Bug-Reports, Devlog-Threads und Watchdog

- /bug (alle Member): erstellt Gitea-Issue inkl. Screenshot-Upload als Asset;
  bug_reports-Tabelle für den Rückkanal — Issue geschlossen (issues-Webhook)
  → DM an den Reporter
- Auto-Thread '💬 Devlog <Datum>' unter jedem Devlog-Post (Setting, Default an)
- Watchdog: prüft Setting watchdog_urls alle 2 min, DM an Admin nach 2 Fails
  in Folge + Entwarnung mit Downtime-Dauer
- Setup-Seite: Bug-Repo, Threads-Toggle, Watchdog-URLs; Env GITEA_API_TOKEN/GITEA_URL

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

src/web/devlog-endpoint.js

@@ -10,7 +10,7 @@ import { join } from 'node:path';
 import { ActionRowBuilder, AttachmentBuilder, ButtonBuilder, ButtonStyle, EmbedBuilder } from 'discord.js';
 import { config } from '../config.js';
 import { saveDevlog } from '../db.js';
-import { devlogChannelId, devlogPingRoleId } from '../runtime-settings.js';
+import { devlogChannelId, devlogPingRoleId, devlogThreadsEnabled } from '../runtime-settings.js';
 import { imagesDir } from '../bot/devlog-archive.js';
 
 const BRAND_YELLOW = 0xf5c518;
@@ -154,6 +154,21 @@ export function registerDevlogEndpoint(app, client) {
                 : {}),
         });
 
+        // Diskussions-Thread unterm Devlog (Fehler nicht fatal — z. B. fehlende Rechte)
+        if (devlogThreadsEnabled() && typeof message.startThread === 'function') {
+            try {
+                const threadDate = new Intl.DateTimeFormat('de-DE', {
+                    day: '2-digit', month: '2-digit',
+                }).format(new Date());
+                await message.startThread({
+                    name: `💬 Devlog ${threadDate}`,
+                    autoArchiveDuration: 4320, // 3 Tage
+                });
+            } catch (error) {
+                request.log.warn(`Devlog-Thread fehlgeschlagen: ${error.message}`);
+            }
+        }
+
         // Direkt archivieren (der Live-Listener ignoriert eigene Bot-Posts bewusst)
         const imageFiles = [];
         for (const [i, f] of files.entries()) {