feat: wire validation accept -> PATCH order status=accepted (closes the 50/50 escrow loop in UI)

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

app/order/[id]/validera/page.tsx

@@ -36,6 +36,17 @@ export default function ValidationPage() {
 
   const toggleDest = (d: string) => setDests((p) => (p.includes(d) ? p.filter((x) => x !== d) : [...p, d]));
 
+  async function approve() {
+    try {
+      await fetch(`/api/orders/${id}`, {
+        method: "PATCH",
+        headers: { "Content-Type": "application/json" },
+        body: JSON.stringify({ status: "accepted" }),
+      });
+    } catch {}
+    setApproved(true);
+  }
+
   return (
     <main ref={ref} className="min-h-screen bg-background text-foreground">
       <OrderStepper active={4} />
@@ -248,7 +259,7 @@ export default function ValidationPage() {
                   Revidera
                 </button>
                 <button
-                  onClick={() => setApproved(true)}
+                  onClick={approve}
                   className="bg-foreground px-5 py-3 font-mono text-[12px] uppercase tracking-[0.1em] text-background transition-colors hover:bg-[var(--accent-red)]"
                 >
                   Godkänn · frigör 50 %