Phase 7 dashboard widgets, Gitea CI, and branded landing page (T7.1)

- BookingsTodayWidget, RecentBookingsTableWidget (Booking module) and
  RevenueChartWidget, PaymentFailureRateWidget (Payment module) dashboard
  widgets, auto-registered via each plugin's existing discoverWidgets().
- .gitea/workflows/tests.yml: Postgres-backed Pest run on push/PR.
- Landing page (resources/views/welcome.blade.php) now shows the Famous
  Linnyone4 EV logo with a single admin login link, and the Filament admin
  panel uses the same logo as its brand logo.

app-modules/payment/src/Filament/Widgets/PaymentFailureRateWidget.php

@@ -0,0 +1,42 @@
+<?php
+
+namespace Modules\Payment\Filament\Widgets;
+
+use Filament\Widgets\StatsOverviewWidget as BaseWidget;
+use Filament\Widgets\StatsOverviewWidget\Stat;
+use Modules\Payment\Enums\PaymentStatus;
+use Modules\Payment\Models\Payment;
+
+/**
+ * Failure rate over the trailing 30 days, among payments that reached a
+ * terminal state (completed or failed) — pending attempts are excluded
+ * since they haven't resolved either way yet.
+ */
+class PaymentFailureRateWidget extends BaseWidget
+{
+    protected static ?int $sort = 3;
+
+    protected function getStats(): array
+    {
+        $since = today()->subDays(30);
+
+        $completed = Payment::query()
+            ->where('status', PaymentStatus::Completed)
+            ->where('initiated_at', '>=', $since)
+            ->count();
+
+        $failed = Payment::query()
+            ->where('status', PaymentStatus::Failed)
+            ->where('initiated_at', '>=', $since)
+            ->count();
+
+        $resolved = $completed + $failed;
+        $rate = $resolved > 0 ? round(($failed / $resolved) * 100, 1) : 0.0;
+
+        return [
+            Stat::make('Payment Failure Rate', $rate.'%')
+                ->description("{$failed} failed of {$resolved} resolved (last 30 days)")
+                ->color($rate >= 20 ? 'danger' : ($rate > 0 ? 'warning' : 'success')),
+        ];
+    }
+}