Implements comprehensive validation feedback system for tree editor:
Task A.1 - Circular Reference Detection:
- Added detectCircularRefs() function in treeEditorStore
- Detects loops in both decision options and action next_node_id chains
- Prevents infinite navigation paths
Task A.2 - ValidationSummary Component:
- Created collapsible panel showing error/warning count
- Click error to select problematic node
- Color-coded: red for errors, yellow for warnings
- Icon indicators (AlertCircle, AlertTriangle)
Task A.3 - TreeEditorPage Integration:
- Added ValidationSummary component display
- Save button disabled when errors exist
- Warnings are informational only (don't block save)
- Added manual "Validate" button in toolbar
- Imported CheckCircle2 icon for validate button
Task A.4 - Visual Node Error Indicators:
- Added error/warning badges on problem nodes
- Tooltip on hover showing specific error messages
- Red ring for errors, yellow ring for warnings
- Shows count of errors/warnings per node
All tasks from implementation plan completed.
Build tested successfully.
Related: Issue #1
Co-Authored-By: Claude Sonnet 4.5 <noreply@anthropic.com>
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