Declarations and native access

P.Text, P.Button, P.Vertical, P.Horizontal and every catalog factory return deferred View declarations. Mount builds each occurrence once, then applies props and references before activation.

API	Behavior
view.With(params View[])	Immutable child/modifier composition.
view.With(Func<IEnumerable<View>>)	Tracked child collection with retained declaration identity.
P.Self(view)	Explicit same-GameObject placement.
P.Declare<T>(configure, reference, modifier, active)	Custom native component using the same ownership rules.
P.Mount(view) / P.Mount(Func<View>)	Explicit mount with scope, native root and canvas.
reference: Action<NativeType>	Capture the built native component before activation.
configure: Action<NativeType>	One-time native configuration after named props and children.

UnityEngine.UI.Button native = null;
var view = P.Button("Save", reference: button => native = button);
using var mount = P.Mount(view);
native.onClick.Invoke();

The imperative P.Create<T>, P.Apply, P.Bind, typed property groups and custom native events remain available for advanced integration. They return live native components and require an ownership scope. Their TextProperty, VerticalProperty and HorizontalProperty helpers have distinct names from the new view factories. Do not mix imperative property entries into .With; use named props or configure instead.