Merge upstream/main into cad-mainline (530 commits)

Catches the fork up from 449a4cf9fc (2026-06-28) to d6cb667b89 (2026-07-24).
Upstream touched 2326 files; 17 of them overlap the 164 this branch touches.

16 of the 17 auto-merged, including all three CMakeLists.txt, the build_all.yml
CI workflow, and every GUI file. The CAD core never conflicts: CadDocument,
SketchEngine, SketchSolver, McpControl and test_caddocument are files this fork
adds, so upstream does not touch them.

The one conflict, tests/libslic3r/test_3mf.cpp, was purely additive in all three
hunks and is resolved as a union: our test pinning that store_bbs_3mf embeds the
CAD recipe as Metadata/SnapOrca_cad.bin, upstream's multi-nozzle plate-metadata
round-trip tests, and both sets of includes. All three were verified present
after resolution rather than assumed.

NOT BUILD-VERIFIED, for a reason that predates this merge and is not caused by
it: this fork cannot be configured on nativedev at all. Its CMakeLists has
required Eigen3 5.0.1 since before the merge (line 592 pre-merge), while the
only deps image on the machine is snaporca-deps, built for snaporca's
find_package(Eigen3 3.3). CMake fails at configure, so nothing compiles.

That means this fork's Catch2 suite has never run. Every "suite green" figure
recorded for M1-M8 was snaporca's suite; the ports were verified by patch-apply
plus the CAD sources being byte-identical to snaporca's. Building an orca_cad
deps image with Eigen 5.0.1 is what would finally close that gap.

Pre-merge state is preserved at branch cad-mainline-pre-upstream-2026-07-25
(30d54f0074).

Co-Authored-By: Claude Opus 5 (1M context) <noreply@anthropic.com>

localization/i18n/list.txt

@@ -41,12 +41,23 @@ src/slic3r/GUI/DeviceCore/DevMapping.h
 src/slic3r/GUI/DeviceCore/DevMapping.cpp
 src/slic3r/GUI/DeviceCore/DevNozzleSystem.h
 src/slic3r/GUI/DeviceCore/DevNozzleSystem.cpp
+src/slic3r/GUI/DeviceCore/DevNozzleRack.h
+src/slic3r/GUI/DeviceCore/DevNozzleRack.cpp
+src/slic3r/GUI/DeviceCore/DevNozzleRackCtrl.cpp
 src/slic3r/GUI/DeviceCore/DevUtil.h
 src/slic3r/GUI/DeviceCore/DevUtil.cpp
 src/slic3r/GUI/DeviceTab/uiAmsHumidityPopup.h
 src/slic3r/GUI/DeviceTab/uiAmsHumidityPopup.cpp
 src/slic3r/GUI/DeviceTab/uiDeviceUpdateVersion.h
 src/slic3r/GUI/DeviceTab/uiDeviceUpdateVersion.cpp
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.h
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRack.cpp
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.h
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackNozzleItem.cpp
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.h
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleRackUpdate.cpp
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.h
+src/slic3r/GUI/DeviceTab/wgtDeviceNozzleSelect.cpp
 src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.cpp
 src/slic3r/GUI/Gizmos/GLGizmoFdmSupports.hpp
 src/slic3r/GUI/Gizmos/GLGizmoFlatten.cpp
@@ -97,6 +108,8 @@ src/slic3r/GUI/Widgets/FilamentLoad.cpp
 src/slic3r/GUI/Widgets/TempInput.cpp
 src/slic3r/GUI/Widgets/CheckList.cpp
 src/slic3r/GUI/Widgets/SwitchButton.cpp
+src/slic3r/GUI/Widgets/MultiNozzleSync.cpp
+src/slic3r/GUI/Widgets/ProgressDialog.cpp
 src/slic3r/GUI/ImGuiWrapper.cpp
 src/slic3r/GUI/Jobs/ArrangeJob.cpp
 src/slic3r/GUI/Jobs/OrientJob.cpp
@@ -227,11 +240,14 @@ src/slic3r/GUI/CreatePresetsDialog.cpp
 src/slic3r/GUI/DailyTips.cpp
 src/slic3r/Utils/CalibUtils.cpp
 src/slic3r/GUI/PhysicalPrinterDialog.cpp
+src/slic3r/GUI/CrealityDiscoveryDialog.cpp
+src/slic3r/GUI/TroubleshootDialog.cpp
 src/slic3r/Utils/3DPrinterOS.cpp
 src/slic3r/Utils/AstroBox.cpp
 src/slic3r/Utils/Duet.cpp
 src/slic3r/Utils/FlashAir.cpp
 src/slic3r/Utils/MKS.cpp
+src/slic3r/Utils/Moonraker.cpp
 src/slic3r/Utils/OctoPrint.cpp
 src/slic3r/Utils/Repetier.cpp
 src/slic3r/Utils/ProfileDescription.hpp
@@ -271,4 +287,6 @@ src/slic3r/GUI/DownloaderFileGet.cpp
 src/slic3r/GUI/FileArchiveDialog.cpp
 src/slic3r/GUI/PrinterCloudAuthDialog.cpp
 src/slic3r/GUI/PrinterWebViewHandler.cpp
+src/slic3r/GUI/AMSDryControl.cpp
+src/slic3r/GUI/AMSDryControl.hpp
 src/libslic3r/PresetBundle.cpp