fix: correctly handle token.decimals when value is 0 (#2636)

* fix: correctly handle token.decimals when value is 0

Previously, using "Number(data.token.decimals) || 18" caused a valid token.decimals value of 0 to fall back to 18. This commit updates the logic to correctly use 0 when defined, ensuring accurate calculations for tokens with 0 decimals.

* fix: use nullish coalescing for token decimals

ui/address/tokenSelect/TokenSelectItem.tsx

@@ -20,7 +20,7 @@ const TokenSelectItem = ({ data }: Props) => {
   const secondRow = (() => {
     switch (data.token.type) {
       case 'ERC-20': {
-        const tokenDecimals = Number(data.token.decimals) || 18;
+        const tokenDecimals = Number(data.token.decimals ?? 18);
         const text = `${ BigNumber(data.value).dividedBy(10 ** tokenDecimals).dp(8).toFormat() } ${ data.token.symbol || '' }`;
 
         return (

ui/shared/address/AddressAddToWallet.tsx

@@ -24,7 +24,7 @@ function getRequestParams(token: TokenInfo, tokenId?: string): WatchAssetParams
         options: {
           address: token.address,
           symbol: token.symbol || '',
-          decimals: Number(token.decimals) || 18,
+          decimals: Number(token.decimals ?? '18'),
           image: token.icon_url || '',
         },
       };