- Add _repair_tree() post-build pass that fixes structural issues caused by
placed-set race conditions: demotes decisions with <2 children to actions,
hoists orphaned children as siblings, converts dead-end actions to solutions
- Add validation gate at commit endpoint — rejects trees that fail validation
with a 422 and descriptive error messages instead of saving invalid trees
- Update test fixtures to create valid multi-node tree structures
- Frontend: initialize currentNodeId from tree's actual root ID instead of
hardcoded 'root', fixing "Invalid tree structure" for KB-generated trees
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Decision nodes with fewer than 2 buildable child targets now get
demoted to action nodes instead of creating invalid tree structures.
Also adds id fields to option objects (required by tree editor).
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
- Fix _build_troubleshooting_tree() to handle deep nesting, warning nodes,
and DAG deduplication (placed set prevents duplicate IDs)
- Fix step_sync VARCHAR(255) overflow on publish by truncating title
- Add "Approve All" button to KB review screen
- Add delete button (hover-reveal) to flow canvas nodes
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
