Add preview handling

pages/articles/@slug/+data.js

@@ -0,0 +1,55 @@
+import { getBySlug, getByDocumentId } from '@/libs/strapi'
+
+export const data = async (pageContext) => {
+    const { routeParams, urlParsed } = pageContext
+    const { slug } = routeParams
+    const searchParams = urlParsed.search || {}
+    
+    // Extract preview parameters from URL
+    const isPreview = searchParams.preview === 'true'
+    const status = searchParams.status || 'published'
+    const documentId = searchParams.documentId
+    const uid = searchParams.uid
+    
+    try {
+        let article = null
+        
+        // If we have a documentId from preview, fetch by document ID
+        // This ensures we get the exact document being previewed
+        if (isPreview && documentId && uid === 'api::article.article') {
+            const response = await getByDocumentId('articles', documentId, {
+                isPreview,
+                status,
+                isSingle: false
+            })
+            article = response.data?.[0] || null
+        } else {
+            // Normal fetch by slug
+            const response = await getBySlug('articles', slug, {
+                isPreview,
+                status
+            })
+            article = response.data?.[0] || null
+        }
+        
+        return {
+            article,
+            // Pass preview state to the component
+            isPreview,
+            status,
+            documentId,
+            uid
+        }
+    } catch (error) {
+        console.error('Error fetching article:', error)
+        
+        // Return null article but preserve preview state for proper UI rendering
+        return {
+            article: null,
+            isPreview,
+            status,
+            documentId,
+            uid
+        }
+    }
+}