Muster & Angebot: Vor-/Nachname getrennt, „Ort" statt „Stadt", Angebot als Seite

- Muster bestellen + individuelles Angebot: getrennte Felder Vorname/Nachname
  (statt einem Namensfeld).
- Muster-Formular: Feld „Stadt" → „Ort".
- „Individuelles Angebot" öffnet jetzt eine eigene Seite (/angebot) statt Popup.

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

src/components/AppShell.tsx

@@ -180,7 +180,7 @@ function Angebot({ onClose, vorbelegung }: { onClose: () => void; vorbelegung?:
 export function Muster({ onClose = () => {}, variant = 'dialog' }: { onClose?: () => void; variant?: 'dialog' | 'page' }) {
   const [produkte, setProdukte] = useState<Product[]>([]);
   const [form, setForm] = useState({
-    product: '', name: '', email: '', phone: '',
+    product: '', first_name: '', last_name: '', email: '', phone: '',
     street: '', zip: '', city: '', country: 'Deutschland', message: '',
   });
   const [datenschutz, setDatenschutz] = useState(false);
@@ -195,7 +195,8 @@ export function Muster({ onClose = () => {}, variant = 'dialog' }: { onClose?: (
       fetchMyCustomer()
         .then((c) => c && setForm((f) => ({
           ...f,
-          name: [c.first_name, c.last_name].filter(Boolean).join(' ') || f.name,
+          first_name: c.first_name || f.first_name,
+          last_name: c.last_name || f.last_name,
           email: c.email || f.email,
           phone: c.phone || f.phone,
         })))
@@ -216,7 +217,8 @@ export function Muster({ onClose = () => {}, variant = 'dialog' }: { onClose?: (
     try {
       await sendSampleRequest({
         product: form.product,
-        name: form.name.trim(),
+        first_name: form.first_name.trim(),
+        last_name: form.last_name.trim(),
         email: form.email.trim(),
         phone: form.phone.trim() || undefined,
         street: form.street.trim(),
@@ -259,7 +261,7 @@ export function Muster({ onClose = () => {}, variant = 'dialog' }: { onClose?: (
     </div>
   );
 
-  const gueltig = form.product && form.name.trim() && istEmail(form.email) && form.phone.trim()
+  const gueltig = form.product && form.first_name.trim() && form.last_name.trim() && istEmail(form.email) && form.phone.trim()
     && form.street.trim() && form.zip.trim() && form.city.trim() && datenschutz;
 
   return wrap('Muster bestellen', (
@@ -275,12 +277,13 @@ export function Muster({ onClose = () => {}, variant = 'dialog' }: { onClose?: (
             {produkte.map((p) => <option key={p.key} value={p.key}>{p.name}</option>)}
           </select>
         </div>
-        {feld('name', 'Name')}
+        {feld('first_name', 'Vorname')}
+        {feld('last_name', 'Nachname')}
         {feld('email', 'E-Mail-Adresse', false, 'email')}
         {feld('phone', 'Telefon', false, 'tel')}
         {feld('street', 'Straße und Hausnummer')}
         {feld('zip', 'PLZ')}
-        {feld('city', 'Stadt')}
+        {feld('city', 'Ort')}
         <div className="sk-field">
           <label className="sk-label sk-label--required" htmlFor="m-country">Land</label>
           <select id="m-country" className="sk-input" value={form.country} onChange={set('country')}>
@@ -398,10 +401,10 @@ function Sidebar({ onNavigate }: { onNavigate?: () => void }) {
           <IconMail />
           <span>Muster bestellen</span>
         </NavLink>
-        <button className="sk-nav-item sk-nav-item--quiet" onClick={() => { open('angebot'); onNavigate?.(); }}>
+        <NavLink to="/angebot" className="sk-nav-item sk-nav-item--quiet" onClick={onNavigate}>
           <IconOffer />
           <span>Individuelles Angebot</span>
-        </button>
+        </NavLink>
         <button className="sk-nav-item sk-nav-item--quiet" onClick={() => { open('hilfe'); onNavigate?.(); }}>
           <IconHelp />
           <span>Hilfe</span>