When the server leaves the negative undecided, the workspace fills it from
the legacy browser parser (comfy-metadata.js), which follows
ConditioningZeroOut back to its input and so reads the positive text as
the negative. The workspace now checks the prompt graph first:
- every sampler's negative is a ConditioningZeroOut (Reroutes allowed):
the negative shows the server's explicitly empty zeroed state
({status: resolved, text: "", source: zeroed-conditioning});
- a zero-out elsewhere in a negative path (one branch zeroed, another
encoded; a zero-out combined with other conditioning), or a
workflow-only file holding one: the negative is not filled and keeps
the server's status;
- graphs without a zero-out keep the legacy fill unchanged.
comfy-metadata.js is untouched; the legacy pages keep their reading.