feat(eckhart): implement single_page flow

[no changelog]

core/embed/rust/src/ui/layout_eckhart/flow/mod.rs

@@ -15,6 +15,7 @@ pub mod request_passphrase;
 pub mod show_danger;
 pub mod show_share_words;
 pub mod show_thp_pairing_code;
+pub mod util;
 
 #[cfg(feature = "universal_fw")]
 pub use confirm_fido::new_confirm_fido;

core/embed/rust/src/ui/layout_eckhart/flow/util.rs

@@ -0,0 +1,40 @@
+use crate::{
+    error::Error,
+    maybe_trace::MaybeTrace,
+    ui::{
+        component::Component,
+        flow::{
+            base::{Decision, DecisionBuilder},
+            FlowController, FlowMsg, Swipable, SwipeFlow,
+        },
+        geometry::Direction,
+    },
+};
+
+enum SinglePage {
+    Show,
+}
+
+impl FlowController for SinglePage {
+    #[inline]
+    fn index(&'static self) -> usize {
+        0
+    }
+
+    fn handle_swipe(&'static self, _direction: Direction) -> Decision {
+        self.do_nothing()
+    }
+
+    fn handle_event(&'static self, msg: FlowMsg) -> Decision {
+        self.return_msg(msg)
+    }
+}
+
+pub fn single_page<T>(layout: T) -> Result<SwipeFlow, Error>
+where
+    T: Component<Msg = FlowMsg> + Swipable + MaybeTrace + 'static,
+{
+    let mut flow = SwipeFlow::new(&SinglePage::Show)?;
+    flow.add_page(&SinglePage::Show, layout)?;
+    Ok(flow)
+}