Rename fs variable

server/internal/handlers/handlers.go

@@ -10,14 +10,14 @@ import (
 // Handler provides common functionality for all handlers
 type Handler struct {
 	DB *db.DB
-	FS *filesystem.Storage
+	S  *filesystem.Storage
 }
 
 // NewHandler creates a new handler with the given dependencies
 func NewHandler(db *db.DB, fs *filesystem.Storage) *Handler {
 	return &Handler{
 		DB: db,
-		FS: fs,
+		S:  fs,
 	}
 }