ST-1230: Sorteerstate en -logica toevoegen aan IdeaList (#126)

* feat(ideas): STATUS_SORT_ORDER + sorteerstate (ST-cmotjj9uf000104l5i70so19b)

- Voeg STATUS_SORT_ORDER toe: workflow-volgorde map (draft→plan_failed)
- Zet standaard sortDir op 'desc' conform AC (code aflopend bij laden)

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* feat(ideas): sorted useMemo + tabel-render koppelen (ST-cmotjj9uf000104l5i70so19b)

- Voeg sorted useMemo toe na filtered: locale-aware sort met STATUS_SORT_ORDER
- Ideeën zonder product sorteren achteraan bij oplopende productsortering
- Vervang filtered.length/filtered.map door sorted in tabel-render

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

---------

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

components/ideas/idea-list.tsx

@@ -70,6 +70,11 @@ const STATUS_FILTERS: { value: IdeaStatusApi; label: string }[] = [
   { value: 'plan_failed', label: 'Plan mislukt' },
 ]
 
+const STATUS_SORT_ORDER: Record<IdeaStatusApi, number> = {
+  draft: 0, grilling: 1, grilled: 2, planning: 3,
+  plan_ready: 4, planned: 5, grill_failed: 6, plan_failed: 7,
+}
+
 function SortHeader({
   col,
   label,
@@ -113,7 +118,7 @@ export function IdeaList({ ideas, products, isDemo }: IdeaListProps) {
 
   // Sort state
   const [sortKey, setSortKey] = useState<SortKey>('code')
-  const [sortDir, setSortDir] = useState<'asc' | 'desc'>('asc')
+  const [sortDir, setSortDir] = useState<'asc' | 'desc'>('desc')
 
   // Create-form state
   const [showCreate, setShowCreate] = useState(false)
@@ -149,6 +154,26 @@ export function IdeaList({ ideas, products, isDemo }: IdeaListProps) {
     })
   }, [ideas, search, productFilter, statusFilter, sortKey, sortDir])
 
+  const sorted = useMemo(() => {
+    return [...filtered].sort((a, b) => {
+      let cmp = 0
+      if (sortKey === 'code') {
+        cmp = (a.code ?? '').localeCompare(b.code ?? '', 'nl', { numeric: true })
+      } else if (sortKey === 'title') {
+        cmp = a.title.localeCompare(b.title, 'nl')
+      } else if (sortKey === 'product') {
+        const aN = a.product?.name ?? ''
+        const bN = b.product?.name ?? ''
+        if (!aN && bN) return sortDir === 'asc' ? 1 : -1
+        if (aN && !bN) return sortDir === 'asc' ? -1 : 1
+        cmp = aN.localeCompare(bN, 'nl')
+      } else {
+        cmp = (STATUS_SORT_ORDER[a.status] ?? 99) - (STATUS_SORT_ORDER[b.status] ?? 99)
+      }
+      return sortDir === 'asc' ? cmp : -cmp
+    })
+  }, [filtered, sortKey, sortDir])
+
   function handleSort(col: SortKey) {
     if (sortKey === col) {
       setSortDir((d) => (d === 'asc' ? 'desc' : 'asc'))
@@ -311,7 +336,7 @@ export function IdeaList({ ideas, products, isDemo }: IdeaListProps) {
       )}
 
       {/* Tabel */}
-      {filtered.length === 0 ? (
+      {sorted.length === 0 ? (
         <p className="text-sm text-muted-foreground py-8 text-center">
           {ideas.length === 0
             ? 'Nog geen ideeën — start hierboven met "Nieuw idee".'
@@ -329,7 +354,7 @@ export function IdeaList({ ideas, products, isDemo }: IdeaListProps) {
             </TableRow>
           </TableHeader>
           <TableBody>
-            {filtered.map((idea) => {
+            {sorted.map((idea) => {
               const badge = getIdeaStatusBadge(API_TO_DB[idea.status])
               return (
                 <TableRow