fix: disable chat for closed reports

app/pages/reports/[id].vue

@@ -69,6 +69,12 @@ const handleSubmitFeedback = async () => {
 const isOwner = computed(() => report.value?.user_id === user.value?.id)
 const canFeedback = computed(() => report.value?.status === 'RESOLVED')
 
+const canChat = computed(() => {
+  if (!report.value) return false
+  const closedStatuses = ['RESOLVED', 'CLOSED', 'REJECTED']
+  return !closedStatuses.includes(report.value.status)
+})
+
 const statusMeta: Record<string, { label: string; tone: string }> = {
   OPEN: { label: 'Aperta', tone: 'info' },
   UNDER_REVIEW: { label: 'In revisione', tone: 'warning' },
@@ -210,7 +216,12 @@ const formatDate = (dateString: string): string => {
 
               <MessageList :messages="messages"/>
 
-              <MessageComposer @send="handleSendMessage"/>
+              <MessageComposer v-if="canChat" @send="handleSendMessage"/>
+              <div v-else class="alert alert-secondary mt-3 mb-0 text-center small">
+                La chat è disabilitata poiché la segnalazione è in stato
+                <strong>{{ statusMeta[report.status]?.label || report.status }}</strong>.
+              </div>
+
             </div>
           </div>
         </div>