Fix library thumbnails and let clips keep a display name.

Extract a poster frame when a still-thumb is missing, and show the clip name in the library with the prompt on the info icon.

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

server/api/generate.post.ts

@@ -35,6 +35,7 @@ export default defineEventHandler(async (event) => {
     : Math.floor(Math.random() * 2_147_483_647)
   const length = frameLength(Number(fields.duration || 5))
   const hideThumbnail = fields.hideThumbnail === 'true'
+  const clipName = (fields.name || '').trim().slice(0, 80)
   const ownerKey = libraryOwnerKey(event)
   const library = publicLibrary(event)
   const folderId = library.folders.some(folder => folder.id === fields.folderId)
@@ -60,6 +61,7 @@ export default defineEventHandler(async (event) => {
     ownerKey,
     folderId,
     hideThumbnail,
+    name: clipName,
     prompt,
     aspect: fields.aspect || 'auto',
     width,
@@ -133,6 +135,7 @@ async function runGeneration(
       ownerKey: job.library.ownerKey,
       folderId: job.library.folderId,
       hideThumbnail: job.library.hideThumbnail,
+      name: job.library.name,
       prompt: job.library.prompt,
       aspect: job.library.aspect,
       width: job.library.width,