002 fmt ln nested

// TEST: fmt:ln invoked NESTED in a continuation — position must be irrelevant.
//
// Twin of 620_001 (fmt:ln at top level, as a subflow RHS — the
// flow.invocation position). Same transform, same format string, but the
// invocation sits inside a continuation. Pins the transform-layer
// position-duality bug family: fmt.kz's non-top-level path currently
// returns `.{ .formatted = undefined }` without transforming, so the
// nested invocation never fires.

~import std/fmt
~import std/io

~event get-name {}
| name []const u8

~proc get-name|zig {
    return .{ .name = "World" };
}

~get-name()
| name n |> std/fmt:ln("Hello, {{ n:s }}!")
    | line l |> std/io:print.ln(l.text)