## Summary

Follow-up to the feature/OrcaSonar review. Scopes the new behavior to the
OrcaSonar agent, fixes several AMS-sync and lifecycle bugs, and makes the
MQTT tests run in CI. Non-OrcaSonar agents keep their existing behavior.

## Changes

Discovery
- Gate the background SSDP scan to a configured OrcaSonar machine instead of
  running for every non-BBL profile; drive discovery on demand from the
  machine-select popup and back off idle rounds from 5s to 60s.
- Add NSLocalNetworkUsageDescription and NSBonjourServices to both macOS
  Info.plist templates.

AMS sync
- Resolve id-less printer-set trays by material type in get_ams_cobox_infos
  and the sidebar badge loop, matching sync_ams_list, so combo arrays and
  badges stay aligned.
- Keep a printer-set tray that resolved by type out of the "unknown or
  incompatible filaments" dialog.

AMS device UI
- Gate the "Empty" tray classification, and the editable temperature fields,
  to the OrcaSonar agent; Bambu keeps "?" and read-only presets.
- Validate AMS material temps on confirm: reject out-of-range values and
  min > max before the command is sent.

Storage tab
- Bind the show/hide handler on the panel's ancestors (StoragePanel and
  MonitorPanel) and unbind on destruction, so the Bambu file system stops
  when the tab is left.

Transport
- Load /etc/ssl/cert.pem on macOS in add_platform_root_certificates, after
  set_default_verify_paths.
- Release lifecycle_mutex before start()'s connect wait so stop() can cancel
  the attempt and signal completion instead of stalling the UI thread.

Localization
- Add OrcaFilesPanel.cpp to list.txt and regenerate the catalogs.

## Tests
- Un-hide the loopback MockBroker integration tests (ephemeral port, no
  network) so ctest registers and runs them.
- Mock broker tracks SUBSCRIBE/UNSUBSCRIBE and delivers push_report only to a
  subscribed topic; the reconnect test asserts the re-SUBSCRIBE.
- Add bbl empty-tray cases, an AMS combo-alignment case, and unknowns
  assertions to the AMS sync tests.

src/slic3r/GUI/GUI_App.cpp

@@ -1137,7 +1137,8 @@ void GUI_App::post_init()
         m_agent->set_on_http_error_fn([this](CloudEvent event, unsigned int status, std::string body) {
             this->handle_http_error(status, body, event.provider);
         });
-        m_agent->start_discovery(true, false);
+        if (should_start_ssdp_discovery())
+            m_agent->start_discovery(true, false);
     }
 
     //update the plugin tips
@@ -4109,6 +4110,18 @@ std::string GUI_App::resolve_printer_agent_id(const std::string& stored_id) cons
     return (preset_bundle && preset_bundle->is_bbl_vendor()) ? BBL_PRINTER_AGENT_ID : ORCA_PRINTER_AGENT_ID;
 }
 
+bool GUI_App::should_start_ssdp_discovery()
+{
+    // Non-Orca agents (BBL, plugins) keep their own discovery; OrcaSonar only scans in the
+    // background when one of its machines is already configured, otherwise the popup drives it.
+    const std::string agent_id = resolve_printer_agent_id(
+        preset_bundle ? preset_bundle->printers.get_edited_preset().config.opt_string("printer_agent")
+                      : std::string());
+    if (agent_id != ORCA_PRINTER_AGENT_ID)
+        return true;
+    return m_device_manager && !m_device_manager->get_my_machine_list(ORCA_PRINTER_AGENT_ID).empty();
+}
+
 std::string GUI_App::canonical_printer_agent_id(const std::string& picked_id)
 {
     return picked_id == resolve_printer_agent_id("") ? std::string() : picked_id;
@@ -4180,7 +4193,8 @@ void GUI_App::switch_printer_agent()
     BOOST_LOG_TRIVIAL(info) << __FUNCTION__ << ": printer agent switched to " << effective_agent_id;
 
     // Start discovery so Python agents can populate the device list via SSDP callback
-    m_agent->start_discovery(true, false);
+    if (should_start_ssdp_discovery())
+        m_agent->start_discovery(true, false);
 
     // Auto-switch MachineObject (new agent has empty device_info, so always re-select)
     select_machine(effective_agent_id);