feat(balance): inline period-earnings in the address list and totals

Surfaces the period-earnings aggregator in the Balance tab:
- Toolbar (shared address list): interval pills (1H/1D/1M/1Y), a received-
  vs-net mode toggle, and a global show-all toggle, placed right of "Hide 0
  Balances". The New Z-Address / New mining address buttons move to a footer
  row across from "Showing X of Y" to make room.
- Per address: the row draws its earnings on line 2, left of the $USD value
  (green positive, red negative in net mode), shown when the global toggle
  is on or the address is opted in via a new "Show/Hide earnings" right-click
  item. Works in every layout via the shared list.
- Total: FormatTotalEarnings (gated on the global toggle, so the default
  appearance is unchanged) is wired into the compact hero (dashboard/minimal)
  and the classic layout, left of / beside their USD figure. The remaining
  layouts' totals are not wired yet.
- Settings > Appearance: an "Earnings Display Format" selector (Coin /
  Coin + fiat / Fiat).

New i18n keys are translated into all eight locales; the CJK subset font is
rebuilt for the new glyphs. Builds + test suites pass on both variants.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/ui/windows/balance_tab.cpp

@@ -364,7 +364,7 @@ static void RenderBalanceClassic(App* app)
                         OnSurfaceMedium(), DRAGONX_TICKER);
             cy += sub1->LegacySize + valGap;
 
-            // USD value
+            // USD value (+ total period-earnings to its right when the earnings toggle is on)
             {
                 double usd_value = state.getBalanceUSD();
                 if (usd_value > 0.0)
@@ -373,6 +373,12 @@ static void RenderBalanceClassic(App* app)
                     snprintf(buf, sizeof(buf), "$-.-- USD");
                 dl->AddText(capFont, capFont->LegacySize, ImVec2(cx, cy),
                             OnSurfaceDisabled(), buf);
+                std::string earnText; ImU32 earnCol;
+                if (FormatTotalEarnings(app, earnText, earnCol)) {
+                    float usdW = capFont->CalcTextSizeA(capFont->LegacySize, 10000, 0, buf).x;
+                    dl->AddText(capFont, capFont->LegacySize,
+                                ImVec2(cx + usdW + tickGap * 3.0f, cy), earnCol, earnText.c_str());
+                }
             }
             cy += capFont->LegacySize + 2 * dp;