chore(codebase): full cleanup pass

backend/Modules/Memberships/Handlers/SubscribeToCreator.cs

@@ -44,7 +44,7 @@ public class SubscribeHandler(
         SubscribeRequest req,
         CancellationToken ct)
     {
-        var tier = await dbContext
+        MembershipTier? tier = await dbContext
             .MembershipTiers
             .Where(tier => tier.Id == req.MembershipTierId)
             .FirstOrDefaultAsync(ct);
@@ -54,7 +54,7 @@ public class SubscribeHandler(
             return;
         }
 
-        var creator = await creatorLookup.GetCreatorAsync(tier.CreatorId, ct);
+        CreatorReference? creator = await creatorLookup.GetCreatorAsync(tier.CreatorId, ct);
         if (creator == null)
         {
             await SendNotFoundAsync(ct);
@@ -68,7 +68,7 @@ public class SubscribeHandler(
         }
 
         // Process Stripe subscription
-        var checkoutSession = await membershipPaymentProcessor.CreateCheckoutSessionAsync(
+        MembershipCheckoutSession checkoutSession = await membershipPaymentProcessor.CreateCheckoutSessionAsync(
             User.GetUserId(),
             creator,
             tier.Id,
@@ -78,6 +78,6 @@ public class SubscribeHandler(
 
         await SendOkAsync(
             new SubscriptionResponse { StripeCheckoutUrl = checkoutSession.Url },
-            cancellation: ct);
+            ct);
     }
 }