fix: reflect synced preset values in UI without switching tabs

After pulling the latest presets from the cloud, changed values such as Layer height kept showing the old value until the user switched tabs. Refresh the active settings tab on sync so updates appear immediately.

src/libslic3r/Thread.hpp

@@ -46,11 +46,23 @@ void name_tbb_thread_pool_threads_set_locale();
 template<class Fn>
 inline boost::thread create_thread(boost::thread::attributes &attrs, Fn &&fn)
 {
-    // Duplicating the stack allocation size of Thread Building Block worker
-    // threads of the thread pool: allocate 4MB on a 64bit system, allocate 2MB
-    // on a 32bit system by default.
-    
-    attrs.set_stack_size((sizeof(void*) == 4) ? (2048 * 1024) : (4096 * 1024));
+    // Stack size for our worker threads. Originally duplicated TBB's pool
+    // default (4 MB), but the Emboss text-cut path calls into CGAL's
+    // Polygon_mesh_processing::corefine, which falls back from filtered
+    // interval arithmetic to exact rational arithmetic (mpq_class) on
+    // near-degenerate input, and the constrained 2D triangulation walker
+    // (Triangulation_2::march_locate_2D) can recurse deeply enough to
+    // exceed 4 MB on real models -- producing a SIGBUS at the next thread's
+    // stack guard page on macOS / Linux.
+    //
+    // 16 MB chosen as 4x defensive headroom over the observed crash
+    // threshold (n=1 reproducer at exactly 4 MB on macOS arm64). All three
+    // platforms defer-commit reserved stack pages: macOS / Linux mmap the
+    // stack and only fault in pages on touch; Boost.Thread on Win32 passes
+    // STACK_SIZE_PARAM_IS_A_RESERVATION to _beginthreadex, so the value is
+    // a reserve, not the initial commit. Resident memory therefore stays
+    // proportional to actual stack depth on every target.
+    attrs.set_stack_size(16 * 1024 * 1024);
     return boost::thread{attrs, std::forward<Fn>(fn)};
 }
 

src/slic3r/GUI/GUI_App.cpp

@@ -4874,9 +4874,9 @@ void GUI_App::on_http_error(wxCommandEvent &evt)
     if (provider == ORCA_CLOUD_PROVIDER && status >= 400 && code != HttpErrorVersionLimited) {
         wxString msg;
         if (!error.empty()) {
-            msg = wxString::Format(_L("API error (HTTP %u): %s"), status, wxString::FromUTF8(error));
+            msg = wxString::Format(_L("Failed to connect to OrcaCloud.\nPlease check your network connectivity\n(HTTP %u): %s"), status, wxString::FromUTF8(error));
         } else {
-            msg = wxString::Format(_L("API error (HTTP %u)"), status);
+            msg = wxString::Format(_L("Failed to connect to OrcaCloud.\nPlease check your network connectivity\n(HTTP %u)"), status);
         }
         
         if (app_config->get_bool("developer_mode")) {
@@ -4893,7 +4893,7 @@ void GUI_App::on_http_error(wxCommandEvent &evt)
 
         if (!m_is_error_shown) {
             m_is_error_shown = true;
-            wxMessageBox(msg, _L("Orca Cloud API Error"), wxOK | wxICON_ERROR, wxGetApp().mainframe);
+            wxMessageBox(msg, _L("Cloud Error"), wxOK | wxICON_ERROR, wxGetApp().mainframe);
         }
     }
 }
@@ -5849,17 +5849,20 @@ void GUI_App::reload_settings()
         load_pending_vendors();
         preset_bundle->load_user_presets(*app_config, user_presets, ForwardCompatibilitySubstitutionRule::Enable);
         preset_bundle->save_user_presets(*app_config, get_delete_cache_presets());
-        if (is_main_thread_active()) {
+        // Orca: settings changed, refresh ui to reflect the new preset values
+        auto refresh_synced_ui = [this] {
             mainframe->update_side_preset_ui();
-            if (plater_)
-                plater_->sidebar().update_all_preset_comboboxes();
-        } else {
-            CallAfter([this] {
-                mainframe->update_side_preset_ui();
-                if (plater_)
-                    plater_->sidebar().update_all_preset_comboboxes();
-            });
+            for (auto tab : tabs_list) {
+                tab->reload_config();
+                tab->update_changed_ui();
             }
+            if (plater_)
+                plater_->sidebar().update_all_preset_comboboxes();
+        };
+        if (is_main_thread_active())
+            refresh_synced_ui();
+        else
+            CallAfter(refresh_synced_ui);
     }
 }
 

src/slic3r/GUI/MainFrame.cpp

@@ -2788,9 +2788,6 @@ void MainFrame::init_menubar_as_editor()
                     info_dlg.ShowModal();
                     return;
                 }
-                if (m_plater)
-                    m_plater->get_notification_manager()->push_notification(
-                        into_u8(_L("Syncing presets from cloud\u2026")));
                 wxGetApp().restart_sync_user_preset();
             }, "", nullptr,
             [this]() {