Introducing Orca Cloud: https://cloud.orcaslicer.com (#13414)

* Add OrcaCloud sync platform and preset bundle sharing system

  Introduce OrcaCloud, a cloud sync platform for user presets, alongside
  a preset bundle system that enables sharing printer/filament/process
  profiles as local exportable bundles or subscribed cloud bundles.

  OrcaCloud platform:
  - Auth to Orca Cloud
  - Encrypted token storage (file-based or system keychain)
  - User preset sync with
  - Profile migration from default/bambu folders on first login
  - Homepage integration with entrance to cloud.orcaslicer.com

  Preset bundles:
  - Local bundle import/export with bundle_structure.json metadata
  - Subscribed cloud bundles with version-based update checking
  - Thread-safe concurrent bundle access with read-write mutex
  - Canonical bundle preset naming (_local/<id>/... and _subscribed/<id>/...)
  - Bundle presets are read-only; grouped under subheaders in combo boxes
  - PresetBundleDialog with auto-sync toggle, refresh, update notifications
  - Hyperlinked bundle names to cloud bundle pages

  Co-authored-by: Sabriel Koh <sabrielkcr@gmail.com>
  Co-authored-by: Derrick <derrick992110@gmail.com>
  Co-authored-by: Mykola Nahirnyi <mnahirnyi@amcbridge.com>
  Co-authored-by: Ian Chua <iancrb00@gmail.com>
  Co-authored-by: Draginraptor <draginraptor@gmail.com>
  Co-authored-by: ExPikaPaka <112851715+ExPikaPaka@users.noreply.github.com>
  Co-authored-by: Ian Bassi <ian.bassi@outlook.com>
  Co-authored-by: Ocraftyone <Ocraftyone@users.noreply.github.com>
  Co-authored-by: yw4z <ywsyildiz@gmail.com>
  Co-authored-by: peterm-m <101202951+peterm-m@users.noreply.github.com>

* Fixed an issue on Windows it failed to login Orca Cloud with Google account

src/slic3r/Utils/NetworkAgentFactory.hpp

@@ -14,15 +14,6 @@
 #include <vector>
 
 namespace Slic3r {
-
-/**
- * CloudAgentProvider - Specifies which implementation to use for each agent type.
- *
- * - Orca: Native Orca cloud implementations (OrcaCloudServiceAgent)
- * - BBL: BBL DLL wrapper implementations (BBLCloudServiceAgent)
- */
-enum class CloudAgentProvider { Orca, BBL };
-
 static constexpr char ORCA_PRINTER_AGENT_ID[] = "orca";
 static constexpr char BBL_PRINTER_AGENT_ID[] = "bbl";
 
@@ -137,11 +128,11 @@ public:
      * @param log_dir Directory for log files
      * @return Shared pointer to ICloudServiceAgent implementation
      */
-    static std::shared_ptr<ICloudServiceAgent> create_cloud_agent(CloudAgentProvider provider, const std::string& log_dir)
+    static std::shared_ptr<ICloudServiceAgent> create_cloud_agent(const std::string& provider, const std::string& log_dir)
     {
-        switch (provider) {
-        case CloudAgentProvider::Orca: return std::make_shared<OrcaCloudServiceAgent>(log_dir);
-        case CloudAgentProvider::BBL: {
+        if (provider == ORCA_CLOUD_PROVIDER) {
+            return std::make_shared<OrcaCloudServiceAgent>(log_dir);
+        } else if (provider == BBL_CLOUD_PROVIDER) {
             auto& plugin = BBLNetworkPlugin::instance();
             if (!plugin.is_loaded()) {
                 return nullptr;
@@ -154,8 +145,7 @@ public:
             }
             return std::make_shared<BBLCloudServiceAgent>();
         }
-        default: return nullptr;
-        }
+        return nullptr;
     }
 
 private:
@@ -172,9 +162,9 @@ private:
  * Creates a NetworkAgent with cloud agent only. The printer agent is created
  * separately when a printer is selected, via create_printer_agent_by_id().
  *
- * Cloud provider selection:
- *   - use_orca_cloud=true  → OrcaCloudServiceAgent (default)
- *   - use_orca_cloud=false → BBLCloudServiceAgent (requires plugin)
+ * Cloud provider: Always creates OrcaCloudServiceAgent as the primary provider.
+ * Third-party cloud agents (e.g., Bambu) are created from the cloud_providers
+ * AppConfig setting and added via NetworkAgent::add_cloud_agent().
  *
  * @param log_dir Directory for log files
  * @param app_config Application configuration object