Conventions

Naming

fb prefix on database tables: fbPallet, fbShipping, fbShippingItem, etc.
Dto suffix for DTOs wrapping nopCommerce entities: OrderDto, OrderItemDto, ProductDto.
XxxItemPallet for measurement records: ShippingItemPallet, OrderItemPallet, StockTakingItemPallet.
Grid prefix for Blazor grid components: GridPartnerBase, GridShippingBase, etc.
SignalRTags constants use numeric ranges by domain (see FruitBank.Common/SignalRs/).

MeasuringItemPalletBase as abstract base for all three measurement hierarchies.
GenericAttributes for extending nopCommerce entities with custom data (IsMeasurable, Tare, AverageWeight).
Composition interfaces for measurement traits: IMeasuringValues = IMeasuringWeights + IMeasuringQuantity.
DevExpress DxGrid with AcSignalRDataSource for real-time grid data.
MgGridBase for grid layout persistence via localStorage.
FruitBankSignalRClient as single hub client for all server communication.
DatabaseClient for client-side caching with ConcurrentDictionary tables.

Before writing new code, search the codebase for existing implementations.
If a method does most of what you need, extract the shared part into a smaller reusable method rather than copying and modifying.
Prefer composing existing helpers over creating parallel implementations.

MeasuringStatus.Finnished — intentional legacy typo. Do NOT fix.
Shipping = INBOUND, Order = OUTBOUND — never confuse directions.
Pallet = measurement record — always created, even for non-measurable products.
NetWeight is calculated, never stored — GrossWeight − PalletWeight − (TrayQuantity × TareWeight).
DLL references to AyCode projects are intentional — do not convert to ProjectReference.
Do not suggest removal/rollback as a solution — find a fix.