NetBBS v7.19.1

NetBBS v7.19.1

This patch release makes chat-bot settings selectable in the SysOp console and
restores the catalogue menu formatting. Nothing migrates: the node database
stays at schema 130, and the Link, real-time, door API, career and world
versions are unchanged. Upgrading is a wheel swap and a restart; rolling back
to v7.19.0 is the reverse.

Bot settings are selectable (PR #1235)

Chat-bot settings that contain channels, boards or file areas now open a
picker. Multiple selections can be toggled while paging and searching, and
the draft remains unchanged until the bot editor is saved. A channel removal
also clears dependent grants and an announcement destination from that draft.
Unavailable existing grants remain visible so a SysOp can remove them without
silently regranting anything. The announcement destination has an explicit
(none) choice.

The picker now supports this toggle interaction as a reusable editor control.
Its catalogue title, breadcrumb and descriptions follow the console's current
menu preferences, including narrow-terminal fitting. Hidden, MRC and
ineligible inherited resources are excluded from new grants.

Upgrade and rollback

Stop NetBBS, replace the wheel and start it. No migration runs, and no setting
or config key is added. Rolling back to v7.19.0 is the reverse.

Verification boundaries

• The bot settings UI and reusable picker regression tests cover selection,
  paging, search, discard-before-save, stale grants, dependent-grant cleanup,
  resource filtering and 40/80-column catalogue fitting.
• The focused bot and picker regression set passed: 61 passed. The full
  Windows suite produced 11,754 passed and 136 skipped, with one unrelated
  failure in test_link_key_rotation.py::test_a_backup_checksums_the_retired_keys
  because the existing user-level Voidrunner save directory rejected creation
  of .maintenance.lock (PermissionError).
• NetBSD, real-terminal and live multi-node operational checks remain manual
  evidence; this patch does not change those boundaries.