Recapture the mouse after selecting a venue

_start_shift() now calls _refresh_freeze(), clearing the start-menu input lock
and returning to captured mouse mode. The movement smoke asserts both and no
longer captures the mouse itself. Headless 226/226 and smoke_movement pass in a
clean worktree; only this game_manager hunk is staged, not the active realism
edits.

src/test/smoke_movement.gd

@@ -29,7 +29,9 @@ func _process(_delta: float) -> bool:
 		return false
 	if not started:
 		gm.call("_on_venue_selected", "hollywood_building")
-		Input.set_mouse_mode(Input.MOUSE_MODE_CAPTURED)
+		_check(not gm.guard.input_locked, "venue selection releases the guard")
+		_check(Input.get_mouse_mode() == Input.MOUSE_MODE_CAPTURED,
+			"venue selection recaptures the mouse")
 		started = true
 		return false
 	if frame > MAX_FRAMES: