feat(market): redesign the Manage-portfolio editor as a two-column layout

Full redesign of the group edit view (list mode unchanged):

- Two columns in a wider (780px) dialog:
  * LEFT "Appearance": a live preview of the group card (icon + color + name +
    summed DRGX/USD), then Label, the icon picker, and the color picker.
  * RIGHT "Addresses": a search box, Shielded/Transparent/All type filters, a
    "Funded" toggle, Select-shown / Clear, and the address list.
- Reworked address rows: a custom checkbox, a Z/T type chip, the address's own
  label + icon (from the address book), a middle-truncated address, and the
  balance right-aligned. Selected rows sort to the top (then by balance); the
  whole row toggles selection. Replaces the old wall of raw address strings.
- Search filters by address or label; empty-state hint when nothing matches.

New i18n keys (portfolio_appearance/addresses_hdr/search/funded/select_all/
select_shown/group_name/no_addr_match). Full-node + Lite build clean; ctest 1/1;
hygiene clean. Rendering change — needs a screenshot check.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/util/i18n.cpp

@@ -1123,6 +1123,14 @@ void I18n::loadBuiltinEnglish()
         strings_["portfolio_icon"] = "Icon";
         strings_["portfolio_color"] = "Color";
         strings_["portfolio_no_icon"] = "None";
+        strings_["portfolio_appearance"] = "APPEARANCE";
+        strings_["portfolio_addresses_hdr"] = "ADDRESSES";
+        strings_["portfolio_search"] = "Search addresses\xE2\x80\xA6";
+        strings_["portfolio_funded"] = "Funded";
+        strings_["portfolio_select_all"] = "All";
+        strings_["portfolio_select_shown"] = "Select shown";
+        strings_["portfolio_group_name"] = "Group name";
+        strings_["portfolio_no_addr_match"] = "No addresses match";
         strings_["portfolio_manage_title"] = "Manage portfolio";
         strings_["portfolio_add_entry"] = "Add entry";
         strings_["portfolio_new_entry"] = "New entry";