Auto-fix executable permissions on discovered AppImages

src/ui/drop_dialog.rs

@@ -193,6 +193,19 @@ fn register_dropped_files(
         });
 
         let final_path = if in_scan_dir {
+            // Ensure executable even if already in scan dir
+            #[cfg(unix)]
+            {
+                use std::os::unix::fs::PermissionsExt;
+                if let Ok(meta) = std::fs::metadata(file) {
+                    if meta.permissions().mode() & 0o111 == 0 {
+                        let perms = std::fs::Permissions::from_mode(0o755);
+                        if let Err(e) = std::fs::set_permissions(file, perms) {
+                            log::warn!("Failed to set executable on {}: {}", file.display(), e);
+                        }
+                    }
+                }
+            }
             file.clone()
         } else {
             let filename = file