fix: normalize path separators for cross-platform gitignore matching

Co-authored-by: pan93412 <28441561+pan93412@users.noreply.github.com>

Author: Copilot

internal/util/pack.go

@@ -83,10 +83,11 @@ func PackZipWithoutGitIgnoreFiles() ([]byte, error) {
 
 		// Check ignore patterns before processing
 		if ignoreObject != nil {
+			// Normalize path separators to forward slashes for cross-platform gitignore matching
+			checkPath := filepath.ToSlash(path)
 			// For directories, we need to check with trailing slash for proper gitignore matching
-			checkPath := path
 			if info.IsDir() {
-				checkPath = path + "/"
+				checkPath = checkPath + "/"
 			}
 
 			if ignoreObject.MatchesPath(checkPath) {