- CreateAutoTunedChannelsRequest.ToCommand(): guard null Channels (was NREing on
a request body that omits "channels", causing HTTP 500).
- CreateAutoTunedChannelsHandler.CreateOne: when CreateChannelFromLineup returns
Left (Skipped/Failed), roll back the just-created SmartCollection via
DeleteSmartCollection so retries don't fail on SmartCollection-name uniqueness.
Best-effort; the delete result does not change the outcome.
- PreviewAutoTuneChannelsHandler: filter out proposals whose generated name
exceeds the 50-char Channel.Name limit before number allocation, so numbers
aren't wasted on proposals that can never be created.
- docs/superpowers/specs/2026-07-16-auto-tuning-design.md: fix field-name drift
in JSON examples (proposedNumber -> number, error -> reason) to match the
actual AutoTuneProposal/AutoTuneChannelOutcome DTOs.
Refs #69
timothy
f31476e012