Add a statistics page to the panel

The most read, reads per language with a daily chart, and published content
nobody opened, each compared with the period before.

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

app/Filament/Charts/ViewsByLanguageChart.php

@@ -0,0 +1,52 @@
+<?php
+
+declare(strict_types=1);
+
+namespace App\Filament\Charts;
+
+use App\Support\ViewStats;
+use Filament\Widgets\ChartWidget;
+
+/**
+ * Reads per day, one line per language. Lives outside `Filament/Widgets` so
+ * the dashboard does not discover it: it belongs to the statistics page,
+ * which says which period to draw.
+ */
+class ViewsByLanguageChart extends ChartWidget
+{
+    public int $days = 30;
+
+    protected int|string|array $columnSpan = 'full';
+
+    protected ?string $maxHeight = '280px';
+
+    public function getHeading(): string
+    {
+        return __('panel.statistics.daily');
+    }
+
+    protected function getType(): string
+    {
+        return 'line';
+    }
+
+    protected function getData(): array
+    {
+        $daily = (new ViewStats($this->days))->daily();
+        $colors = ['#f59e0b', '#3b82f6', '#10b981', '#ef4444', '#8b5cf6'];
+
+        return [
+            'labels' => $daily['labels'],
+            'datasets' => collect($daily['series'])
+                ->values()
+                ->map(fn (array $data, int $i) => [
+                    'label' => config('locales.supported.'.array_keys($daily['series'])[$i].'.native'),
+                    'data' => $data,
+                    'borderColor' => $colors[$i % count($colors)],
+                    'backgroundColor' => $colors[$i % count($colors)],
+                    'tension' => 0.3,
+                ])
+                ->all(),
+        ];
+    }
+}