fix(cp): use target file mode for symlinks when following links

When copying directories with followLinks=true, symlinks show 0777 mode
but that's not the target file's actual permissions. Now we pass mode=0
for followed symlinks so CpToInstance auto-detects from the target via os.Stat.

Author: rgarcia

lib/cp.go

@@ -348,13 +348,23 @@ func copyDirToWs(ctx context.Context, cfg CpConfig, ws WsConn, srcPath, dstPath,
 			return fmt.Errorf("info: %w", err)
 		}
 
+		// Determine the mode to use
+		// For symlinks: if following links, let CpToInstance auto-detect from target
+		// (symlinks show 0777 but that's not the target's actual mode)
+		var mode fs.FileMode
+		if info.Mode()&fs.ModeSymlink != 0 && followLinks {
+			mode = 0 // Let CpToInstance use os.Stat to get target's mode
+		} else {
+			mode = info.Mode().Perm()
+		}
+
 		// For each file/dir, we need a new WebSocket connection
 		// This is because the protocol is one-file-per-connection
 		return CpToInstance(ctx, cfg, CpToInstanceOptions{
 			InstanceID:  instanceID,
 			SrcPath:     walkPath,
 			DstPath:     targetPath,
-			Mode:        info.Mode().Perm(),
+			Mode:        mode,
 			Archive:     archive,
 			FollowLinks: followLinks,
 			Dialer:      dialer,