Ticket-System, Web-Composer und Nachrichten-Bearbeitung

- Tickets: /ticket-setup postet 🎫-Button; Klick erstellt privaten Thread
  (ein offenes Ticket pro User), Schließen-Button sperrt + archiviert
- Composer auf der Setup-Seite: Nachricht/Embed als Bot in beliebigen Kanal
  senden oder per Message-ID bearbeiten (nur eigene Bot-Posts)
- API v1: PATCH /api/v1/message — Skripte können ihre Bot-Posts aktualisieren
- Setting ticket_channel_id; README ergänzt

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

src/web/api.js

@@ -212,6 +212,7 @@ ${rssItems}
             modlog_channel_id: getSetting('modlog_channel_id') ?? '',
             status_channel_id: getSetting('status_channel_id') ?? '',
             voting_channel_id: getSetting('voting_channel_id') ?? '',
+            ticket_channel_id: getSetting('ticket_channel_id') ?? '',
             gameservers: getSetting('gameservers') ?? '',
         };
     }
@@ -244,7 +245,7 @@ ${rssItems}
         const OPTIONAL_CHANNELS = [
             'release_channel_id', 'backup_channel_id', 'starboard_channel_id',
             'screenshot_channel_id', 'modmail_channel_id', 'welcome_channel_id',
-            'modlog_channel_id', 'status_channel_id', 'voting_channel_id',
+            'modlog_channel_id', 'status_channel_id', 'voting_channel_id', 'ticket_channel_id',
         ];
         for (const key of ['commit_channel_id', 'devlog_channel_id', ...OPTIONAL_CHANNELS]) {
             if (body[key] === undefined) continue;
@@ -312,6 +313,51 @@ ${rssItems}
         return { ok: true, settings: currentSettings() };
     });
 
+    // Composer (Admin): Nachricht/Embed als Bot senden oder eigene Posts bearbeiten
+    app.post('/api/compose', async (request, reply) => {
+        if (requireAdmin(request, reply)) return;
+
+        const { channel_id: channelId, message_id: messageId, content, embed_title: embedTitle } = request.body ?? {};
+        const text = String(content ?? '').trim();
+        if (!channelId || !text) {
+            return reply.code(400).send({ error: 'channel_id und content nötig' });
+        }
+        const channel = await client.channels.fetch(String(channelId)).catch(() => null);
+        if (!channel?.isTextBased()) {
+            return reply.code(404).send({ error: 'Kanal nicht gefunden' });
+        }
+
+        // Mit Embed-Titel → gebrandetes Embed, sonst Plaintext (Discord-Markdown)
+        const payload = embedTitle?.trim()
+            ? {
+                content: null,
+                embeds: [
+                    new EmbedBuilder()
+                        .setColor(0xf5c518)
+                        .setTitle(String(embedTitle).slice(0, 200))
+                        .setDescription(text.slice(0, 4000))
+                        .setFooter({ text: 'D4RKST3R' })
+                        .setTimestamp(),
+                ],
+            }
+            : { content: text.slice(0, 2000), embeds: [] };
+
+        if (messageId) {
+            const message = await channel.messages.fetch(String(messageId)).catch(() => null);
+            if (!message) return reply.code(404).send({ error: 'Nachricht nicht gefunden' });
+            if (message.author?.id !== client.user?.id) {
+                return reply.code(403).send({ error: 'Nur eigene Bot-Nachrichten sind editierbar' });
+            }
+            await message.edit(payload);
+            request.log.info(`Composer: Nachricht ${messageId} bearbeitet`);
+            return { ok: true, edited: true, message_id: String(messageId) };
+        }
+
+        const message = await channel.send(payload);
+        request.log.info(`Composer: Nachricht ${message.id} gesendet`);
+        return { ok: true, edited: false, message_id: message.id };
+    });
+
     // --- API-Keys (Admin) — für /api/v1/* ---
 
     const VALID_SCOPES = ['message', 'dm', 'roles', 'read'];