Complete private authentication, server integrations and activity reporting

Add Fabric/Forge version builds and Paper integration, preserve permanent player identities across renames, harden session authorization, and surface privacy-conscious launcher/server activity in the panel.

launcher/src-tauri/src/lib.rs

@@ -7,6 +7,7 @@ mod game;
 mod secrets;
 mod settings;
 mod state;
+mod telemetry;
 mod updater;
 
 use tauri::Manager;
@@ -46,6 +47,7 @@ pub fn run() {
         })
         .invoke_handler(tauri::generate_handler![
             commands::bootstrap,
+            commands::record_activity,
             commands::refresh_manifest,
             commands::set_panel_url,
             commands::save_settings,
@@ -57,6 +59,7 @@ pub fn run() {
             commands::set_skin_model,
             commands::delete_skin,
             commands::set_cape,
+            commands::set_username,
             commands::select_account,
             commands::remove_account,
             commands::launch,