fix(ui): drop Validate-address results divider; remove ungapturable daemon-prompt surface

Two sweep-driven fixes:
- Validate Address: remove the input->results Separator. When no result is shown
  yet it sat directly above the Close button and read as a footer divider,
  inconsistent with the reference design (the description divider was already gone).
- Drop the modal-daemon-prompt sweep surface: renderDaemonUpdatePrompt is gated
  behind !capture_mode_, so it never renders during a sweep (the capture showed the
  Settings page behind it). Its migration stays verified via build + the shared
  BlurFloat/TactileButton pattern.

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

src/ui/windows/validate_address_dialog.cpp

@@ -171,8 +171,6 @@ void ValidateAddressDialog::render(App* app)
             ImGui::TextColored(ImVec4(1.0f, 1.0f, 0.0f, 1.0f), "%s", TR("validating"));
         }
 
-        ImGui::Spacing();
-        ImGui::Separator();
         ImGui::Spacing();
 
         // Results