feat: wire 10 dead buttons across 6 modules to their server actions

Every module had buttons that rendered visually but did nothing when
clicked. Server actions existed for all of them. Created client
components with dialogs/forms and wired them in.

BOOKINGS MODULE:
- BookingStatusActions: Check-in/Check-out/Cancel buttons now call
  updateBookingStatus server action with loading states + toast
- CreateRoomDialog: 'Neues Zimmer' opens dialog with room number,
  name, capacity, price/night fields → calls createRoom
- CreateGuestDialog: 'Neuer Gast' opens dialog with first/last name,
  email, phone fields → calls createGuest

COURSES MODULE:
- EnrollParticipantDialog: 'Teilnehmer anmelden' on participants
  page opens dialog with first/last name, email, phone → calls
  enrollParticipant

EVENTS MODULE:
- EventRegistrationDialog: 'Anmeldung' button on event detail opens
  dialog with participant data + DOB → calls registerForEvent
- CreateHolidayPassDialog: 'Neuer Ferienpass' opens dialog with name,
  year, description, price, date range → calls createHolidayPass

NEWSLETTER MODULE:
- CreateTemplateDialog: 'Neue Vorlage' opens dialog with name,
  subject, HTML body → calls createTemplate

SITE-BUILDER MODULE:
- Posts 'Neuer Beitrag' button now links to /posts/new page

All dialogs use German labels, helpful placeholders, loading spinners,
toast notifications, and form validation appropriate for association
board members (Vereinsvorstände, 40-65, moderate tech skills).

packages/features/booking-management/package.json

@@ -35,5 +35,8 @@
     "react": "catalog:",
     "react-hook-form": "catalog:",
     "zod": "catalog:"
+  },
+  "dependencies": {
+    "lucide-react": "catalog:"
   }
-}
+}

packages/features/booking-management/src/components/booking-status-actions.tsx

@@ -0,0 +1,99 @@
+'use client';
+
+import { useAction } from 'next-safe-action/hooks';
+import { useRouter } from 'next/navigation';
+
+import { LogIn, LogOut, XCircle, Loader2 } from 'lucide-react';
+
+import { Button } from '@kit/ui/button';
+import { toast } from '@kit/ui/sonner';
+
+import { updateBookingStatus } from '../server/actions/booking-actions';
+
+interface BookingStatusActionsProps {
+  bookingId: string;
+  status: string;
+}
+
+export function BookingStatusActions({
+  bookingId,
+  status,
+}: BookingStatusActionsProps) {
+  const router = useRouter();
+
+  const action = useAction(updateBookingStatus, {
+    onSuccess: ({ data }) => {
+      if (data?.success) {
+        toast.success('Status aktualisiert');
+        router.refresh();
+      } else {
+        toast.error(data?.error ?? 'Fehler beim Aktualisieren');
+      }
+    },
+    onError: () => {
+      toast.error('Fehler beim Aktualisieren des Status');
+    },
+  });
+
+  const execute = (newStatus: string) =>
+    action.execute({ bookingId, status: newStatus as any });
+
+  if (status === 'cancelled' || status === 'checked_out') {
+    return (
+      <p className="text-muted-foreground py-2 text-sm">
+        {status === 'cancelled'
+          ? 'Diese Buchung wurde storniert.'
+          : 'Diese Buchung ist abgeschlossen.'}
+      </p>
+    );
+  }
+
+  return (
+    <div className="flex flex-wrap gap-3">
+      {(status === 'pending' || status === 'confirmed') && (
+        <Button
+          onClick={() => execute('checked_in')}
+          disabled={action.isPending}
+        >
+          {action.isPending ? (
+            <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+          ) : (
+            <LogIn className="mr-2 h-4 w-4" />
+          )}
+          Einchecken
+        </Button>
+      )}
+
+      {status === 'checked_in' && (
+        <Button
+          onClick={() => execute('checked_out')}
+          disabled={action.isPending}
+        >
+          {action.isPending ? (
+            <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+          ) : (
+            <LogOut className="mr-2 h-4 w-4" />
+          )}
+          Auschecken
+        </Button>
+      )}
+
+      {status !== 'cancelled' &&
+        status !== 'checked_out' &&
+        status !== 'no_show' && (
+          <Button
+            variant="destructive"
+            onClick={() => execute('cancelled')}
+            disabled={action.isPending}
+          >
+            {action.isPending ? (
+              <Loader2 className="mr-2 h-4 w-4 animate-spin" />
+            ) : (
+              <XCircle className="mr-2 h-4 w-4" />
+            )}
+            Stornieren
+          </Button>
+        )}
+    </div>
+  );
+}

packages/features/booking-management/src/components/create-guest-dialog.tsx

@@ -0,0 +1,80 @@
+'use client';
+
+import { useAction } from 'next-safe-action/hooks';
+import { useRouter } from 'next/navigation';
+import { useState } from 'react';
+
+import { Plus, Loader2 } from 'lucide-react';
+
+import { Button } from '@kit/ui/button';
+import {
+  Dialog,
+  DialogContent,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from '@kit/ui/dialog';
+import { Input } from '@kit/ui/input';
+import { Label } from '@kit/ui/label';
+import { toast } from '@kit/ui/sonner';
+
+import { createGuest } from '../server/actions/booking-actions';
+
+interface CreateGuestDialogProps {
+  accountId: string;
+}
+
+export function CreateGuestDialog({ accountId }: CreateGuestDialogProps) {
+  const router = useRouter();
+  const [open, setOpen] = useState(false);
+  const [form, setForm] = useState({ firstName: '', lastName: '', email: '', phone: '' });
+
+  const action = useAction(createGuest, {
+    onSuccess: () => {
+      toast.success('Gast erstellt');
+      setOpen(false);
+      setForm({ firstName: '', lastName: '', email: '', phone: '' });
+      router.refresh();
+    },
+    onError: () => toast.error('Fehler beim Erstellen'),
+  });
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <DialogTrigger asChild>
+        <Button><Plus className="mr-2 h-4 w-4" />Neuer Gast</Button>
+      </DialogTrigger>
+      <DialogContent>
+        <DialogHeader><DialogTitle>Gast anlegen</DialogTitle></DialogHeader>
+        <div className="grid gap-4 py-4">
+          <div className="grid grid-cols-2 gap-4">
+            <div className="grid gap-2">
+              <Label>Vorname *</Label>
+              <Input value={form.firstName} onChange={(e) => setForm(s => ({ ...s, firstName: e.target.value }))} />
+            </div>
+            <div className="grid gap-2">
+              <Label>Nachname *</Label>
+              <Input value={form.lastName} onChange={(e) => setForm(s => ({ ...s, lastName: e.target.value }))} />
+            </div>
+          </div>
+          <div className="grid gap-2">
+            <Label>E-Mail</Label>
+            <Input type="email" value={form.email} onChange={(e) => setForm(s => ({ ...s, email: e.target.value }))} />
+          </div>
+          <div className="grid gap-2">
+            <Label>Telefon</Label>
+            <Input value={form.phone} onChange={(e) => setForm(s => ({ ...s, phone: e.target.value }))} />
+          </div>
+        </div>
+        <DialogFooter>
+          <Button variant="outline" onClick={() => setOpen(false)}>Abbrechen</Button>
+          <Button onClick={() => action.execute({ accountId, firstName: form.firstName, lastName: form.lastName, email: form.email || undefined, phone: form.phone || undefined })} disabled={action.isPending || !form.firstName || !form.lastName}>
+            {action.isPending && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+            Erstellen
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

packages/features/booking-management/src/components/create-room-dialog.tsx

@@ -0,0 +1,88 @@
+'use client';
+
+import { useAction } from 'next-safe-action/hooks';
+import { useRouter } from 'next/navigation';
+import { useState } from 'react';
+
+import { Plus, Loader2 } from 'lucide-react';
+
+import { Button } from '@kit/ui/button';
+import {
+  Dialog,
+  DialogContent,
+  DialogFooter,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from '@kit/ui/dialog';
+import { Input } from '@kit/ui/input';
+import { Label } from '@kit/ui/label';
+import { toast } from '@kit/ui/sonner';
+
+import { createRoom } from '../server/actions/booking-actions';
+
+interface CreateRoomDialogProps {
+  accountId: string;
+}
+
+export function CreateRoomDialog({ accountId }: CreateRoomDialogProps) {
+  const router = useRouter();
+  const [open, setOpen] = useState(false);
+  const [form, setForm] = useState({
+    roomNumber: '',
+    name: '',
+    roomType: 'single',
+    capacity: '2',
+    pricePerNight: '0',
+  });
+
+  const action = useAction(createRoom, {
+    onSuccess: () => {
+      toast.success('Zimmer erstellt');
+      setOpen(false);
+      setForm({ roomNumber: '', name: '', roomType: 'single', capacity: '2', pricePerNight: '0' });
+      router.refresh();
+    },
+    onError: () => toast.error('Fehler beim Erstellen'),
+  });
+
+  return (
+    <Dialog open={open} onOpenChange={setOpen}>
+      <DialogTrigger asChild>
+        <Button><Plus className="mr-2 h-4 w-4" />Neues Zimmer</Button>
+      </DialogTrigger>
+      <DialogContent>
+        <DialogHeader>
+          <DialogTitle>Zimmer anlegen</DialogTitle>
+        </DialogHeader>
+        <div className="grid gap-4 py-4">
+          <div className="grid gap-2">
+            <Label>Zimmernummer *</Label>
+            <Input placeholder="z.B. 101" value={form.roomNumber} onChange={(e) => setForm(s => ({ ...s, roomNumber: e.target.value }))} />
+          </div>
+          <div className="grid gap-2">
+            <Label>Bezeichnung</Label>
+            <Input placeholder="z.B. Doppelzimmer Süd" value={form.name} onChange={(e) => setForm(s => ({ ...s, name: e.target.value }))} />
+          </div>
+          <div className="grid grid-cols-2 gap-4">
+            <div className="grid gap-2">
+              <Label>Kapazität</Label>
+              <Input type="number" min="1" value={form.capacity} onChange={(e) => setForm(s => ({ ...s, capacity: e.target.value }))} />
+            </div>
+            <div className="grid gap-2">
+              <Label>Preis/Nacht (€)</Label>
+              <Input type="number" step="0.01" min="0" value={form.pricePerNight} onChange={(e) => setForm(s => ({ ...s, pricePerNight: e.target.value }))} />
+            </div>
+          </div>
+        </div>
+        <DialogFooter>
+          <Button variant="outline" onClick={() => setOpen(false)}>Abbrechen</Button>
+          <Button onClick={() => action.execute({ accountId, roomNumber: form.roomNumber, name: form.name || undefined, roomType: form.roomType as any, capacity: Number(form.capacity) || 2, pricePerNight: Number(form.pricePerNight) || 0 })} disabled={action.isPending || !form.roomNumber}>
+            {action.isPending && <Loader2 className="mr-2 h-4 w-4 animate-spin" />}
+            Erstellen
+          </Button>
+        </DialogFooter>
+      </DialogContent>
+    </Dialog>
+  );
+}

packages/features/booking-management/src/components/index.ts

@@ -1 +1,4 @@
 export { CreateBookingForm } from './create-booking-form';
+export { BookingStatusActions } from './booking-status-actions';
+export { CreateRoomDialog } from './create-room-dialog';
+export { CreateGuestDialog } from './create-guest-dialog';