Exclude contract calls from dust transaction filter

The dust filter was hiding contract interactions (approve, transfer,
etc.) because they have 0 ETH value, which falls below the dust
threshold. Contract calls with 0 ETH are normal — only plain ETH
transfers should be checked against the dust threshold.

Also captures is_contract and method from Blockscout's transaction
response for future use in transaction display.

src/shared/transactions.js

@@ -21,6 +21,7 @@ function parseTx(tx, addrLower) {
     const from = tx.from?.hash || "";
     const to = tx.to?.hash || "";
     const rawWei = tx.value || "0";
+    const toIsContract = tx.to?.is_contract || false;
     return {
         hash: tx.hash,
         blockNumber: tx.block_number,
@@ -34,6 +35,8 @@ function parseTx(tx, addrLower) {
         isError: tx.status !== "ok",
         contractAddress: null,
         holders: null,
+        isContractCall: toIsContract,
+        method: tx.method || null,
     };
 }
 
@@ -166,9 +169,12 @@ function filterTransactions(txs, filters = {}) {
             continue;
         }
 
-        // Filter dust transactions (below gwei threshold) if setting is on
+        // Filter dust transactions (below gwei threshold) if setting is on.
+        // Contract calls (approve, transfer, etc.) often have 0 ETH value
+        // and should never be filtered as dust.
         if (
             filters.hideDustTransactions &&
+            !tx.isContractCall &&
             tx.valueGwei !== null &&
             tx.valueGwei < (filters.dustThresholdGwei || 100000)
         ) {