Copy generated stills into Input without loading the current frame.

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

server/utils/library.ts

@@ -1280,6 +1280,29 @@ export async function saveStill(params: {
   return still
 }
 
+export async function keepStillAsInput(owner: string, id: string) {
+  const still = getStill(owner, id)
+  if (stillRole(still) === 'input') return still
+  const path = stillPath(owner, still.id)
+  if (!existsSync(path)) throw createError({ statusCode: 404, statusMessage: 'Image file missing' })
+  const data = readFileSync(path)
+  const name = (still.name || still.filename.replace(/\.[a-z0-9]+$/i, '') || 'still').trim().slice(0, 80)
+  const base = lastFrameStillName(name) || clipIdFromStillFilename(`${name}.png`) ? 'still' : name
+  const saved = await saveStill({
+    ownerKey: owner,
+    folderId: still.folderId,
+    filename: `${base}.png`,
+    data,
+    width: still.width,
+    height: still.height,
+    hideInput: still.hideInput,
+    role: 'input',
+    name
+  })
+  if (!saved) throw createError({ statusCode: 400, statusMessage: 'Could not save that still as input' })
+  return saved
+}
+
 export async function rememberInputStill(params: {
   ownerKey: string
   folderId: string