/partials/preview-links.blade.php

@@ -0,0 +1,23 @@
+{{-- One link per language: a draft translated into two has two addresses, and
+     whoever is reviewing the Catalan one needs that one. --}}
+<div class="space-y-3">
+    @foreach ($links as $language => $url)
+        <div class="space-y-1">
+            <p class="text-sm font-medium text-gray-700 dark:text-gray-200">{{ $language }}</p>
+
+            <div class="flex items-center gap-2">
+                <input
+                    type="text"
+                    readonly
+                    value="{{ $url }}"
+                    onclick="this.select()"
+                    class="fi-input w-full rounded-lg border-gray-300 bg-gray-50 px-3 py-2 font-mono text-xs text-gray-700 dark:border-white/10 dark:bg-white/5 dark:text-gray-300"
+                />
+
+                <x-filament::button tag="a" href="{{ $url }}" target="_blank" size="sm" color="gray">
+                    {{ __('panel.preview.open') }}
+                </x-filament::button>
+            </div>
+        </div>
+    @endforeach
+</div>