Add upcoming renewals page with days-until-renewal indicators

Shows subscriptions nearing renewal with color-coded urgency chips,
auto-renew status, and quick manage links.

Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>

website/app/Http/Controllers/Account/BillingController.php

@@ -142,6 +142,39 @@ class BillingController extends Controller
         ]);
     }
 
+    public function upcomingRenewals(Request $request): Response
+    {
+        $user = $request->user();
+
+        $renewals = $user->subscriptions()
+            ->with('plan')
+            ->whereIn('stripe_status', ['active', 'trialing'])
+            ->whereNotNull('current_period_end')
+            ->orderBy('current_period_end')
+            ->get()
+            ->map(function ($subscription) use ($user) {
+                $service = $user->services()
+                    ->where('subscription_id', $subscription->id)
+                    ->first();
+
+                return [
+                    'id' => $subscription->id,
+                    'plan_name' => $subscription->plan?->name ?? $subscription->type,
+                    'plan_price' => $subscription->plan?->price,
+                    'billing_cycle' => $subscription->plan?->billing_cycle,
+                    'renewal_date' => $subscription->current_period_end,
+                    'status' => $subscription->stripe_status,
+                    'auto_renew' => $service?->auto_renew ?? true,
+                    'service_id' => $service?->id,
+                    'days_until_renewal' => now()->diffInDays($subscription->current_period_end, false),
+                ];
+            });
+
+        return Inertia::render('Billing/UpcomingRenewals', [
+            'renewals' => $renewals,
+        ]);
+    }
+
     public function setupIntent(Request $request): JsonResponse
     {
         $user = $request->user();