fix: remove stale value check from OrderQuestion initial; guard wrong class in Match

frontend/src/components/questions/Match.tsx

@@ -57,7 +57,7 @@ export default function Match({ q, value, onChange, locked, graded }: Props) {
           else if (current[item.id]) cls += ' paired'
           if (graded) {
             if (answer[item.id] && current[item.id] === answer[item.id]) cls += ' correct'
-            else if (current[item.id]) cls += ' wrong'
+            else if (current[item.id] && answer[item.id]) cls += ' wrong'
           }
           const pairedRightIdx = current[item.id]
             ? (q.right ?? []).findIndex((x) => x.id === current[item.id])

frontend/src/components/questions/OrderQuestion.tsx

@@ -14,7 +14,6 @@ export default function OrderQuestion({ q, value, onChange, locked, graded }: Pr
   const items = q.items ?? []
 
   const initial = useMemo(() => {
-    if (Array.isArray(value) && value.length === items.length) return value
     const ids = items.map((i) => i.id)
     const seed = q.id.split('').reduce((a, c) => a + c.charCodeAt(0), 0)
     const out = [...ids]
@@ -58,7 +57,7 @@ export default function OrderQuestion({ q, value, onChange, locked, graded }: Pr
             className={cls}
             draggable={!locked}
             onDragStart={(e) => { setDragIdx(idx); e.dataTransfer.effectAllowed = 'move' }}
-            onDragOver={(e) => { e.preventDefault(); setOverIdx(idx) }}
+            onDragOver={(e) => { e.preventDefault(); if (dragIdx !== idx) setOverIdx(idx) }}
             onDrop={(e) => {
               e.preventDefault()
               if (dragIdx != null && dragIdx !== idx) move(dragIdx, idx)