The notes listing renders each thread link as
/msg/pms/{folder}/{noteID}/#message. extractIntFromHref returned the
first numeric segment it found, which was always the folder index (1
for the inbox), so every NotePreview.ID came out as 1 and any
follow-up GetNote(np.ID) call failed with "this message has either
been deleted or is not yours".
Surfaced by an end-to-end smoke run against the live site. Limited
to the notes parser; the other extractIntFromHref callers
(/view/{id}/, /journal/{id}/) only ever have a single numeric segment
so they are unaffected.
