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/Filament/Resources/SettingsResource/Schemas/SettingsForm.php

@@ -0,0 +1,56 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Filament\Resources\SettingsResource\Schemas;
+
+use Filament\Forms\Components\Textarea;
+use Filament\Forms\Components\TextInput;
+use Filament\Schemas\Components\Section;
+use Filament\Schemas\Schema;
+
+class SettingsForm
+{
+    public static function configure(Schema $schema): Schema
+    {
+        return $schema->components([
+            Section::make(__('panel.settings.sections.general'))
+                ->schema([
+                    TextInput::make('key')
+                        ->label(__('panel.settings.fields.key'))
+                        ->disabled()
+                        ->columnSpanFull(),
+
+                    /*
+                     * Raw JSON rather than a key/value editor.
+                     *
+                     * A setting holds whatever it holds: `site.maintenance` is
+                     * a map containing another map of translations. A
+                     * key/value grid can only show one flat level, so it would
+                     * render the nested part as text and write that text back
+                     * on save — quietly destroying every translation of the
+                     * maintenance notice.
+                     *
+                     * Showing the value as it really is cannot lie about it,
+                     * and the `json` rule means a typo is refused rather than
+                     * stored.
+                     */
+                    Textarea::make('value')
+                        ->label(__('panel.settings.fields.value'))
+                        ->helperText(__('panel.settings.fields.value_hint'))
+                        ->rows(12)
+                        ->columnSpanFull()
+                        ->extraInputAttributes(['class' => 'font-mono text-sm'])
+                        ->rule('json')
+                        ->formatStateUsing(fn (mixed $state): string => json_encode(
+                            $state,
+                            JSON_PRETTY_PRINT | JSON_UNESCAPED_UNICODE | JSON_UNESCAPED_SLASHES,
+                        ) ?: 'null')
+                        ->dehydrateStateUsing(fn (?string $state): mixed => json_decode(
+                            (string) $state,
+                            associative: true,
+                        )),
+                ]),
+        ]);
+    }
+}