feat: update capabilities and add clipboard image reading functionality for Linux

- Updated capabilities.json to allow opening shell commands.
- Implemented read_clipboard_image function for Linux using arboard to read images from the clipboard and encode them as base64 PNG.
- Added a stub for read_clipboard_image on non-Linux platforms.
- Registered the new command in the Tauri application.

src-tauri/src/lib.rs

@@ -3,6 +3,44 @@
 #[cfg(mobile)]
 mod mobile;
 
+/// Read image from clipboard on Linux using arboard with Wayland support
+#[cfg(target_os = "linux")]
+#[tauri::command]
+fn read_clipboard_image() -> Result<Option<String>, String> {
+    use arboard::Clipboard;
+    use base64::{Engine as _, engine::general_purpose::STANDARD as BASE64};
+    
+    let mut clipboard = Clipboard::new().map_err(|e| e.to_string())?;
+    
+    match clipboard.get_image() {
+        Ok(img) => {
+            // Convert RGBA image data to PNG
+            let width = img.width as u32;
+            let height = img.height as u32;
+            
+            let mut png_data = Vec::new();
+            {
+                let mut encoder = png::Encoder::new(&mut png_data, width, height);
+                encoder.set_color(png::ColorType::Rgba);
+                encoder.set_depth(png::BitDepth::Eight);
+                let mut writer = encoder.write_header().map_err(|e| e.to_string())?;
+                writer.write_image_data(&img.bytes).map_err(|e| e.to_string())?;
+            }
+            
+            let base64_data = BASE64.encode(&png_data);
+            Ok(Some(format!("data:image/png;base64,{}", base64_data)))
+        }
+        Err(_) => Ok(None), // No image in clipboard
+    }
+}
+
+/// Stub for non-Linux platforms - returns None
+#[cfg(not(target_os = "linux"))]
+#[tauri::command]
+fn read_clipboard_image() -> Result<Option<String>, String> {
+    Ok(None)
+}
+
 /// Runs the Tauri application
 pub fn run() {
     #[cfg(not(any(target_os = "android", target_os = "ios")))]
@@ -15,6 +53,7 @@ pub fn run() {
             .plugin(tauri_plugin_single_instance::init(|_app, _args, _cwd| {}))
             .plugin(tauri_plugin_notification::init())
             .plugin(tauri_plugin_updater::Builder::new().build())
+            .invoke_handler(tauri::generate_handler![read_clipboard_image])
             .run(tauri::generate_context!())
             .expect("error while building tauri application");
     }
@@ -25,6 +64,7 @@ pub fn run() {
             .plugin(tauri_plugin_shell::init())
             .plugin(tauri_plugin_notification::init())
             .plugin(tauri_plugin_deep_link::init())
+            .invoke_handler(tauri::generate_handler![read_clipboard_image])
             .run(tauri::generate_context!())
             .expect("error while building tauri application");
     }