fix: the address screen shows a token just added at its fetched balance, not 0.0000 (closes #516)

A balance refresh that returns now draws the balances on AddressDetail or
AddressToken again when that screen is up, not only the wallet list. Their
transaction lists are left alone.

Every add path on AddToken and SettingsAddToken tracks a token through
trackToken(), which gives the tracked record `balanceNotFetched: true`. While
the field is set, the token's line reads `quantity unknown` instead of 0.0000,
and Send reads its balance as unknown. refreshBalances() now resolves with the
tracked tokens whose balance it read at every address. The popup's refresh
deletes the field from those tokens in the stored record and leaves the rest of
the stored list as it is. Removing the token removes the field, and each network
keeps its own records.

Model: opus-5-5

src/popup/index.js

@@ -6,6 +6,7 @@ const {
     saveState,
     onSaveFailure,
     takeStoredNetwork,
+    clearBalanceNotFetched,
     loadState,
 } = require("../shared/state");
 const { StateUnusableError } = require("../shared/stateSchema");
@@ -95,6 +96,17 @@ let refreshTimer = null;
 // removed meanwhile is left as it is. Blockscout may have answered before the
 // user turned "Use Blockscout" off. So the save drops every token the user has
 // not tracked if the stored setting is off by then.
+//
+// The save also deletes `balanceNotFetched` from each tracked token whose
+// balance this refresh read at every address. trackToken() in
+// src/popup/views/helpers.js sets that field. The save takes the field off the
+// matching tokens of the stored record (clearBalanceNotFetched() in
+// src/shared/state.js). The rest of the stored tracked token list stays as it
+// is.
+//
+// Once the save is done, the wallet list is drawn again. So are the balances
+// on AddressDetail or AddressToken when that screen is up. No other screen is
+// drawn again, DeleteAddress and its balance lines included.
 async function doRefreshAndRender() {
     if (refreshInFlight) {
         refreshAgain = true;
@@ -105,7 +117,7 @@ async function doRefreshAndRender() {
         await followStoredSettings();
         const networkId = state.networkId;
         const wallets = structuredClone(state.wallets);
-        await Promise.all([
+        const [, readTokens] = await Promise.all([
             refreshPrices(pageClosed.signal),
             refreshBalances(
                 wallets,
@@ -137,10 +149,13 @@ async function doRefreshAndRender() {
             if (!stored.useBlockscout) {
                 dropUntrackedTokens(state.wallets, stored.trackedTokens);
             }
+            clearBalanceNotFetched(stored, readTokens);
             state.lastBalanceRefresh = Date.now();
             return true;
         });
         renderWalletList();
+        if (state.currentView === "address") addressDetail.renderBalances();
+        if (state.currentView === "address-token") addressToken.renderBalance();
     } catch (e) {
         // No caller waits for this function, so it must never reject. An
         // unhandled rejection reports nothing. The save inside it reports its