feat: Implement welcome messages for new enrollments using a new webhook utility and refactor the admin webhook command to utilize it.

src/modules/user/enrollment.interaction.ts

@@ -3,6 +3,7 @@ import { config } from "@/lib/config";
 import { createErrorEmbed } from "@/lib/embeds";
 import { classService } from "@modules/class/class.service";
 import { userService } from "@modules/user/user.service";
+import { sendWebhookMessage } from "@/lib/webhookUtils";
 
 export async function handleEnrollmentInteraction(interaction: ButtonInteraction) {
     if (!interaction.inCachedGuild()) {
@@ -84,6 +85,31 @@ export async function handleEnrollmentInteraction(interaction: ButtonInteraction
             flags: MessageFlags.Ephemeral
         });
 
+        // 5. Send Welcome Message (if configured)
+        if (config.welcomeChannelId) {
+            const welcomeChannel = interaction.guild.channels.cache.get(config.welcomeChannelId);
+            if (welcomeChannel && welcomeChannel.isTextBased()) {
+                const rawMessage = config.welcomeMessage || "Welcome to Aurora, {user}! You have been enrolled as a **{class}**.";
+
+                const processedMessage = rawMessage
+                    .replace(/{user}/g, member.toString())
+                    .replace(/{username}/g, member.user.username)
+                    .replace(/{class}/g, selectedClass.name)
+                    .replace(/{guild}/g, interaction.guild.name);
+
+                let payload;
+                try {
+                    payload = JSON.parse(processedMessage);
+                } catch {
+                    payload = processedMessage;
+                }
+
+                // Fire and forget webhook
+                sendWebhookMessage(welcomeChannel, payload, interaction.client.user, "New Student Enrollment")
+                    .catch((err: any) => console.error("Failed to send welcome message:", err));
+            }
+        }
+
     } catch (error) {
         console.error("Enrollment error:", error);
         await interaction.reply({