fix(lint): remove trailing whitespace in copyFile function

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Co-Authored-By: Claude <noreply@anthropic.com>

Author: starbops

cmd/api/main.go

@@ -249,12 +249,11 @@ func copyFile(src, dst string) error {
 	// Validate and clean paths to prevent directory traversal
 	cleanSrc := filepath.Clean(src)
 	cleanDst := filepath.Clean(dst)
-	
+
 	// Additional security check: ensure paths don't contain ".." or other suspicious patterns
 	if !filepath.IsAbs(cleanSrc) || !filepath.IsAbs(cleanDst) {
 		return fmt.Errorf("paths must be absolute")
 	}
-	
 	// #nosec G304 - Path traversal mitigation: paths are validated and cleaned above
 	sourceFile, err := os.Open(cleanSrc)
 	if err != nil {