fix: a popup reload no longer logs the requests it cancels on most 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/balanceRefreshCancelled.test.js

@@ -1,13 +1,19 @@
-// The balance refresh does not report a request the popup's own closing
-// cancelled, and still reports one that failed while the popup was open
-// (https://git.eeqj.de/sneak/AutistMask/issues/218).
+// The balance refresh, and the address scan after a wallet is created, do not
+// report a request the popup's own closing cancelled, and still report one
+// that failed while the popup was open
+// (https://git.eeqj.de/sneak/AutistMask/issues/218,
+// https://git.eeqj.de/sneak/AutistMask/issues/475).
 //
 // In the popup a cancelled fetch() fails with the same "Failed to fetch" as a
 // server that cannot be reached, so every request here fails that way, and
 // only the signal the popup aborts on pagehide tells the two cases apart.
 
 const { FetchRequest } = require("ethers");
-const { refreshBalances } = require("../src/shared/balances");
+const { refreshBalances, scanForAddresses } = require("../src/shared/balances");
+const {
+    generateMnemonic,
+    hdWalletFromMnemonic,
+} = require("../src/shared/wallet");
 
 const RPC_URL = "https://rpc.example.invalid";
 const EXPLORER_URL = "https://explorer.example.invalid/api/v2";
@@ -24,8 +30,9 @@ beforeEach(() => {
     const failedToFetch = async () => {
         throw new TypeError("Failed to fetch");
     };
-    // The RPC calls (ETH balance, ENS name) and the explorer request (token
-    // balances) all fail the same way.
+    // The RPC calls (ETH balance, ENS name, and the scan's balance and
+    // transaction count) and the explorer request (token balances) all fail
+    // the same way.
     FetchRequest.registerGetUrl(failedToFetch);
     globalThis.fetch = jest.fn(failedToFetch);
 });
@@ -65,3 +72,24 @@ test("a failure once the popup has closed is not", async () => {
     await refresh(pageClosed.signal);
     expect(logged).toEqual([]);
 });
+
+function scan(signal) {
+    // What the scan found is logged at info level, which is not under test.
+    jest.spyOn(console, "log").mockImplementation(() => {});
+    const { xpub } = hdWalletFromMnemonic(generateMnemonic());
+    return scanForAddresses(xpub, RPC_URL, "mainnet", signal);
+}
+
+test("a scan failure while the popup is open is reported", async () => {
+    await scan(new AbortController().signal);
+    expect(
+        logged.some((line) => line.includes("scanForAddresses check failed")),
+    ).toBe(true);
+});
+
+test("a scan failure once the popup has closed is not", async () => {
+    const pageClosed = new AbortController();
+    pageClosed.abort();
+    await scan(pageClosed.signal);
+    expect(logged).toEqual([]);
+});