Refine RemoteFileMultiInfo error handling and dedup behavior

Co-authored-by: sawka <2722291+sawka@users.noreply.github.com>

Author: Copilot

frontend/types/gotypes.d.ts

@@ -882,6 +882,7 @@ declare global {
         path: string;
         dir?: string;
         name?: string;
+        staterror?: string;
         notfound?: boolean;
         opts?: FileOpts;
         size?: number;

pkg/wshrpc/wshremote/wshremote_file.go

@@ -524,13 +524,26 @@ func (impl *ServerImpl) RemoteFileMultiInfoCommand(ctx context.Context, data wsh
 	cwd = filepath.Clean(wavebase.ExpandHomeDirSafe(cwd))
 	rtn := make(map[string]wshrpc.FileInfo, len(data.Paths))
 	for _, path := range data.Paths {
+		if _, found := rtn[path]; found {
+			continue
+		}
+		if ctx.Err() != nil {
+			return nil, ctx.Err()
+		}
 		cleanedPath := wavebase.ExpandHomeDirSafe(path)
 		if !filepath.IsAbs(cleanedPath) {
 			cleanedPath = filepath.Join(cwd, cleanedPath)
 		}
 		fileInfo, err := impl.fileInfoInternal(cleanedPath, false)
 		if err != nil {
-			return nil, err
+			rtn[path] = wshrpc.FileInfo{
+				Path:          wavebase.ReplaceHomeDir(cleanedPath),
+				Dir:           computeDirPart(cleanedPath),
+				Name:          filepath.Base(cleanedPath),
+				StatError:     err.Error(),
+				SupportsMkdir: true,
+			}
+			continue
 		}
 		rtn[path] = *fileInfo
 	}

pkg/wshrpc/wshremote/wshremote_file_test.go

@@ -57,6 +57,7 @@ type FileInfo struct {
 	Path          string      `json:"path"`          // cleaned path (may have "~")
 	Dir           string      `json:"dir,omitempty"` // returns the directory part of the path (if this is a a directory, it will be equal to Path).  "~" will be expanded, and separators will be normalized to "/"
 	Name          string      `json:"name,omitempty"`
+	StatError     string      `json:"staterror,omitempty"`
 	NotFound      bool        `json:"notfound,omitempty"`
 	Opts          *FileOpts   `json:"opts,omitempty"`
 	Size          int64       `json:"size,omitempty"`