Add train gold to game info ranking (#2901)

## Description:

The game info panel was missing the gold generated with trains, which
was recently added into the recorded stats.
This PR adds the gold train ranking, grouped with the naval trade.

Visually the game info panel is not matching the new visual identity,
but this PR only focuses on the missing data.

<img width="898" height="482" alt="image"
src="https://github.com/user-attachments/assets/6366e5d2-23b6-40b0-b4d4-1227b5a2f811"
/>


## Please complete the following:

- [x] I have added screenshots for all UI updates
- [x] I process any text displayed to the user through translateText()
and I've added it to the en.json file
- [x] I have added relevant tests to the test directory
- [x] I confirm I have thoroughly tested these changes and take full
responsibility for any bugs introduced

## Please put your Discord username so you can be contacted if a bug or
regression is found:

IngloriousTom

tests/GameInfoRanking.test.ts

@@ -13,6 +13,8 @@ import { AnalyticsRecord } from "../src/core/Schemas";
 import {
   GOLD_INDEX_STEAL,
   GOLD_INDEX_TRADE,
+  GOLD_INDEX_TRAIN_OTHER,
+  GOLD_INDEX_TRAIN_SELF,
   GOLD_INDEX_WAR,
 } from "../src/core/StatsSchemas";
 
@@ -55,7 +57,7 @@ describe("Ranking class", () => {
             stats: {
               units: { port: [2n, 0n, 0n, 2n] },
               conquests: 5n,
-              gold: [0n, 100n, 20n, 0n], // total 120
+              gold: [0n, 100n, 20n, 0n, 15n, 5n], // total 140
               bombs: {
                 abomb: [1n],
                 hbomb: [1n],
@@ -70,7 +72,7 @@ describe("Ranking class", () => {
             stats: {
               units: { city: [2n, 0n, 0n, 2n] },
               conquests: 8n,
-              gold: [0n, 50n, 10n, 5n], // total 65
+              gold: [0n, 50n, 10n, 5n], // total 65, no train trade
               bombs: {
                 abomb: [0n],
                 hbomb: [2n],
@@ -86,7 +88,7 @@ describe("Ranking class", () => {
               // no units, but has conquests/killedAt to count as played
               conquests: 8n,
               killedAt: BigInt(600),
-              gold: [0n, 10n, 2n, 10n], //  total 22
+              gold: [0n, 10n, 2n, 10n, 0n, 5n], //  total 27
               bombs: {},
             },
             persistentID: null,
@@ -178,9 +180,14 @@ describe("Ranking class", () => {
     expect(r.score(p1, RankType.StolenGold)).toBe(
       Number(p1.gold[GOLD_INDEX_STEAL] ?? 0n),
     );
-    expect(r.score(p1, RankType.TradedGold)).toBe(
+    expect(r.score(p1, RankType.NavalTrade)).toBe(
       Number(p1.gold[GOLD_INDEX_TRADE] ?? 0n),
     );
+    const ownTrain = p1.gold[GOLD_INDEX_TRAIN_SELF] ?? 0n;
+    const otherTrain = p1.gold[GOLD_INDEX_TRAIN_OTHER] ?? 0n;
+    expect(r.score(p1, RankType.TrainTrade)).toBe(
+      Number(ownTrain + otherTrain),
+    );
     expect(r.score(p1, RankType.ConqueredGold)).toBe(
       Number(p1.gold[GOLD_INDEX_WAR] ?? 0n),
     );