feat: add UI feedback on http error and some logs

src/slic3r/GUI/GUI_App.cpp

@@ -4848,6 +4848,22 @@ void GUI_App::on_http_error(wxCommandEvent &evt)
         }
         return;
     }
+
+    // Show general error notification for Orca Cloud API failures (not Bambu)
+    if (provider == ORCA_CLOUD_PROVIDER && status >= 400 && code != HttpErrorVersionLimited) {
+        if (m_show_http_errpr_msgdlg)
+            return;
+        m_show_http_errpr_msgdlg = true;
+
+        wxString msg;
+        if (!error.empty()) {
+            msg = wxString::Format(_L("API error (HTTP %u): %s"), status, wxString::FromUTF8(error));
+        } else {
+            msg = wxString::Format(_L("API error (HTTP %u)"), status);
+        }
+        wxMessageBox(msg, _L("Orca Cloud API Error"), wxOK | wxICON_ERROR, wxGetApp().mainframe);
+        m_show_http_errpr_msgdlg = false;
+    }
 }
 
 void GUI_App::enable_user_preset_folder(bool enable)

src/slic3r/Utils/OrcaCloudServiceAgent.cpp

@@ -1304,6 +1304,7 @@ void OrcaCloudServiceAgent::load_sync_state()
             }
         }
     } catch (...) {
+        BOOST_LOG_TRIVIAL(warning) << "load_sync_state: failed to read sync state file, resetting timestamp to 0";
         sync_state.last_sync_timestamp = 0;
     }
 }
@@ -1322,7 +1323,9 @@ void OrcaCloudServiceAgent::save_sync_state()
             ofs.close();
             boost::filesystem::rename(tmp_path, sync_state_path);
         }
-    } catch (...) {}
+    } catch (...) {
+        BOOST_LOG_TRIVIAL(warning) << "save_sync_state: failed to write sync state file";
+    }
 }
 
 void OrcaCloudServiceAgent::clear_sync_state()
@@ -2230,7 +2233,9 @@ void OrcaCloudServiceAgent::json_to_map(const std::string& json, std::map<std::s
                 map[it.key()] = it.value().dump();
             }
         }
-    } catch (...) {}
+    } catch (...) {
+        BOOST_LOG_TRIVIAL(warning) << "json_to_map: failed to parse JSON";
+    }
 }
 
 // ============================================================================