style: clean up code formatting and remove trailing whitespace

refactor: reorganize imports and fix type imports

lib/secure-logger.ts

@@ -29,7 +29,7 @@ interface MaskOptions {
   removeSensitive?: boolean;
 }
 
-const isProduction = process.env.NODE_ENV === "production";
+const _isProduction = process.env.NODE_ENV === "production";
 
 /**
  * Mascara email mantendo primeiro caractere e domínio
@@ -38,7 +38,7 @@ function maskEmail(email: string): string {
   if (!email || !email.includes("@")) return email;
 
   const [localPart, domain] = email.split("@");
-  const maskedLocal = localPart.substring(0, 1) + "***";
+  const maskedLocal = `${localPart.substring(0, 1)}***`;
 
   return `${maskedLocal}@${domain}`;
 }