The branch threshold over src/nest/** dipped to 79.89% after the move: the new
*.rpc.ts files carry the defensive branches the router closures had (?? '',
|| current, optional cascades), and none of them were exercised.
Adds the cases that reach them: a booking whose cascade does not fire, an update
that keeps the stored title, a bag colour of the wrong type, a non-array userIds,
a missing bag across all three bag writes, and the block delete without a partner
reservation. Also corrects two assumptions I had written into the booking tests:
title and type are required by the shared schema, so the handler's own fallbacks
sit behind it as defence in depth rather than as the first line.
Nine more methods, so the registry owns 24 of 113.
The #858 privacy logic existed three times: PackingService had the primitives, the
controller layered emitToViewers and broadcastUpdate on top privately, and the
plugin deps factory carried a standalone copy of all four, with a comment asking
for them to be kept in lockstep by hand. Migrating packing meant either copying
them a fourth time or fixing that, so the two private controller methods moved
into PackingService and the factory copy is gone. Controller and PackingRpc now
call the same code, and the controller suite proves it by passing with all 45
assertions unchanged.
The four public/private transitions get one test each, because each one is a way
to leak a private item to the whole trip room, plus a test that the privacy is
read before the write rather than after: reading it afterwards would report
"already private", skip the room delete, and leave the item on every member's
screen.
Maurice