feat: Introduce GameConfig to centralize constants for leveling, economy, and inventory, adding new transfer and inventory limits.

src/commands/economy/pay.ts

@@ -2,6 +2,7 @@ import { createCommand } from "@/lib/utils";
 import { SlashCommandBuilder, EmbedBuilder } from "discord.js";
 import { economyService } from "@/modules/economy/economy.service";
 import { userService } from "@/modules/user/user.service";
+import { GameConfig } from "@/config/game";
 
 export const pay = createCommand({
     data: new SlashCommandBuilder()
@@ -26,6 +27,11 @@ export const pay = createCommand({
         const senderId = interaction.user.id;
         const receiverId = targetUser.id;
 
+        if (amount < GameConfig.economy.transfers.minAmount) {
+            await interaction.editReply({ content: `❌ Amount must be at least ${GameConfig.economy.transfers.minAmount}.` });
+            return;
+        }
+
         if (senderId === receiverId) {
             await interaction.editReply({ content: "❌ You cannot pay yourself." });
             return;