Two issues on the Process Tree client action:
1. Back to Work Order kept growing breadcrumbs (WO -> Tree -> WO ->
Tree -> ...) because onBack used action.doAction() which PUSHES
a new act_window onto the stack instead of popping. Fixed by
trying action.restore() first (pops the Tree off the stack and
returns to the parent WO/Step controller). Falls through to
explicit doAction only when there's no parent in the stack
(direct URL access).
2. The empty-state banner referenced productionId, a dead variable
from the bridge_mrp era when the tree was tied to mrp.production.
Since the component now uses jobId (fp.job context key), the
"No manufacturing order selected" message ALWAYS fired regardless
of whether a job was loaded. Fixed by using jobId and updating
the message to "No work order selected".
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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