refactor: update command tests to use require syntax and improve error handling

utils/command.js

@@ -34,7 +34,7 @@ export default class Command {
       this._logger.info(`Executing command: ${interaction.commandName}`);
       await this.run(interaction);
     } catch (error) {
-      this.handleError(interaction, error);
+      await this.handleError(interaction, error);
     }
   }
 
@@ -44,13 +44,13 @@ export default class Command {
   }
 
   // Standardized error handling
-  handleError(interaction, error) {
+  async handleError(interaction, error) {
     this._logger.error(`Command ${interaction.commandName} failed:`, error);
 
     const response = interaction.deferred ? 'followUp' : 'reply';
     const errorMessage = this.getErrorMessage(error);
 
-    interaction[response]({
+    await interaction[response]({
       content: errorMessage,
       ephemeral: true,
     });