Warn about calls closing and content coming off the site

A dashboard widget lists what expires in the next two weeks, and a daily
command reminds whoever edits it a week and a day ahead.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

app/Notifications/ExpiringSoon.php

@@ -0,0 +1,50 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Notifications;
+
+use Filament\Actions\Action;
+use Filament\Notifications\Notification as FilamentNotification;
+use Illuminate\Notifications\Notification;
+use Illuminate\Support\Collection;
+
+/**
+ * A digest: what this person looks after that is about to close or come off
+ * the site.
+ */
+class ExpiringSoon extends Notification
+{
+    /**
+     * @param  Collection<int, array<string, mixed>>  $items
+     */
+    public function __construct(public readonly Collection $items) {}
+
+    public function via(object $notifiable): array
+    {
+        return ['database'];
+    }
+
+    public function toDatabase(object $notifiable): array
+    {
+        $first = $this->items->first();
+
+        return FilamentNotification::make()
+            ->title(trans_choice('panel.expiring.notification.title', $this->items->count(), ['count' => $this->items->count()]))
+            ->body($this->items
+                ->map(fn (array $item) => $item['title'].' — '.__('panel.expiring.events.'.$item['event'], [
+                    'when' => $item['at']->diffForHumans(),
+                    'date' => $item['at']->isoFormat('LL'),
+                ]))
+                ->implode("\n"))
+            ->icon('heroicon-o-clock')
+            ->iconColor('warning')
+            ->actions($this->items->count() === 1 ? [
+                Action::make('open')
+                    ->label(__('panel.expiring.notification.open'))
+                    ->url($first['url'])
+                    ->markAsRead(),
+            ] : [])
+            ->getDatabaseMessage();
+    }
+}