feat: enhance news management with create modal and detail page

src/app/admin/news-management/page.tsx

@@ -16,6 +16,8 @@ export default function NewsManagementPage() {
   const [showCreate, setShowCreate] = React.useState(false)
   const [selected, setSelected] = React.useState<any | null>(null)
   const [deleteTarget, setDeleteTarget] = React.useState<any | null>(null)
+  const [createError, setCreateError] = React.useState<string | null>(null)
+  const [creating, setCreating] = React.useState(false)
 
   return (
     <PageTransitionEffect>
@@ -71,7 +73,24 @@ export default function NewsManagementPage() {
       <Footer />
 
       {showCreate && (
-        <CreateNewsModal onClose={() => setShowCreate(false)} onCreate={async (payload) => { await addNews(payload); setShowCreate(false); await refresh() }} />
+        <CreateNewsModal
+          onClose={() => { setShowCreate(false); setCreateError(null) }}
+          creating={creating}
+          error={createError}
+          onCreate={async (payload) => {
+            setCreateError(null)
+            setCreating(true)
+            try {
+              await addNews(payload)
+              setShowCreate(false)
+              await refresh()
+            } catch (e: any) {
+              setCreateError(e?.message || 'Failed to create news')
+            } finally {
+              setCreating(false)
+            }
+          }}
+        />
       )}
       {selected && (
         <EditNewsModal item={selected} onClose={() => setSelected(null)} onUpdate={async (id, payload) => { await updateNews(id, payload); setSelected(null); await refresh() }} />
@@ -107,11 +126,22 @@ export default function NewsManagementPage() {
   )
 }
 
-function CreateNewsModal({ onClose, onCreate }: { onClose: () => void; onCreate: (payload: { title: string; summary?: string; content?: string; slug: string; category?: string; isActive: boolean; publishedAt?: string | null; imageFile?: File }) => void }) {
+function CreateNewsModal({
+  onClose,
+  onCreate,
+  creating,
+  error,
+}: {
+  onClose: () => void
+  onCreate: (payload: { title: string; summary?: string; content?: string; slug: string; category?: string; isActive: boolean; publishedAt?: string | null; imageFile?: File }) => void
+  creating: boolean
+  error: string | null
+}) {
   const [title, setTitle] = React.useState('')
   const [summary, setSummary] = React.useState('')
   const [content, setContent] = React.useState('')
   const [slug, setSlug] = React.useState('')
+  const [slugTouched, setSlugTouched] = React.useState(false)
   const [category, setCategory] = React.useState('')
   const [isActive, setIsActive] = React.useState(true)
   const [publishedAt, setPublishedAt] = React.useState<string>('')
@@ -143,9 +173,24 @@ function CreateNewsModal({ onClose, onCreate }: { onClose: () => void; onCreate:
     setRawUrl(null)
   }
 
+  const slugify = (value: string) => value
+    .toLowerCase()
+    .trim()
+    .replace(/[^a-z0-9\s-]/g, '')
+    .replace(/\s+/g, '-')
+    .replace(/-+/g, '-')
+    .replace(/^-|-$/g, '')
+
+  React.useEffect(() => {
+    if (!slugTouched) {
+      setSlug(slugify(title))
+    }
+  }, [title, slugTouched])
+
   const submit = (e: React.FormEvent) => {
     e.preventDefault()
-    onCreate({ title, summary: summary || undefined, content: content || undefined, slug, category: category || undefined, isActive, publishedAt: publishedAt || undefined, imageFile })
+    const safeSlug = slug.trim() || slugify(title)
+    onCreate({ title: title.trim(), summary: summary || undefined, content: content || undefined, slug: safeSlug, category: category || undefined, isActive, publishedAt: publishedAt || undefined, imageFile })
   }
 
   return (
@@ -158,8 +203,22 @@ function CreateNewsModal({ onClose, onCreate }: { onClose: () => void; onCreate:
             <button onClick={onClose} className="text-gray-500 hover:text-gray-700"><XMarkIcon className="h-6 w-6"/></button>
           </div>
           <form onSubmit={submit} className="p-6 space-y-4">
+            {error && (
+              <div className="rounded-lg border border-red-200 bg-red-50 px-4 py-3 text-sm text-red-700">
+                {error}
+              </div>
+            )}
             <input className="w-full border rounded px-4 py-2 text-gray-900" placeholder="Title" value={title} onChange={e=>setTitle(e.target.value)} required />
-            <input className="w-full border rounded px-4 py-2 text-gray-900" placeholder="Slug" value={slug} onChange={e=>setSlug(e.target.value)} required />
+            <div>
+              <input
+                className="w-full border rounded px-4 py-2 text-gray-900"
+                placeholder="Slug"
+                value={slug}
+                onChange={e=>{ setSlugTouched(true); setSlug(e.target.value) }}
+                required
+              />
+              <p className="mt-1 text-xs text-gray-500">Used in the URL. Auto-generated from title unless edited.</p>
+            </div>
             <input className="w-full border rounded px-4 py-2 text-gray-900" placeholder="Category" value={category} onChange={e=>setCategory(e.target.value)} />
             <textarea className="w-full border rounded px-4 py-2 text-gray-900" placeholder="Summary" value={summary} onChange={e=>setSummary(e.target.value)} rows={3} />
             <textarea className="w-full border rounded px-4 py-2 text-gray-900" placeholder="Content (markdown/html)" value={content} onChange={e=>setContent(e.target.value)} rows={6} />
@@ -188,7 +247,13 @@ function CreateNewsModal({ onClose, onCreate }: { onClose: () => void; onCreate:
             </div>
             <div className="flex items-center justify-end gap-2 pt-4 border-t">
               <button type="button" onClick={onClose} className="px-5 py-2.5 text-sm bg-red-50 text-red-700 rounded-lg hover:bg-red-100">Cancel</button>
-              <button type="submit" className="px-5 py-2.5 text-sm text-white bg-blue-900 rounded-lg">Add News</button>
+              <button
+                type="submit"
+                disabled={creating || !title.trim()}
+                className="px-5 py-2.5 text-sm text-white bg-blue-900 rounded-lg disabled:opacity-60 disabled:cursor-not-allowed"
+              >
+                {creating ? 'Creating…' : 'Add News'}
+              </button>
             </div>
           </form>
         </div>

src/app/news/[slug]/page.tsx

@@ -0,0 +1,151 @@
+'use client'
+
+import React from 'react'
+import Link from 'next/link'
+import { useParams } from 'next/navigation'
+import Header from '../../components/nav/Header'
+import Footer from '../../components/Footer'
+import PageTransitionEffect from '../../components/animation/pageTransitionEffect'
+
+type PublicNewsItem = {
+  id: number
+  title: string
+  summary?: string
+  content?: string
+  slug: string
+  category?: string
+  imageUrl?: string
+  published_at?: string | null
+}
+
+function estimateReadingTime(text: string) {
+  const words = text.trim().split(/\s+/).filter(Boolean).length
+  const minutes = Math.max(1, Math.ceil(words / 200))
+  return `${minutes} min read`
+}
+
+export default function NewsDetailPage() {
+  const params = useParams()
+  const slug = typeof params?.slug === 'string' ? params.slug : Array.isArray(params?.slug) ? params.slug[0] : ''
+
+  const [item, setItem] = React.useState<PublicNewsItem | null>(null)
+  const [loading, setLoading] = React.useState(false)
+  const [error, setError] = React.useState<string | null>(null)
+
+  React.useEffect(() => {
+    if (!slug) return
+    let active = true
+    ;(async () => {
+      setLoading(true)
+      setError(null)
+      try {
+        const BASE_URL = process.env.NEXT_PUBLIC_API_BASE_URL || 'http://localhost:3001'
+        const res = await fetch(`${BASE_URL}/api/news/${encodeURIComponent(slug)}`)
+        if (!res.ok) {
+          if (res.status === 404) throw new Error('News article not found.')
+          throw new Error('Failed to load news article.')
+        }
+        const json = await res.json()
+        if (active) setItem(json.data || null)
+      } catch (e: any) {
+        if (active) setError(e?.message || 'Failed to load news article.')
+      } finally {
+        if (active) setLoading(false)
+      }
+    })()
+    return () => { active = false }
+  }, [slug])
+
+  const readingTime = item?.content ? estimateReadingTime(item.content) : null
+
+  return (
+    <PageTransitionEffect>
+      <Header />
+      <main className="bg-gradient-to-b from-blue-50 to-white min-h-screen">
+        <div className="mx-auto max-w-6xl px-6 py-10">
+          <nav className="text-sm text-gray-500 mb-6">
+            <Link href="/" className="hover:text-blue-900">Home</Link>
+            <span className="mx-2">/</span>
+            <Link href="/news" className="hover:text-blue-900">News</Link>
+            {item?.title && (
+              <>
+                <span className="mx-2">/</span>
+                <span className="text-gray-700 line-clamp-1">{item.title}</span>
+              </>
+            )}
+          </nav>
+
+          {loading && (
+            <div className="rounded-2xl bg-white shadow-lg border border-gray-100 p-8">
+              <div className="animate-pulse space-y-4">
+                <div className="h-6 w-2/3 bg-gray-200 rounded" />
+                <div className="h-4 w-1/3 bg-gray-100 rounded" />
+                <div className="h-64 w-full bg-gray-100 rounded" />
+                <div className="h-4 w-3/4 bg-gray-100 rounded" />
+                <div className="h-4 w-5/6 bg-gray-100 rounded" />
+              </div>
+            </div>
+          )}
+
+          {error && !loading && (
+            <div className="rounded-2xl bg-white shadow-lg border border-red-100 p-8">
+              <div className="text-red-700 font-medium mb-2">{error}</div>
+              <Link href="/news" className="text-blue-900 hover:text-blue-700 font-semibold">
+                Back to News
+              </Link>
+            </div>
+          )}
+
+          {!loading && !error && item && (
+            <article className="rounded-2xl bg-white shadow-lg border border-gray-100 overflow-hidden">
+              <header className="p-6 sm:p-10">
+                <div className="flex flex-wrap items-center gap-2 text-xs text-blue-700">
+                  {item.category && (
+                    <span className="inline-flex items-center rounded-full bg-blue-50 border border-blue-100 px-2.5 py-1 font-medium">
+                      {item.category}
+                    </span>
+                  )}
+                  {item.published_at && (
+                    <span className="text-gray-500">
+                      {new Date(item.published_at).toLocaleDateString('de-DE')}
+                    </span>
+                  )}
+                  {readingTime && (
+                    <span className="text-gray-500">• {readingTime}</span>
+                  )}
+                </div>
+                <h1 className="mt-4 text-3xl sm:text-4xl font-extrabold text-blue-900 tracking-tight">
+                  {item.title}
+                </h1>
+                {item.summary && (
+                  <p className="mt-4 text-lg text-gray-700">
+                    {item.summary}
+                  </p>
+                )}
+              </header>
+
+              <div className="px-6 sm:px-10 pb-10">
+                <div className="mx-auto max-w-[104ch]">
+                  {item.imageUrl ? (
+                    <div className="mb-6 lg:-mt-24 lg:mb-2 lg:ml-16 lg:float-right lg:w-[60%] rounded-2xl overflow-hidden shadow bg-gray-50 border border-gray-100">
+                      <img
+                        src={item.imageUrl}
+                        alt={item.title}
+                        className="w-full h-72 sm:h-80 lg:h-96 object-cover"
+                      />
+                    </div>
+                  ) : null}
+                  <div className="prose prose-lg max-w-none text-gray-800 whitespace-pre-wrap break-words overflow-wrap-anywhere">
+                    {item.content || 'No content available.'}
+                  </div>
+                  <div className="clear-both" />
+                </div>
+              </div>
+            </article>
+          )}
+        </div>
+      </main>
+      <Footer />
+    </PageTransitionEffect>
+  )
+}

src/app/news/page.tsx

@@ -1,10 +1,10 @@
 'use client'
 
 import React from 'react'
+import Link from 'next/link'
 import Header from '../components/nav/Header'
 import Footer from '../components/Footer'
 import PageTransitionEffect from '../components/animation/pageTransitionEffect'
-import { XMarkIcon } from '@heroicons/react/24/outline'
 
 type PublicNewsItem = {
   id: number
@@ -17,47 +17,10 @@ type PublicNewsItem = {
   published_at?: string | null
 }
 
-function NewsDetailModal({ item, onClose }: { item: PublicNewsItem; onClose: () => void }) {
-  return (
-    <div className="fixed inset-0 z-50">
-      <div className="absolute inset-0 bg-black/60" onClick={onClose} />
-      <div className="absolute inset-0 flex items-center justify-center p-4">
-        <div className="relative w-full max-w-4xl bg-white rounded-2xl shadow-2xl max-h-[90vh] flex flex-col">
-          <div className="flex-shrink-0 bg-white border-b px-6 py-4 flex items-center justify-between rounded-t-2xl">
-            <h2 className="text-2xl font-bold text-blue-900 pr-4">{item.title}</h2>
-            <button onClick={onClose} className="text-gray-500 hover:text-gray-700 flex-shrink-0">
-              <XMarkIcon className="h-6 w-6" />
-            </button>
-          </div>
-          <div className="p-6 overflow-y-auto">
-            {item.imageUrl && (
-              <div className="rounded-xl overflow-hidden mb-6 max-h-80 flex items-center justify-center bg-gray-50">
-                <img src={item.imageUrl} alt={item.title} className="w-full h-full object-contain" />
-              </div>
-            )}
-            {item.published_at && (
-              <div className="text-sm text-gray-500 mb-4">
-                Published: {new Date(item.published_at).toLocaleDateString('de-DE')}
-              </div>
-            )}
-            {item.summary && (
-              <div className="text-lg text-gray-700 mb-6 font-medium">{item.summary}</div>
-            )}
-            <div className="prose prose-lg max-w-none text-gray-800 whitespace-pre-wrap break-words overflow-wrap-anywhere">
-              {item.content || 'No content available.'}
-            </div>
-          </div>
-        </div>
-      </div>
-    </div>
-  )
-}
-
 export default function NewsPage() {
   const [items, setItems] = React.useState<PublicNewsItem[]>([])
   const [loading, setLoading] = React.useState(false)
   const [error, setError] = React.useState<string | null>(null)
-  const [selectedItem, setSelectedItem] = React.useState<PublicNewsItem | null>(null)
 
   React.useEffect(() => {
     (async () => {
@@ -110,10 +73,10 @@ export default function NewsPage() {
           {!loading && items.length > 0 && (
             <div className="grid grid-cols-1 md:grid-cols-2 lg:grid-cols-3 gap-8">
               {items.map(item => (
-                <article
+                <Link
                   key={item.id}
-                  onClick={() => setSelectedItem(item)}
-                  className="bg-white rounded-2xl shadow-lg overflow-hidden hover:shadow-2xl transition-all duration-300 cursor-pointer transform hover:-translate-y-1"
+                  href={`/news/${item.slug}`}
+                  className="group bg-white rounded-2xl shadow-lg overflow-hidden hover:shadow-2xl transition-all duration-300 transform hover:-translate-y-1"
                 >
                   <div className="aspect-[3/2] bg-gradient-to-br from-blue-100 to-blue-50">
                     {item.imageUrl ? (
@@ -125,35 +88,38 @@ export default function NewsPage() {
                     )}
                   </div>
                   <div className="p-6">
-                    <h2 className="text-xl font-bold text-blue-900 mb-3 line-clamp-2 hover:text-blue-700">
+                    <div className="flex items-center gap-2 text-xs text-blue-700">
+                      {item.category && (
+                        <span className="inline-flex items-center rounded-full bg-blue-50 border border-blue-100 px-2 py-0.5 font-medium">
+                          {item.category}
+                        </span>
+                      )}
+                      {item.published_at && (
+                        <span className="text-gray-500">
+                          {new Date(item.published_at).toLocaleDateString('de-DE')}
+                        </span>
+                      )}
+                    </div>
+                    <h2 className="mt-3 text-xl font-bold text-blue-900 line-clamp-2 group-hover:text-blue-700">
                       {item.title}
                     </h2>
                     {item.summary && (
-                      <p className="text-gray-700 mb-4 line-clamp-3">{item.summary}</p>
+                      <p className="mt-3 text-gray-700 line-clamp-3">{item.summary}</p>
                     )}
-                    {item.published_at && (
-                      <div className="text-sm text-gray-500 mb-4">
-                        {new Date(item.published_at).toLocaleDateString('de-DE')}
-                      </div>
-                    )}
-                    <button className="inline-flex items-center text-blue-900 font-semibold hover:text-blue-700">
+                    <div className="mt-4 inline-flex items-center text-blue-900 font-semibold group-hover:text-blue-700">
                       Read More
                       <svg className="ml-2 h-4 w-4" fill="none" viewBox="0 0 24 24" stroke="currentColor">
                         <path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M9 5l7 7-7 7" />
                       </svg>
-                    </button>
                     </div>
-                </article>
+                  </div>
+                </Link>
               ))}
             </div>
           )}
         </div>
       </main>
       <Footer />
-
-      {selectedItem && (
-        <NewsDetailModal item={selectedItem} onClose={() => setSelectedItem(null)} />
-      )}
     </PageTransitionEffect>
   )
 }