Slack Block Kit buttons only support style primary (green) / danger (red) /
default (white). The relay approval + slash-confirm prompts emitted an invalid
style 'success' (Slack silently drops it → white/stroke button) and baked
emoji into the labels (non-native). Native Slack Hermes uses plain labels with
primary/danger. Map to valid styles (once→primary, deny/cancel→danger,
session/always→default) and drop the emoji from labels. The connector already
compensates success→primary, but emitting valid values at the source is correct
and removes the fragile dependency on that compensation.
Victor Kyriazakos
42e4f70eef