fix: add trackedTokens fallback for symbol/name/decimals resolution

Extends the fallback chain to: tb → state.trackedTokens → TOKEN_BY_ADDRESS → '?'

This ensures user-added custom tokens (not just hardcoded known tokens)
display correct symbol, name, and decimals even when Blockscout hasn't
returned balance data (e.g. zero-balance tracked tokens).

src/popup/views/send.js

@@ -74,8 +74,14 @@ function updateSendBalance() {
             (t) => t.address.toLowerCase() === token.toLowerCase(),
         );
         const knownToken = TOKEN_BY_ADDRESS.get(token.toLowerCase());
+        const tracked = (state.trackedTokens || []).find(
+            (t) => t.address.toLowerCase() === token.toLowerCase(),
+        );
         const symbol =
-            (tb && tb.symbol) || (knownToken && knownToken.symbol) || "?";
+            (tb && tb.symbol) ||
+            (tracked && tracked.symbol) ||
+            (knownToken && knownToken.symbol) ||
+            "?";
         const bal = tb ? tb.balance || "0" : "0";
         $("send-balance").textContent =
             "Current balance: " + bal + " " + symbol;
@@ -127,8 +133,14 @@ function init(_ctx) {
                 (t) => t.address.toLowerCase() === token.toLowerCase(),
             );
             const knownTk = TOKEN_BY_ADDRESS.get(token.toLowerCase());
+            const trackedTk = (state.trackedTokens || []).find(
+                (t) => t.address.toLowerCase() === token.toLowerCase(),
+            );
             tokenSymbol =
-                (tb && tb.symbol) || (knownTk && knownTk.symbol) || "?";
+                (tb && tb.symbol) ||
+                (trackedTk && trackedTk.symbol) ||
+                (knownTk && knownTk.symbol) ||
+                "?";
             tokenBalance = tb ? tb.balance || "0" : "0";
         }