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_components.h

@@ -8,6 +8,8 @@
 
 #pragma once
 
+#include <string>
+
 #include "imgui.h"
 
 namespace dragonx {
@@ -31,5 +33,10 @@ void RenderSharedAddressList(App* app, float listH, float availW, float glassRou
 void RenderSharedRecentTx(App* app, float recentH, float availW, float hs, float vs);
 void RenderSyncBar(App* app, ImDrawList* dl, float vs);
 
+// Total period-earnings for the whole wallet, formatted per the earnings settings. Returns false
+// (and leaves out* untouched) when the global earnings toggle is off, so layouts show it only when
+// the user has opted into the earnings view. Shared by RenderCompactHero and the layout totals.
+bool FormatTotalEarnings(App* app, std::string& outText, ImU32& outCol);
+
 } // namespace ui
 } // namespace dragonx