feat: modernize address list with drag-transfer, labels, and UX polish

- Rewrite RenderSharedAddressList with two-pass layout architecture
- Add drag-to-transfer: drag address onto another to open transfer dialog
- Add AddressLabelDialog with custom label text and 20-icon picker
- Add AddressTransferDialog with amount input, fee, and balance preview
- Add AddressMeta persistence (label, icon, sortOrder) in settings.json
- Gold favorite border inset 2dp from container edge
- Show hide button on all addresses, not just zero-balance
- Smaller star/hide buttons to clear favorite border
- Semi-transparent dragged row with context-aware tooltip
- Copy-to-clipboard deferred to mouse-up (no copy on drag)
- Themed colors via resolveColor() with CSS variable fallbacks
- Keyboard nav (Up/Down/J/K, Enter to copy, F2 to edit label)
- Add i18n keys for all new UI strings

src/app.cpp

@@ -35,6 +35,8 @@
 #include "ui/windows/block_info_dialog.h"
 #include "ui/windows/export_all_keys_dialog.h"
 #include "ui/windows/export_transactions_dialog.h"
+#include "ui/windows/address_label_dialog.h"
+#include "ui/windows/address_transfer_dialog.h"
 #include "ui/windows/console_tab.h"
 #include "ui/pages/settings_page.h"
 #include "ui/theme.h"
@@ -1347,7 +1349,13 @@ void App::render()
     
     // Export transactions to CSV dialog (triggered from File menu)
     ui::ExportTransactionsDialog::render(this);
-    
+
+    // Address label/icon editor
+    ui::AddressLabelDialog::render();
+
+    // Address-to-address transfer confirmation
+    ui::AddressTransferDialog::render();
+
     // Windows Defender antivirus help dialog
     renderAntivirusHelpDialog();