Add paginated library JSON and dedicated still thumbs that never stream archive masters.

Co-authored-by: Cursor <cursoragent@cursor.com>

server/api/library/index.get.ts

@@ -1,5 +1,26 @@
+import { publicLibrary, publicLibraryPage } from '~/server/utils/library'
+
 export default defineEventHandler((event) => {
-  const light = String(getQuery(event).light || '') === '1'
+  const query = getQuery(event)
+  const light = String(query.light || '') === '1'
+  const limitRaw = query.limit
+  const wantsPage = limitRaw != null && String(limitRaw) !== ''
+
+  if (wantsPage) {
+    const page = publicLibraryPage(event, {
+      limit: Number(limitRaw) || 50,
+      cursor: String(query.cursor || ''),
+      folderId: String(query.folderId || query.folder || ''),
+      type: String(query.type || query.filter || 'all')
+    })
+    try {
+      const { owner } = assertLibraryOwner(event)
+      const folderId = page.folders.find(folder => folder.unlocked)?.id
+      void maintainLibrary(owner, folderId).catch(() => null)
+    } catch { /* locked or anonymous */ }
+    return page
+  }
+
   const library = publicLibrary(event, { light })
   try {
     const { owner } = assertLibraryOwner(event)