fix: allow notebook to be a hidden dir

internal/core/note_index.go

@@ -150,7 +150,8 @@ func (t *indexTask) execute(callback func(change paths.DiffChange)) (NoteIndexin
 		return false, nil
 	}
 
-	source := paths.Walk(t.path, t.logger, shouldIgnorePath)
+    notebookPath := &NotebookPath{Path: t.path}
+	source := paths.Walk(t.path, t.logger, notebookPath.Filename(), shouldIgnorePath)
 
 	target, err := t.index.IndexedPaths()
 	if err != nil {

internal/util/paths/walk.go

@@ -10,7 +10,7 @@ import (
 
 // Walk emits the metadata of each file stored in the directory if they pass
 // the given shouldIgnorePath closure. Hidden files and directories are ignored.
-func Walk(basePath string, logger util.Logger, shouldIgnorePath func(string) (bool, error)) <-chan Metadata {
+func Walk(basePath string, logger util.Logger, notebookRoot string, shouldIgnorePath func(string) (bool, error)) <-chan Metadata {
 	c := make(chan Metadata, 50)
 	go func() {
 		defer close(c)
@@ -22,9 +22,10 @@ func Walk(basePath string, logger util.Logger, shouldIgnorePath func(string) (bo
 
 			filename := info.Name()
 			isHidden := strings.HasPrefix(filename, ".")
+			isNotebookRoot := filename == notebookRoot
 
 			if info.IsDir() {
-				if isHidden {
+				if isHidden && !isNotebookRoot {
 					return filepath.SkipDir
 				}