Shift+C issues prototype contract via contract_client; contract_hud_controller
shows encounter objective, deny copy, and completion reward transition.
Includes scene wiring, GdUnit tests, manual QA, and README.
Documents E7M4-10 scope, adopted kickoff decisions (separate contract_hud_controller,
fixed prototype_contract_dev_seed), file lists, and test plan ahead of Godot work.
VinPropane