Restore pre-text and post-text with Use as input and Details.

Library items already stored those fields, but Details showed one blob and Use as input left the form's empty pre/post in place.

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

utils/libraryBrowse.ts

@@ -23,6 +23,8 @@ export type LibraryStill = {
   role?: 'input' | 'output'
   name?: string
   prompt?: string
+  promptPre?: string
+  promptPost?: string
   familyId?: string
   parentStillId?: string
   chainIndex?: number
@@ -34,6 +36,8 @@ export type LibraryClip = {
   folderId: string
   name?: string
   prompt: string
+  promptPre?: string
+  promptPost?: string
   aspect: string
   width: number
   height: number