feat: mask Merit campaign when aprs are not found

appear when some campaigns are temporary disabled

Author: NandyBa

src/hooks/useMeritIncentives.ts

@@ -16,7 +16,7 @@ export enum MeritAction {
 type MeritIncentives = {
   totalAPR: number;
   actionsAPR: {
-    [key in MeritAction]: number;
+    [key in MeritAction]: number | null | undefined;
   };
 };
 
@@ -141,6 +141,10 @@ export const useMeritIncentives = ({
 
       const APR = data.actionsAPR[incentive.action];
 
+      if (!APR) {
+        return null;
+      }
+
       return {
         incentiveAPR: (APR / 100).toString(),
         rewardTokenAddress: incentive.rewardTokenAddress,