feat(commands): add beta feature flag support to command system

- Add beta and featureFlag properties to Command interface
- Add beta access check in CommandHandler before command execution
- Show beta feature message to non-whitelisted users

bot/lib/handlers/CommandHandler.ts

@@ -1,6 +1,7 @@
 import { ChatInputCommandInteraction, MessageFlags } from "discord.js";
 import { AuroraClient } from "@/lib/BotClient";
 import { userService } from "@shared/modules/user/user.service";
+import { featureFlagsService } from "@shared/modules/feature-flags/feature-flags.service";
 import { createErrorEmbed } from "@lib/embeds";
 import { logger } from "@shared/lib/logger";
 
@@ -25,6 +26,37 @@ export class CommandHandler {
             return;
         }
 
+        // Check beta feature access
+        if (command.beta) {
+            const flagName = command.featureFlag || interaction.commandName;
+            let memberRoles: string[] = [];
+            
+            if (interaction.member && 'roles' in interaction.member) {
+                const roles = interaction.member.roles;
+                if (typeof roles === 'object' && 'cache' in roles) {
+                    memberRoles = [...roles.cache.keys()];
+                } else if (Array.isArray(roles)) {
+                    memberRoles = roles;
+                }
+            }
+            
+            const hasAccess = await featureFlagsService.hasAccess(flagName, {
+                guildId: interaction.guildId!,
+                userId: interaction.user.id,
+                memberRoles,
+            });
+
+            if (!hasAccess) {
+                const errorEmbed = createErrorEmbed(
+                    "This feature is currently in beta testing and not available to all users. " +
+                    "Stay tuned for the official release!",
+                    "Beta Feature"
+                );
+                await interaction.reply({ embeds: [errorEmbed], flags: MessageFlags.Ephemeral });
+                return;
+            }
+        }
+
         // Ensure user exists in database
         try {
             await userService.getOrCreateUser(interaction.user.id, interaction.user.username);

shared/lib/types.ts

@@ -7,6 +7,8 @@ export interface Command {
     execute: (interaction: ChatInputCommandInteraction) => Promise<void> | void;
     autocomplete?: (interaction: AutocompleteInteraction) => Promise<void> | void;
     category?: string;
+    beta?: boolean;
+    featureFlag?: string;
 }
 
 export interface Event<K extends keyof ClientEvents> {