Fix admin publish data loss for unreleased lessons and harden data persistence

src/AdminPage.tsx

@@ -691,11 +691,22 @@ export default function AdminPage({ content, onSave, onLogout }: Props) {
   }
 
   async function reloadContentFromServer() {
-    const r = await fetch('/api/admin-content')
-    if (!r.ok) return
-    const data = await r.json() as { siteContent?: Partial<SiteContent> }
-    if (data?.siteContent && typeof data.siteContent === 'object') {
-      const next = normalizeSiteContentForAdmin({ ...DEFAULTS, ...data.siteContent })
+    const draftRes = await fetch('/api/admin-content?source=draft')
+    if (draftRes.ok) {
+      const draftData = await draftRes.json() as { siteContent?: Partial<SiteContent> }
+      if (draftData?.siteContent && typeof draftData.siteContent === 'object') {
+        const next = normalizeSiteContentForAdmin({ ...DEFAULTS, ...draftData.siteContent })
+        setForm(next)
+        onSave(next)
+        return
+      }
+    }
+
+    const publishedRes = await fetch('/api/admin-content')
+    if (!publishedRes.ok) return
+    const publishedData = await publishedRes.json() as { siteContent?: Partial<SiteContent> }
+    if (publishedData?.siteContent && typeof publishedData.siteContent === 'object') {
+      const next = normalizeSiteContentForAdmin({ ...DEFAULTS, ...publishedData.siteContent })
       setForm(next)
       onSave(next)
     }
@@ -771,7 +782,7 @@ export default function AdminPage({ content, onSave, onLogout }: Props) {
       }
 
       const published = await publishRes.json() as { publishedAt?: string }
-      const latestRes = await fetch('/api/admin-content')
+      const latestRes = await fetch('/api/admin-content?source=draft')
       if (!latestRes.ok) throw new Error('Failed to refresh published content')
       const latest = await latestRes.json() as { siteContent?: Partial<SiteContent> }
       if (latest?.siteContent) {