Add: leaves event logging for user server departures

- Log 'leaves' event when user leaves the server
- Shows user info and join date in log embed
- Add to available log events and default list

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/events/guildMemberRemove.ts

@@ -1,14 +1,47 @@
 import { Events, GuildMember, TextChannel, EmbedBuilder } from 'discord.js';
 
+async function sendLog(client: any, guildId: string, event: string, embed: EmbedBuilder) {
+    const DB = client.DB;
+    const settings: any = DB.get('SELECT log_events FROM guild_settings WHERE guild_id = ?', guildId);
+
+    if (!settings?.log_events) return;
+    const activeEvents = settings.log_events.split(',').filter(Boolean);
+    if (!activeEvents.includes(event)) return;
+
+    const logSettings: any = DB.get('SELECT log_channel FROM guild_settings WHERE guild_id = ?', guildId);
+    if (!logSettings?.log_channel) return;
+
+    const channel = client.guilds.cache.get(guildId)?.channels.cache.get(logSettings.log_channel);
+    if (!channel || !channel.isTextBased()) return;
+
+    try {
+        await (channel as any).send({ embeds: [embed] });
+    } catch (error) {
+        console.error(`[LOG] Error sending log (${event}):`, error);
+    }
+}
+
 export default {
     name: Events.GuildMemberRemove,
     async execute(member: GuildMember) {
         const DB = (member.client as any).DB;
         const guildId = member.guild.id;
 
+        // Log the leave event
+        const embed = new EmbedBuilder()
+            .setTitle('👋 User hat Server verlassen')
+            .setColor(0x95a5a6)
+            .addFields(
+                { name: 'User', value: `${member.user.tag} (<@${member.id}>)`, inline: true },
+                { name: 'Beitritt', value: member.joinedTimestamp ? `<t:${Math.floor(member.joinedTimestamp / 1000)}:R>` : 'Unbekannt', inline: true }
+            )
+            .setTimestamp();
+
+        await sendLog(member.client, guildId, 'leaves', embed);
+
+        // Send goodbye message if configured
         const settings: any = DB.get('SELECT * FROM guild_settings WHERE guild_id = ?', guildId);
 
-        // Use custom channel or fall back to Discord's system channel
         const channelId = settings?.welcome_channel || member.guild.systemChannelId;
         if (!channelId || !settings?.goodbye_message) {
             return;