Splash: borderless+transparent+launcher-dedup, idle-dispatch hide

launcher/src-tauri/src/lib.rs

@@ -294,6 +294,13 @@ fn plugin_loaded_marker_path() -> PathBuf {
     dossier_dir().join("plugin_loaded.flag")
 }
 
+fn splash_owner_marker_path() -> PathBuf {
+    // Vor Launch von Rhino schreibt Launcher diesen Marker → Plugin-Splash
+    // (rhino/_startup_splash.py) prueft beim Show ob Marker frisch (<30s)
+    // ist und skippt dann, damit nicht beide Splashes gleichzeitig laufen.
+    dossier_dir().join("splash_owner_launcher.flag")
+}
+
 fn open_rhino_internal(app: &tauri::AppHandle, path3dm: &str) -> Result<(), String> {
     let settings = load_settings();
     // XML-Edit nur sinnvoll wenn Rhino nicht laeuft (sonst ueberschreibt's
@@ -314,8 +321,11 @@ fn open_rhino_internal(app: &tauri::AppHandle, path3dm: &str) -> Result<(), Stri
     // Splash NUR zeigen wenn Auto-Load aktiv (sonst gibt's nichts zu warten).
     let show_splash = settings.auto_load_plugin;
     let marker = plugin_loaded_marker_path();
+    let owner_marker = splash_owner_marker_path();
     if show_splash {
         let _ = fs::remove_file(&marker);
+        // Owner-Marker: signalisiert dem Plugin-Splash dass Launcher uebernimmt
+        let _ = fs::write(&owner_marker, b"launcher");
         if let Some(splash) = app.get_webview_window("splash") {
             let _ = splash.show();
         }
@@ -344,6 +354,7 @@ fn open_rhino_internal(app: &tauri::AppHandle, path3dm: &str) -> Result<(), Stri
                 std::thread::sleep(std::time::Duration::from_millis(250));
             }
             let _ = fs::remove_file(&marker);
+            let _ = fs::remove_file(&owner_marker);
             if let Some(splash) = app_clone.get_webview_window("splash") {
                 let _ = splash.hide();
             }