fix(dispatch): clean up transient library upload from Direct-Print flow (#730)

The "Print" button on a printer card (and drag-drop-onto-card) used
  FileUploadModal to persist the file as a LibraryFile, then dispatched
  through POST /library/files/{id}/print. The LibraryFile row + disk file
  were left behind after every one-off print, polluting File Manager with
  entries the user never asked to save.

  FilePrintRequest.cleanup_library_after_dispatch (default False) opts
  into post-dispatch cleanup. When set, _run_print_library_file stages
  db.delete(lib_file) in the same transaction as archive_print so a
  mid-flight FTP / start_print failure rolls both back cleanly, commits
  together, then unlinks the library disk file + thumbnail after commit
  succeeds. External library files (is_external=True) are never touched.

  Only the Printers-page Direct-Print PrintModal sets the flag. Every
  other api.printLibraryFile caller (File Manager Print, Project Detail
  Print) leaves it unset — their entries are there by user intent.

  Also moves formatPrintName out of PrintersPage.tsx into a new
  utils/printName.ts module — fa1c46d9 (#881) exported it inline so its
  test could import it, tripping react-refresh/only-export-components.

frontend/src/components/PrintModal/index.tsx

@@ -49,6 +49,7 @@ export function PrintModal({
   onClose,
   onSuccess,
   projectId,
+  cleanupLibraryAfterDispatch,
 }: PrintModalProps) {
   const { t } = useTranslation();
   const queryClient = useQueryClient();
@@ -737,6 +738,7 @@ export function PrintModal({
                   ams_mapping: printerMapping,
                   ...printOptions,
                   project_id: projectId,
+                  cleanup_library_after_dispatch: cleanupLibraryAfterDispatch,
                 });
               } else {
                 // project_id is intentionally omitted here: reprintArchive targets an existing

frontend/src/components/PrintModal/types.ts

@@ -34,6 +34,9 @@ export interface PrintModalProps {
   onSuccess?: () => void;
   /** Project ID to associate the resulting archive with (only when triggered from project view) */
   projectId?: number;
+  /** Delete the LibraryFile after dispatch — used by the Printers-page Direct-Print flow
+   *  so transient uploads don't linger in File Manager. Only applies to library-file prints. */
+  cleanupLibraryAfterDispatch?: boolean;
 }
 
 /**