add setup wizard, lockdown, team tasks, embed builder; fix admin dashboard

Four new independent features: /setup (guided onboarding wizard for
module/channel/automod-strength config), /lockdown (raid protection with
per-channel permission snapshot/restore and join-kick), /task (staff task
tracker with status buttons + dashboard view), /embed create (modal-driven
embed builder with optional link button). Also fixes the Admin dashboard,
which always showed "-" because loadAdminData() double-wrapped the overview
response and discarded activity data, plus mismatched field names against
adminService's actual shape (guildCount/activeGuilds24/uptimeMs).

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

frontend/src/pages/Tasks.tsx

@@ -0,0 +1,80 @@
+import { Card, CardContent, CardHeader, Input, TextArea, Button, Chip, TextField, Label } from '@heroui/react';
+import { ListChecks, Trash2, Plus } from 'lucide-react';
+import { useApp } from '../context/AppContext';
+import { SectionCard } from '../components/shared/SectionCard';
+import { formatDate } from '../utils/formatters';
+
+const STATUS_LABELS: Record<string, string> = { open: 'Offen', in_progress: 'In Bearbeitung', done: 'Erledigt' };
+const STATUS_COLORS: Record<string, 'warning' | 'accent' | 'success'> = { open: 'warning', in_progress: 'accent', done: 'success' };
+
+export function Tasks() {
+  const { tasks, taskDraft, setTaskDraft, createTask, updateTaskStatus, deleteTask } = useApp();
+
+  return (
+    <SectionCard title="Team-Aufgaben" subtitle="Aufgaben für dein Team erstellen und Status pflegen.">
+      <div className="grid gap-5 xl:grid-cols-[1fr_360px]">
+        <div>
+          <h3 className="mb-3 text-base font-semibold">Aufgaben ({tasks.length})</h3>
+          <div className="space-y-3">
+            {tasks.length ? tasks.map((t) => (
+              <Card key={t.id}>
+                <CardContent className="flex flex-col gap-3 p-4">
+                  <div className="flex items-center justify-between gap-2">
+                    <div className="min-w-0">
+                      <div className="font-semibold truncate">{t.title}</div>
+                      <div className="text-xs text-muted">von {t.createdByTag} · {formatDate(t.createdAt)}</div>
+                    </div>
+                    <Button isIconOnly size="sm" variant="danger-soft" onPress={() => deleteTask(t.id)}>
+                      <Trash2 size={14} />
+                    </Button>
+                  </div>
+                  {t.description && <p className="text-sm text-muted">{t.description}</p>}
+                  <div className="flex flex-wrap items-center gap-2">
+                    <select
+                      className="rounded-xl px-3 py-2 text-sm"
+                      value={t.status}
+                      onChange={(e) => updateTaskStatus(t.id, e.target.value)}
+                    >
+                      <option value="open">Offen</option>
+                      <option value="in_progress">In Bearbeitung</option>
+                      <option value="done">Erledigt</option>
+                    </select>
+                    <Chip size="sm" variant="soft" color={STATUS_COLORS[t.status] || 'warning'}>
+                      {STATUS_LABELS[t.status] || t.status}
+                    </Chip>
+                    {t.assigneeId && <span className="text-xs text-muted">Zugewiesen an User-ID {t.assigneeId}</span>}
+                  </div>
+                </CardContent>
+              </Card>
+            )) : (
+              <div className="flex flex-col items-center gap-2 py-8 text-center text-sm text-muted">
+                <ListChecks size={24} />
+                Keine Aufgaben
+              </div>
+            )}
+          </div>
+        </div>
+
+        <Card>
+          <CardHeader className="px-5 pt-5 pb-0">
+            <h3 className="text-base font-semibold">Neue Aufgabe</h3>
+          </CardHeader>
+          <CardContent className="flex flex-col gap-4 p-5">
+            <TextField>
+              <Label>Titel</Label>
+              <Input value={taskDraft.title} onChange={(e) => setTaskDraft((s) => ({ ...s, title: e.target.value }))} />
+            </TextField>
+            <TextField>
+              <Label>Beschreibung</Label>
+              <TextArea rows={4} value={taskDraft.description} onChange={(e) => setTaskDraft((s) => ({ ...s, description: e.target.value }))} />
+            </TextField>
+            <p className="text-xs text-muted">Eine zuständige Person lässt sich aktuell nur über <code>/task create</code> in Discord zuweisen.</p>
+            <Button variant="primary" onPress={createTask} isDisabled={!taskDraft.title.trim()}>
+              <Plus size={16} /> Aufgabe erstellen
+            </Button>
+          </CardContent>
+        </Card>
+      </div>
+    </SectionCard>
+  );
+}