Adds an offline BBS accessible via Direct Message to the node's own key.
Access is channel-based: anyone seen on a configured BBS channel is
automatically whitelisted for DM access. Channels stay clean.
- Multi-channel configuration: any combination of device channels can be
selected; senders on any of them are auto-whitelisted
- Short syntax: !p <cat> <text> and !r [cat] alongside full !bbs syntax
- Category abbreviations computed automatically (shortest unique prefix)
- handle_channel_msg: bootstrap reply on channel + auto-whitelist sender
- handle_dm: DM entry point, checks whitelist, routes to post/read/help
- DM reply routed back to sender via command_sink
- SQLite message store with WAL mode and configurable retention
Adds an offline Bulletin Board System accessible via Direct Message to
the node's own key. All BBS commands (!p, !r, !bbs) are handled directly
in EventHandler.on_contact_msg, independent of MeshBot.
- One node = one board; settings reduced to a single channel selector
- Short syntax: !p <cat> <text> and !r [cat] alongside full !bbs syntax
- Category abbreviations computed automatically (shortest unique prefix)
- !r and !bbs help always include the abbreviation table in the reply
- DM reply routed back to sender via command_sink
- SQLite message store with WAL mode and configurable retention
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