fix: a popup reload no longer logs the requests it cancels, except on the transaction detail and confirmation screens (closes #475)

The transaction lists and ENS name lookups on the address and token
screens, the address scan after a wallet is created, the endpoint checks
in Settings, the wait screen's receipt check, the Send screen's Max fee
estimate and the token lookup on both add-token screens now check the
signal the popup aborts on pagehide before reporting a failed request.
scanForAddresses(), resolveEnsNames() and lookupTokenInfo() take the
signal.

End-to-end tests reload the popup on the address screen and during the
address scan with their requests held. Jest tests show each of these
reports a real failure and stays silent once the popup has closed. The
transaction detail and confirmation screens are left out: they discard
the popup context that carries the signal.

Model: opus-5-5

tests/e2e/network.js

@@ -420,12 +420,12 @@ const HOLD_MAX_MS = 30000;
 
 // Hold a reply open for as long as the test asks: until opts[name] is false.
 //
-// The switch (holdGasEstimate or holdBlockscout) is read here rather than
-// captured, so a test flips it on the same options object the route was
-// registered with — the same pattern as seedTokenTransfer. This is the only way
-// to observe a screen while its request is genuinely in flight; sampling the
-// screen and hoping to win a race against the network would assert nothing on
-// a slow machine.
+// The switch (holdGasEstimate, holdTransactionCount or holdBlockscout) is read
+// here rather than captured, so a test flips it on the same options object the
+// route was registered with — the same pattern as seedTokenTransfer. This is
+// the only way to observe a screen while its request is genuinely in flight;
+// sampling the screen and hoping to win a race against the network would
+// assert nothing on a slow machine.
 //
 // It never gives up quietly. A hold that outlives the bound is reported like
 // any other harness fault, because a "pending" state that stopped being
@@ -560,6 +560,9 @@ async function handleRpc(route, postData, opts, report) {
     if (batch.some((req) => req.method === "eth_estimateGas")) {
         await awaitRelease(opts, "holdGasEstimate", report);
     }
+    if (batch.some((req) => req.method === "eth_getTransactionCount")) {
+        await awaitRelease(opts, "holdTransactionCount", report);
+    }
 
     const replies = batch.map((req) => rpcReply(req, opts, report));
     return jsonResponse(route, Array.isArray(payload) ? replies : replies[0]);
@@ -614,6 +617,8 @@ function traceEnabled(raw) {
  *   node-side refusal.
  * @param {boolean} [opts.holdGasEstimate]  hold every batch containing an
  *   eth_estimateGas until this is cleared again.
+ * @param {boolean} [opts.holdTransactionCount]  hold every batch containing an
+ *   eth_getTransactionCount until this is cleared again.
  * @param {boolean} [opts.holdBlockscout]  hold every Blockscout request until
  *   this is cleared again.
  * @param {boolean} [opts.failTransactionList]  fail every request for an