feat(payment): implement beautiful payment confirmation page with real-time status checking

- Add PaymentSuccessController with authentication and subscription selection logic
   - Create PaymentConfirmation Livewire component with polling mechanism
   - Implement real-time subscription status verification via Polar provider API
   - Add confetti animation for successful payment confirmation
   - Design responsive payment success page with dark mode support
   - Fix Polar provider field mapping (updated_at -> modified_at)
   - Add comprehensive error handling and logging
   - Support multiple subscription status states (verifying, activated, pending, error)
   - Implement automatic polling with 30-second intervals (max 5 attempts)
   - Add fallback redirects and user-friendly status messages

app/Services/Payments/PaymentOrchestrator.php

@@ -938,4 +938,63 @@ class PaymentOrchestrator
             'avg_extension_days' => $totalExtensions > 0 ? $totalDaysExtended / $totalExtensions : 0,
         ];
     }
+
+    /**
+     * Check subscription status via provider
+     */
+    public function checkSubscriptionStatus(User $user, string $providerName, string $providerSubscriptionId): array
+    {
+        try {
+            $provider = $this->providerRegistry->get($providerName);
+
+            if (! $provider) {
+                return [
+                    'success' => false,
+                    'error' => "Provider {$providerName} not found",
+                ];
+            }
+
+            if (! $provider->isActive()) {
+                return [
+                    'success' => false,
+                    'error' => "Provider {$providerName} is not active",
+                ];
+            }
+
+            Log::info('PaymentOrchestrator: Checking subscription status', [
+                'user_id' => $user->id,
+                'provider' => $providerName,
+                'provider_subscription_id' => $providerSubscriptionId,
+            ]);
+
+            // Get subscription details from provider
+            $details = $provider->getSubscriptionDetails($providerSubscriptionId);
+
+            if (empty($details)) {
+                return [
+                    'success' => false,
+                    'error' => 'Unable to fetch subscription details from provider',
+                ];
+            }
+
+            return [
+                'success' => true,
+                'status' => $details['status'] ?? 'unknown',
+                'details' => $details,
+            ];
+
+        } catch (Exception $e) {
+            Log::error('PaymentOrchestrator: Error checking subscription status', [
+                'user_id' => $user->id,
+                'provider' => $providerName,
+                'provider_subscription_id' => $providerSubscriptionId,
+                'error' => $e->getMessage(),
+            ]);
+
+            return [
+                'success' => false,
+                'error' => $e->getMessage(),
+            ];
+        }
+    }
 }