Fix dark-theme backgrounds across device, HMS, and AMS UI on macOS

Give previously-bare panels a keyed background so the existing dark-UI walk
can theme them. Runtime-created widgets (HMS items, device firmware/nozzle
panels) route their whole subtree through one UpdateDarkUIWin(this) call
instead of per-widget darkModeColorFor, which also themes their child text
and follows live light/dark switches. Extruder-card chips re-apply their
colours from Sidebar::sys_color_changed so a live switch updates them too.

src/slic3r/GUI/DeviceTab/uiDeviceUpdateVersion.cpp

@@ -8,6 +8,7 @@
 #include "uiDeviceUpdateVersion.h"
 
 #include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/wxExtensions.hpp"
 #include "slic3r/GUI/Widgets/Label.hpp" // Orca: explicit Label include
 
@@ -27,6 +28,7 @@ uiDeviceUpdateVersion::uiDeviceUpdateVersion(wxWindow* parent,
                                              long style /*= wxTAB_TRAVERSAL*/)
      : wxPanel(parent, id, pos, size, style)
 {
+    SetBackgroundColour(*wxWHITE);
     CreateWidgets();
 }
 
@@ -110,4 +112,6 @@ void uiDeviceUpdateVersion::CreateWidgets()
 
     SetSizer(main_sizer);
     Layout();
+
+    wxGetApp().UpdateDarkUIWin(this);
 }

src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.cpp

@@ -257,7 +257,9 @@ void wgtDeviceNozzleRackArea::CreateGui()
     wxSizer* content_sizer = new wxBoxSizer(wxVERTICAL);
 
     m_panel_content = new wxPanel(m_simple_book, wxID_ANY);
+    m_panel_content->SetBackgroundColour(*wxWHITE);
     m_panel_refresh = new wxPanel(m_simple_book, wxID_ANY);
+    m_panel_refresh->SetBackgroundColour(*wxWHITE);
 
     // Create Hotends ans Rack Position Panel
     wxSizer* hotends_rack_sizer = new wxBoxSizer(wxHORIZONTAL);

src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.cpp

@@ -188,6 +188,7 @@ void wgtDeviceNozzleRackHotendUpdate::CreateGui()
 
     // Icon
     wxPanel* imagePanel = new wxPanel(this);
+    imagePanel->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
     imagePanel->SetMaxSize(WX_DIP_SIZE(46, -1));
     imagePanel->SetMinSize(WX_DIP_SIZE(46, -1));
     imagePanel->SetSize(wxSize(FromDIP(46), FromDIP(-1)));
@@ -203,6 +204,7 @@ void wgtDeviceNozzleRackHotendUpdate::CreateGui()
 
     // Diameter/type (vertical)
     wxPanel* type_panel = new wxPanel(this);
+    type_panel->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
     auto* main_type_sizer = new wxBoxSizer(wxVERTICAL);
     auto* type_sizer_row_1 = new wxBoxSizer(wxHORIZONTAL);
     auto* type_sizer_row_2 = new wxBoxSizer(wxHORIZONTAL);
@@ -251,6 +253,7 @@ void wgtDeviceNozzleRackHotendUpdate::CreateGui()
 
     // SN and version (vertical)
     wxPanel* info_panel = new wxPanel(this);
+    info_panel->SetBackgroundColour(WGT_DEVICE_NOZZLE_RACK_HOTEND_UPDATE_DEFAULT_BG);
     auto* info_sizer = new wxBoxSizer(wxVERTICAL);
     m_sn_label = new Label(info_panel);
     m_sn_label->SetFont(Label::Body_12);

src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.cpp

@@ -9,6 +9,7 @@
 #include "wgtDeviceNozzleRack.h"
 
 #include "slic3r/GUI/I18N.hpp"
+#include "slic3r/GUI/GUI_App.hpp"
 #include "slic3r/GUI/DeviceTab/wgtMsgBox.h"
 #include "slic3r/GUI/Widgets/Label.hpp" // Orca: explicit Label include
 
@@ -28,6 +29,7 @@ wgtDeviceNozzleRackSelect::wgtDeviceNozzleRackSelect(wxWindow *parent) : wxPanel
 static wxPanel* s_create_title(wxWindow *parent, const wxString& text)
 {
     wxPanel *panel = new wxPanel(parent, wxID_ANY);
+    panel->SetBackgroundColour(*wxWHITE);
 
     auto title  = new Label(panel, text);
     title->SetFont(::Label::Body_13);
@@ -35,7 +37,7 @@ static wxPanel* s_create_title(wxWindow *parent, const wxString& text)
     title->SetForegroundColour(0x909090);
 
     auto split_line = new wxPanel(panel, wxID_ANY, wxDefaultPosition, wxDefaultSize, wxTAB_TRAVERSAL);
-    split_line->SetBackgroundColour(0xeeeeee);
+    split_line->SetBackgroundColour(wxColour(0xEE, 0xEE, 0xEE));
     split_line->SetMinSize(wxSize(-1, 1));
     split_line->SetMaxSize(wxSize(-1, 1));
 
@@ -104,6 +106,8 @@ void wgtDeviceNozzleRackSelect::CreateGui()
     SetSizer(main_sizer);
     Layout();
     Fit();
+
+    wxGetApp().UpdateDarkUIWin(this);
 }
 
 static void s_update_nozzle_info(wgtDeviceNozzleRackNozzleItem* item,