36cbe62fe1
status / cancel / list_providers were near-identical across GenerateAudio,
GenerateImage and GenerateModel (differing only by a kind label + poll
interval), and NormalizeOutputFolder was a verbatim triple copy.
- New AssetGenToolHelpers.{Status,Cancel,ListProviders} — the three tools now
delegate, passing their kind label / poll interval.
- NormalizeOutputFolder moved to AssetGenPaths (it already lived on
TryGetAssetsFolder).
- Behaviour preserved (image `remove_background` arm kept; provider-list
filtering unchanged). Net -120 lines of duplication.
Verified: EditMode 1167 tests / 0 failures + in-editor smoke (audio/image/model
list_providers, status/cancel error paths, image remove_background all intact).
Claude-Session: https://claude.ai/code/session_015KYy51gwBuhDuLZXXoqc98