improve ui

src-tauri/src/lib.rs

@@ -110,6 +110,7 @@ struct ZcaResult {
 #[derive(serde::Deserialize)]
 struct ExportImageTask {
     path: String,
+    output_filename: Option<String>,
     manual_position: Option<ManualPosition>,
     scale: Option<f64>,
     opacity: Option<f64>,
@@ -251,7 +252,12 @@ async fn export_batch(images: Vec<ExportImageTask>, watermark: WatermarkSettings
             } // END IF MODE == ADD
 
             // Save
-            let file_name = input_path.file_name().unwrap_or_default();
+            // Prioritize explicitly provided output filename (from original path), fall back to input filename
+            let file_name = match &task.output_filename {
+                Some(name) => std::ffi::OsStr::new(name),
+                None => input_path.file_name().unwrap_or_default()
+            };
+            let output_path = Path::new(&output_dir).join(file_name);
             let output_path = Path::new(&output_dir).join(file_name);
             
             // Handle format specific saving