feat(admin): bug-report toggle, unify "Trennen" button styling

Bucket E+F of the v1.4.3 polish pass.

**Disconnect-button styling unified.** Three integrations had three
different "Trennen" buttons: Withings used `outline` + `text-
destructive`; moodLog used solid `destructive` (red bg, white text);
the AI/Codex card used `ghost` + `text-destructive`. Same action,
three readings — confusing. All three now use the Withings pattern
(`outline` + `text-destructive`). The actual confirmation button
inside the AlertDialog keeps its solid-red treatment so the final
"yes, do it" still reads as a strong commit.

**Bug-report explicit on/off toggle.** Until v1.4.3 the bug-report
feature was implicitly gated on "is the GitHub token + repo
configured". An admin who wanted to *temporarily* hide the report
button (e.g. during a freeze window) had to clear the encrypted
token, forcing re-entry on resume — destructive for a reversible
intent. Migration `0027_bug_report_enabled_toggle` adds
`app_settings.bug_report_enabled BOOLEAN NOT NULL DEFAULT TRUE`,
the admin settings schema accepts `bugReportEnabled`, and a Switch
in the admin → Bug Report card lets the operator flip it.
`POST /api/bugreport` now returns 503 ("Bug reports are disabled by
the administrator") when the flag is off — the client already
renders a "not configured" screen on that status, so the report
button hides gracefully without further client-side wiring.

i18n keys added: `admin.bugReportEnabledLabel` + `…Description` in
both DE and EN.

Tests + typecheck green (671/671).

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

src/components/admin/_shared.tsx

@@ -70,6 +70,7 @@ export interface AdminSettings {
   glitchtipEnvironment: string | null;
   bugReportRepo: string | null;
   bugReportConfigured: boolean;
+  bugReportEnabled: boolean;
   reminderLateMinutes: number;
   reminderMissedMinutes: number;
 }

src/components/admin/bug-report-section.tsx

@@ -6,6 +6,7 @@ import { Badge } from "@/components/ui/badge";
 import { Button } from "@/components/ui/button";
 import { Input } from "@/components/ui/input";
 import { Label } from "@/components/ui/label";
+import { Switch } from "@/components/ui/switch";
 import { useTranslations } from "@/lib/i18n/context";
 import { PasswordInput, useAdminSettings, useUpdateSettings } from "./_shared";
 
@@ -21,6 +22,7 @@ export function BugReportSection({ id }: { id: string }) {
   const bugReportRepoValue =
     bugReportRepoDraft ?? settings?.bugReportRepo ?? "";
   const configured = settings?.bugReportConfigured ?? false;
+  const enabled = settings?.bugReportEnabled ?? true;
 
   function saveBugReportSettings() {
     const payload: Record<string, unknown> = {
@@ -38,6 +40,10 @@ export function BugReportSection({ id }: { id: string }) {
     });
   }
 
+  function toggleEnabled(next: boolean) {
+    updateSettings.mutate({ bugReportEnabled: next });
+  }
+
   return (
     <div
       id={id}
@@ -62,6 +68,23 @@ export function BugReportSection({ id }: { id: string }) {
         {t("admin.bugReportGithubDescription")}
       </p>
 
+      <div className="bg-muted/40 mt-4 flex items-center justify-between gap-3 rounded-lg p-3">
+        <div>
+          <p className="text-sm font-medium">
+            {t("admin.bugReportEnabledLabel")}
+          </p>
+          <p className="text-muted-foreground text-xs">
+            {t("admin.bugReportEnabledDescription")}
+          </p>
+        </div>
+        <Switch
+          checked={enabled}
+          onCheckedChange={toggleEnabled}
+          disabled={updateSettings.isPending}
+          aria-label={t("admin.bugReportEnabledLabel")}
+        />
+      </div>
+
       <div className="mt-4 grid gap-3 sm:grid-cols-2">
         <div className="space-y-1.5">
           <Label htmlFor="admin-bugreport-repo" className="text-xs">