优化，现有bug处理

internal/service/walk.go

@@ -14,14 +14,22 @@ type walkInfo struct {
 }
 
 // walk traverses root depth-first calling fn for every entry. Hidden
-// directories (starting with ".") are skipped.
+// directories (starting with ".") below the root are skipped.
+//
+// The root itself is deliberately exempt from the hidden-directory rule.
+// WalkDir reports the root with its own base name, so a root such as
+// "/media/.staging" used to match the hidden check and yield filepath.SkipDir
+// immediately — the entire tree was skipped silently, with no error and no
+// warning. A library or organize source may legitimately live in a
+// dot-prefixed directory, so only children are filtered.
 func walk(root string, fn func(string, walkInfo) error) error {
-	return filepath.WalkDir(root, func(path string, d fs.DirEntry, err error) error {
+	rootPath := filepath.Clean(root)
+	return filepath.WalkDir(rootPath, func(path string, d fs.DirEntry, err error) error {
 		if err != nil {
 			return nil // best effort — keep walking
 		}
 		name := d.Name()
-		if d.IsDir() && name != "." && len(name) > 1 && name[0] == '.' {
+		if d.IsDir() && path != rootPath && name != "." && len(name) > 1 && name[0] == '.' {
 			return filepath.SkipDir
 		}
 		info := walkInfo{isDir: d.IsDir()}