edit tender module

frontend/src/app/tenders/[id]/page.tsx

@@ -35,6 +35,24 @@ const DIRECTIVE_TYPE_LABELS: Record<string, string> = {
   PREPARE_TO_BID: 'Prepare to bid',
 }
 
+const getDisplayFileName = (attachment: any) => {
+  const name = String(attachment.originalName || attachment.fileName || 'file')
+
+  if (!/[ÃÄÅØÙ]/.test(name)) {
+    return name
+  }
+
+  try {
+    const bytes = new Uint8Array(
+      Array.from(name, (char: string) => char.charCodeAt(0) & 0xff)
+    )
+
+    return new TextDecoder('utf-8').decode(bytes)
+  } catch {
+    return name
+  }
+}
+
 function TenderDetailContent() {
   const searchParams = useSearchParams()
   const params = useParams()
@@ -45,8 +63,8 @@ function TenderDetailContent() {
   const [tender, setTender] = useState<Tender | null>(null)
   const [history, setHistory] = useState<any[]>([])
   const [loading, setLoading] = useState(true)
-  type TenderTab = 'details' | 'directives' | 'attachments' | 'logs' | 'info' |'history'
-  const [activeTab, setActiveTab] = useState<TenderTab>('details')
+  type TenderTab = 'info' | 'directives' | 'attachments' | 'history'
+  const [activeTab, setActiveTab] = useState<TenderTab>('info')
   const openTab = (tab: TenderTab) => {
   setActiveTab(tab)
   router.replace(`/tenders/${params.id}?tab=${tab}`)
@@ -94,9 +112,7 @@ function TenderDetailContent() {
   }
   useEffect(() => {
     const tabParam = searchParams.get('tab') as TenderTab | null
-
-    const allowedTabs: TenderTab[] = ['details', 'directives', 'attachments', 'logs']
-
+    const allowedTabs: TenderTab[] = ['info', 'directives', 'attachments', 'history']
     if (tabParam && allowedTabs.includes(tabParam)) {
       setActiveTab(tabParam)
     }
@@ -284,7 +300,7 @@ function TenderDetailContent() {
             {tabs.map((tab) => (
               <button
                 key={tab.id}
-                onClick={() => setActiveTab(tab.id as any)}
+                onClick={() => openTab(tab.id as TenderTab)}
                 className={`flex items-center gap-2 px-4 py-2 rounded-lg text-sm font-medium ${
                   activeTab === tab.id
                     ? 'bg-indigo-100 text-indigo-800'
@@ -510,7 +526,7 @@ function TenderDetailContent() {
                           className="text-sm text-indigo-600 hover:underline flex items-center gap-1"
                         >
                           <ExternalLink className="h-4 w-4" />
-                          {a.originalName || a.fileName}
+                          {getDisplayFileName(a)}          
                         </a>
 
                         <button