E0332: @web.Get on a type without @ui.Island

@web.Get on a type serves the type's component, so the type must be an island: @ui.Island (bare, or naming the file). A handler that writes the page itself is a function.

Wrong

@web.Get("/orders")
type Orders struct{ Rows []Order }

Right

@web.Get("/orders")
@ui.Island
type Orders struct{ Rows []Order }