fix(logger): Replace direct console logging with unified logger interface for consistent formatting

ts/logger.ts

@@ -4,6 +4,7 @@
  */
 export class Logger {
   private currentBoxWidth: number | null = null;
+  private static instance: Logger;
 
   /**
    * Creates a new Logger instance
@@ -12,6 +13,17 @@ export class Logger {
     this.currentBoxWidth = null;
   }
 
+  /**
+   * Get the singleton logger instance
+   * @returns The singleton logger instance
+   */
+  public static getInstance(): Logger {
+    if (!Logger.instance) {
+      Logger.instance = new Logger();
+    }
+    return Logger.instance;
+  }
+
   /**
    * Log a message
    * @param message Message to log
@@ -129,4 +141,7 @@ export class Logger {
   public logDivider(width: number, character: string = '─'): void {
     console.log(character.repeat(width));
   }
-}
+}
+
+// Export a singleton instance for easy use
+export const logger = Logger.getInstance();