verify changes

[Randalphwa]

• Fix compiler warnings and errors

• Rename shadowing variables in src/import/import_dialogblocks.cpp

• Silence "ignored return value" warning in src/panels/base_panel.cpp with std::ignore

• Verify changes to lunasvg and Dark Mode

• Update MSWEnableDarkMode() call in src/mainapp.cpp to use the new wxApp::DarkMode_Auto parameter value

• Redesign src/art_src/wxUiEditor.svg and src/art_src/debug_logo.svg with simplified shapes, updated gradients, and standard SVG shadow filters (compatible with lunasvg)

• Regenerate embedded image data in src/wxui/ui_images.cpp and src/wxui/ui_images.h from the updated SVGs

• Add debug-only logo swapping in src/mainframe.cpp, src/ui/startup_dlg.cpp, and src/panels/base_panel.cpp to visually distinguish debug builds