implement error view which displays all error on the display

src/views/card_view.rs

@@ -2,7 +2,9 @@ use crate::display::sprite::render_sprite_onto_ili9341;
 use crate::navigation::navigation::NewState;
 use crate::navigation::outputs::Outputs;
 use crate::peripherals::Peripherals;
+use alloc::boxed::Box;
 use alloc::format;
+use core::error;
 use embedded_graphics::mono_font::MonoTextStyle;
 use embedded_graphics::mono_font::ascii::FONT_6X10;
 use embedded_graphics::pixelcolor::Rgb565;
@@ -30,7 +32,7 @@ impl Navigable for CardView {
         &self,
         outputs: &mut Outputs,
         _: &Peripherals,
-    ) -> impl core::future::Future<Output = ()> + Send {
+    ) -> impl core::future::Future<Output = Result<(), Box<dyn error::Error>>> + Send {
         async move {
             let display = &mut outputs.primary_display;
             display.clear(Rgb565::BLACK).unwrap();
@@ -100,6 +102,7 @@ impl Navigable for CardView {
 
             let palette: Palette = self.card.cardtype.clone().into();
             render_sprite_onto_ili9341(display, self.card.sprite.data.as_slice(), &palette);
+            Ok(())
         }
     }