fix: address PR review feedback

- Move sleep before receipt check to avoid unnecessary 2s delay on timeout
- Add comment about signed int normalization scope (uint256 only)

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

Author: arein

src/auth.rs

@@ -121,15 +121,17 @@ pub async fn send_and_confirm_cwp_tx(
         .await
         .context("CWP send-transaction failed")?;
 
-    // Wait for on-chain confirmation (poll immediately, then every 2s, timeout at 2 min)
-    for _ in 0..60 {
+    // Wait for on-chain confirmation (poll every 2s, timeout at 2 min)
+    for i in 0..60 {
+        if i > 0 {
+            tokio::time::sleep(std::time::Duration::from_secs(2)).await;
+        }
         if let Some(receipt) = provider.get_transaction_receipt(tx_hash).await? {
             if !receipt.status() {
                 bail!("Transaction {tx_hash} reverted on-chain");
             }
             return Ok(tx_hash);
         }
-        tokio::time::sleep(std::time::Duration::from_secs(2)).await;
     }
     bail!("Transaction {tx_hash} not confirmed after 2 minutes")
 }

src/cwp.rs

@@ -420,7 +420,9 @@ fn normalize_value(
     type_map: &HashMap<String, HashMap<String, String>>,
 ) {
     if sol_type.starts_with("uint") || sol_type.starts_with("int") {
-        // Convert hex "0x..." to decimal string
+        // Convert hex "0x..." to decimal string.
+        // Note: uses U256 for both uint and int types. Polymarket only uses uint256;
+        // proper signed int support would need I256 if int types are ever used.
         if let Some(s) = value.as_str() {
             if let Some(hex) = s.strip_prefix("0x").or_else(|| s.strip_prefix("0X")) {
                 if let Ok(n) = U256::from_str_radix(hex, 16) {