Merge upstream main: Python plugins, Bambu device rework, macOS fixes

Resolved 4 conflicts:
- PrintConfig.hpp / Preset.cpp: upstream restored calib_flowrate_topinfill_special_order
  (removed in the prior merge, now re-added and re-registered); kept it alongside our
  IMEX options (imex_parallel_mode, imex_head_filament_map).
- Plater.cpp: kept our <sstream> include plus upstream's <optional> and plugin includes.
- tests/fff_print/test_gcodewriter.cpp: both sides appended disjoint scenarios after a
  shared base. Reconstructed as upstream's full file (base + its 3 toolchange/H2C
  scenarios + the boost/filesystem include its helper needs) followed by our 10
  set_pressure_advance / set_temperature scenarios. 22 scenarios total, no duplicates.

src/slic3r/GUI/MainFrame.cpp

@@ -46,6 +46,7 @@
 #include "Widgets/ProgressDialog.hpp"
 #include "BindDialog.hpp"
 #include "../Utils/MacDarkMode.hpp"
+#include "../Utils/NetworkAgentFactory.hpp"
 #include "../Utils/PrintHost.hpp"
 
 #include <fstream>
@@ -3298,10 +3299,11 @@ void MainFrame::init_menubar_as_editor()
         },
         "", nullptr, []() { return true; }, this);
 
-    m_topbar->GetTopMenu()->AppendSeparator();
+    auto top_menu = m_topbar->GetTopMenu();
+    top_menu->AppendSeparator();
 
         append_menu_item(
-        m_topbar->GetTopMenu(), wxID_ANY, _L("Preset Bundle") + "\t", "",
+        top_menu, wxID_ANY, _L("Preset Bundle") + "\t", "",
         [this](wxCommandEvent &) {
             // Orca: Use GUI_App::open_preferences instead of direct call so windows associations are updated on exit
             wxGetApp().open_presetbundledialog();
@@ -3310,7 +3312,7 @@ void MainFrame::init_menubar_as_editor()
         "", nullptr, []() { return true; }, this);
 
     append_menu_item(
-        m_topbar->GetTopMenu(), wxID_ANY, _L("Sync Presets"), _L("Pull and apply the latest presets from OrcaCloud"),
+        top_menu, wxID_ANY, _L("Sync Presets"), _L("Pull and apply the latest presets from OrcaCloud"),
         [this](wxCommandEvent&) {
             if (!wxGetApp().is_user_login()) {
                 MessageDialog info_dlg(this, _L("You must be logged in to sync presets from cloud."),
@@ -3327,12 +3329,19 @@ void MainFrame::init_menubar_as_editor()
             return wxGetApp().is_user_login() && !wxGetApp().app_config->get_stealth_mode();
         }, this);
 
-    m_topbar->GetTopMenu()->AppendSeparator();
+    top_menu->AppendSeparator();
+    append_menu_item(
+        top_menu, wxID_ANY, _L("Plugins") + "\t", "",
+        [this](wxCommandEvent &) {
+            wxGetApp().open_plugins_dialog();
+        },
+        "", nullptr, []() { return true; }, this);
 
     //m_topbar->AddDropDownMenuItem(preference_item);
     //m_topbar->AddDropDownMenuItem(printer_item);
     //m_topbar->AddDropDownMenuItem(language_item);
     //m_topbar->AddDropDownMenuItem(config_item);
+    top_menu->AppendSeparator();
     m_topbar->AddDropDownSubMenu(helpMenu, _L("Help"));
 
     // SoftFever calibrations
@@ -3433,7 +3442,7 @@ void MainFrame::init_menubar_as_editor()
     fileMenu->AppendSeparator();
     append_menu_item(
         fileMenu, wxID_ANY, _L("Preset Bundle"), "",
-        [this](wxCommandEvent &) {
+        [this](wxCommandEvent&) {
             wxGetApp().open_presetbundledialog();
             plater()->get_current_canvas3D()->force_set_focus();
         },
@@ -3457,6 +3466,13 @@ void MainFrame::init_menubar_as_editor()
             return wxGetApp().is_user_login() && !wxGetApp().app_config->get_stealth_mode();
         }, this);
 
+    fileMenu->AppendSeparator();
+    append_menu_item(
+        fileMenu, wxID_ANY, _L("Plugins"), "", [this](wxCommandEvent&) { wxGetApp().open_plugins_dialog(); }, "", nullptr,
+        []() { return true; }, this);
+
+    fileMenu->AppendSeparator();
+
     m_menubar->Append(fileMenu, wxString::Format("&%s", _L("File")));
     if (editMenu)
         m_menubar->Append(editMenu, wxString::Format("&%s", _L("Edit")));
@@ -4261,7 +4277,7 @@ void MainFrame::load_printer_url(wxString url, wxString apikey)
 void MainFrame::load_printer_url()
 {
     PresetBundle &preset_bundle = *wxGetApp().preset_bundle;
-    if (preset_bundle.use_bbl_device_tab())
+    if (preset_bundle.use_bbl_device_tab() || NetworkAgentFactory::is_current_printer_agent_plugin())
         return;
 
     auto     cfg = preset_bundle.printers.get_edited_preset().config;
@@ -4469,4 +4485,3 @@ void SettingsDialog::on_dpi_changed(const wxRect& suggested_rect)
 
 } // GUI
 } // Slic3r
-