Replace the 3-dialog chain (category → description → projects) with a
single SchemaFormDialog that fetches schema data from the Silo REST API
and builds the UI dynamically at runtime.
New dialog features:
- Two-stage category picker (domain combo → subcategory combo)
- Dynamic property fields grouped by domain and common defaults
- Collapsible form sections (Identity, Sourcing, Details, Properties)
- Live part number preview via POST /api/generate-part-number
- Item type selection (part, assembly, consumable, tool)
- Sourcing fields (type, cost, URL)
- Project tagging via multi-select list
- Widget factory: string→QLineEdit, number→QDoubleSpinBox+unit,
boolean→QCheckBox
The form mirrors the React CreateItemPane.tsx layout and uses the same
API endpoints:
- GET /api/schemas/kindred-rd (category enum values)
- GET /api/schemas/kindred-rd/properties?category={code}
- GET /api/projects
- POST /api/items (via _client.create_item)
PySide6 requires the proper enum type QtCore.Qt.WindowModal, not the
raw integer 2. The integer form was accepted by PySide2/Qt5 but raises
TypeError in PySide6.
