Add shared Manifest UI for delivery, quote, and order.

Wire quote/order API clients and routes, then unify list/create/edit behind ManifestList/Form tiles so Lieferungen and Auftrag share one stack.

src/nav.js

@@ -86,7 +86,18 @@ export function resolveActiveSub(pathname, sectionPath) {
     sectionPath === '/kunde' && rest && !knownSegments.has(rest);
   const isLieferungDetail =
     sectionPath === '/lieferung' && rest && !knownSegments.has(rest);
-  if (isArticleDetail || isKundeDetail || isLieferungDetail) return null;
+  // Angebot neu/edit: /auftrag/neu or /auftrag/:quoteId (not a known sub)
+  const isAngebotDoc =
+    sectionPath === '/auftrag' && rest && !knownSegments.has(rest);
+  if (isArticleDetail || isKundeDetail || isLieferungDetail || isAngebotDoc) {
+    return null;
+  }
+
+  // Keep Bestellung/Ausliefern/Retoure active for nested paths
+  // (e.g. /auftrag/bestellung/neu).
+  if (sectionPath === '/auftrag' && rest && knownSegments.has(rest)) {
+    return rest;
+  }
 
   const active = subNav.find((item) => {
     if (item.segment === 'kategorien') {