nordisk/holger

mannequin GUI — look-preset switcher as a remote-controllable atom

The mannequin egui GUI (mannequin/src/gui.rs) draws a look-&-feel preset switcher (Windows/macOS/Device, light+dark) as a row of selectable_labels. Until now the click result lived only in self.look_preset — not observable, so a robot couldn't assert it. This closes that gap per the north-star (every UI atom remote-controllable + tested in code, AI-free at runtime).

What changed

• MannequinGui::state_json() (LAW 6) exposes the app-level atoms as data: { look_preset, look_name, preset_count, selected_system }.
• The drivable half already existed: set_look_preset(idx) -> String (clamped) and the facett SystemChart::select.
• mannequin/tests/look_preset_robot.rs drives set_look_preset in code and asserts state_json reflects it (index round-trips, look_name matches, an out-of-range index clamps — never panics). Emits a nornir-testmatrix cell (holger-mannequin/gui :: look_preset_switcher_remote_drivable) behind the additive testmatrix feature — reuses edda, no hand-rolled harness.

Flow

set_look_preset(i) ──▶ MannequinGui.look_preset ──▶ state_json{look_preset,look_name}
        (drive, in code)                                   │
                                                           ▼
                                    robot assert ── + ── nornir-testmatrix cell
                                    (no display, no AI — self-driving)

Green: default cargo test -p holger-mannequin (gui_robot 3 + look_preset 1) and --features testmatrix.