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

src/commands/admin/webhook.ts

@@ -1,6 +1,7 @@
 import { createCommand } from "@/lib/utils";
 import { SlashCommandBuilder, PermissionFlagsBits, TextChannel, NewsChannel, VoiceChannel, MessageFlags } from "discord.js";
 import { createErrorEmbed } from "@/lib/embeds";
+import { sendWebhookMessage } from "@/lib/webhookUtils";
 
 export const webhook = createCommand({
     data: new SlashCommandBuilder()
@@ -36,37 +37,17 @@ export const webhook = createCommand({
             return;
         }
 
-        let webhook;
         try {
-            webhook = await channel.createWebhook({
-                name: `${interaction.client.user.username} - Proxy`,
-                avatar: interaction.client.user.displayAvatarURL(),
-                reason: `Proxy message requested by ${interaction.user.tag}`
-            });
-
-
-            // Support snake_case keys for raw API compatibility
-            if (payload.avatar_url && !payload.avatarURL) {
-                payload.avatarURL = payload.avatar_url;
-                delete payload.avatar_url;
-            }
-
-            await webhook.send(payload);
-
-            await webhook.delete("Proxy message sent");
+            await sendWebhookMessage(
+                channel,
+                payload,
+                interaction.client.user,
+                `Proxy message requested by ${interaction.user.tag}`
+            );
 
             await interaction.editReply({ content: "Message sent successfully!" });
         } catch (error) {
             console.error("Webhook error:", error);
-            // Attempt cleanup if webhook was created but sending failed
-            if (webhook) {
-                try {
-                    await webhook.delete("Cleanup after failure");
-                } catch (cleanupError) {
-                    console.error("Failed to delete webhook during cleanup:", cleanupError);
-                }
-            }
-
             await interaction.editReply({
                 embeds: [createErrorEmbed("Failed to send message via webhook. Ensure the bot has 'Manage Webhooks' permission and the payload is valid.", "Delivery Failed")]
             });