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/gitea-api.js

@@ -0,0 +1,38 @@
+// Minimaler Gitea-API-Client (Token-Auth) — für /bug → Issues
+import { config } from './config.js';
+
+function headers(extra = {}) {
+    return {
+        Authorization: `token ${config.giteaApiToken}`,
+        Accept: 'application/json',
+        ...extra,
+    };
+}
+
+/** Issue anlegen; gibt { number, html_url } zurück */
+export async function createIssue(repo, title, body) {
+    const res = await fetch(`${config.giteaUrl}/api/v1/repos/${repo}/issues`, {
+        method: 'POST',
+        headers: headers({ 'Content-Type': 'application/json' }),
+        body: JSON.stringify({ title, body }),
+    });
+    if (!res.ok) {
+        throw new Error(`Gitea createIssue ${res.status}: ${(await res.text()).slice(0, 200)}`);
+    }
+    const issue = await res.json();
+    return { number: issue.number, html_url: issue.html_url };
+}
+
+/** Datei (z. B. Screenshot) als Issue-Attachment hochladen */
+export async function uploadIssueAsset(repo, issueNumber, filename, buffer) {
+    const form = new FormData();
+    form.append('attachment', new Blob([buffer]), filename);
+    const res = await fetch(
+        `${config.giteaUrl}/api/v1/repos/${repo}/issues/${issueNumber}/assets?name=${encodeURIComponent(filename)}`,
+        { method: 'POST', headers: headers(), body: form }
+    );
+    if (!res.ok) {
+        throw new Error(`Gitea uploadIssueAsset ${res.status}`);
+    }
+    return res.json();
+}