Add Local-Z wipe tower reserve planning and pass ordering

Add startup profiling for GUI initialization
Drop unusable Bonjour sockets and harden socket cleanup
Add /FS to MSVC parallel compile options

tests/libslic3r/CMakeLists.txt

@@ -11,6 +11,7 @@ add_executable(${_TEST_NAME}_tests
 	test_elephant_foot_compensation.cpp
 	test_geometry.cpp
 	test_mixed_filament.cpp
+	test_local_z_order_optimizer.cpp
 	test_placeholder_parser.cpp
 	test_polygon.cpp
 	test_mutable_polygon.cpp

tests/libslic3r/test_local_z_order_optimizer.cpp

@@ -0,0 +1,29 @@
+#include <catch2/catch.hpp>
+
+#include "libslic3r/LocalZOrderOptimizer.hpp"
+
+using namespace Slic3r;
+
+TEST_CASE("Local-Z bucket ordering starts with the active extruder when possible", "[LocalZ][GCode]")
+{
+    const std::vector<unsigned int> ordered =
+        LocalZOrderOptimizer::order_bucket_extruders({1, 2}, 2, 1);
+
+    REQUIRE(ordered == std::vector<unsigned int>{2, 1});
+}
+
+TEST_CASE("Local-Z pass groups keep a matching active extruder bucket first", "[LocalZ][GCode]")
+{
+    const std::vector<size_t> ordered =
+        LocalZOrderOptimizer::order_pass_group({{1}, {2}}, 2);
+
+    REQUIRE(ordered == std::vector<size_t>{1, 0});
+}
+
+TEST_CASE("Local-Z pass groups keep original order when no bucket matches the active extruder", "[LocalZ][GCode]")
+{
+    const std::vector<size_t> ordered =
+        LocalZOrderOptimizer::order_pass_group({{1}, {2}, {3}}, 0);
+
+    REQUIRE(ordered == std::vector<size_t>{0, 1, 2});
+}