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_network.cpp

@@ -1640,6 +1640,61 @@ bool App::isAddressFavorite(const std::string& addr) const
     return settings_ && settings_->isAddressFavorite(addr);
 }
 
+void App::setAddressLabel(const std::string& addr, const std::string& label)
+{
+    if (settings_) {
+        settings_->setAddressLabel(addr, label);
+        settings_->save();
+    }
+}
+
+void App::setAddressIcon(const std::string& addr, const std::string& icon)
+{
+    if (settings_) {
+        settings_->setAddressIcon(addr, icon);
+        settings_->save();
+    }
+}
+
+std::string App::getAddressLabel(const std::string& addr) const
+{
+    if (!settings_) return "";
+    return settings_->getAddressMeta(addr).label;
+}
+
+std::string App::getAddressIcon(const std::string& addr) const
+{
+    if (!settings_) return "";
+    return settings_->getAddressMeta(addr).icon;
+}
+
+int App::getAddressSortOrder(const std::string& addr) const
+{
+    if (!settings_) return -1;
+    return settings_->getAddressMeta(addr).sortOrder;
+}
+
+void App::setAddressSortOrder(const std::string& addr, int order)
+{
+    if (settings_) {
+        settings_->setAddressSortOrder(addr, order);
+        settings_->save();
+    }
+}
+
+int App::getNextSortOrder() const
+{
+    return settings_ ? settings_->getNextSortOrder() : 0;
+}
+
+void App::swapAddressOrder(const std::string& a, const std::string& b)
+{
+    if (settings_) {
+        settings_->swapAddressOrder(a, b);
+        settings_->save();
+    }
+}
+
 // ============================================================================
 // Key Export/Import Operations
 // ============================================================================