Speed up profile loading with per-vendor preset caches

Each vendor's system presets are serialized into a <vendor>.opc cache
that the app loads instead of parsing the profile JSONs, falling back
to the parse whenever no cache covers what is installed. Shipped builds
carry the caches instead of the raw profiles, installing and updating
treat a vendor's cache as its installation, and the setup wizard loads
through the same path. Per-platform scripts and CI generate the caches
at build time; tests and a design doc cover the format and its
validation.

src/slic3r/GUI/WebGuideDialog.hpp

@@ -30,10 +30,14 @@
 #include "libslic3r/PresetBundle.hpp"
 #include "slic3r/Utils/PresetUpdater.hpp"
 
+#include <atomic>
+#include <memory>
 #include <unordered_map>
 
 #include <nlohmann/json.hpp>
 
+#include <boost/thread.hpp>
+
 namespace Slic3r { namespace GUI {
 
 class GuideFrame : public DPIDialog
@@ -78,6 +82,11 @@ public:
     int LoadProfileData();
     int SaveProfileData();
     int LoadProfileFamily(std::string strVendor, std::string strFilePath);
+    void init_guide_paths();
+    void on_profile_loaded();
+    bool BuildProfileJson(const PresetBundle& bundle, bool require_all_resource_vendors);
+    bool BuildProfileDataFromPresetBundle();
+    bool BuildProfileDataFromVendors();
     int SaveProfile();
     int GetFilamentInfo( std::string VendorDirectory,json & pFilaList, std::string filepath, std::string &sVendor, std::string &sType);
 
@@ -112,8 +121,11 @@ private:
 
     //First Load
     bool bFirstComplete{false};
-    bool m_destroy{false};
-    boost::thread* m_load_task{ nullptr };
+    std::atomic<bool> m_destroy{false};
+    // Shared cancel token captured by CallAfter lambdas so they don't touch
+    // `this` after the destructor has run and the object is freed.
+    std::shared_ptr<std::atomic<bool>> m_cancel_token{std::make_shared<std::atomic<bool>>(false)};
+    std::unique_ptr<boost::thread> m_load_task;
 
     // User Config
     bool PrivacyUse;
@@ -123,6 +135,7 @@ private:
     bool InstallNetplugin;
     bool network_plugin_ready {false};
 
+    json m_ProfileJson;
     json m_OrcaFilaList;
     std::string m_OrcaFilaLibPath;