Issue: Blank form when tabs change dynamically
Problem:
- When product type changes (simple → variable)
- Tabs array changes (adds/removes variations tab)
- activeTab state still points to old tab ID
- If old tab ID doesn't exist, no section shows
- Result: Blank form
Fix:
- Added useEffect to watch tabs array
- Check if current activeTab exists in new tabs
- If not, reset to first tab (tabs[0].id)
- Ensures valid activeTab always
Example:
- Initial: tabs = [general, inventory, organization]
- activeTab = 'general' ✅
- Type changes to variable
- New tabs = [general, inventory, variations, organization]
- activeTab still 'general' ✅ (exists, no change)
- But if activeTab was 'variations' and type changed to simple
- Old activeTab 'variations' doesn't exist
- Reset to 'general' ✅
Result:
✅ Form always shows active section
✅ Handles dynamic tab changes
✅ No blank forms
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