Feat: demo songs

src/state/options.rs

@@ -27,6 +27,7 @@ pub enum OptionsFocus {
     MidiInput2,
     MidiInput3,
     ResetOnboarding,
+    LoadDemoOnStartup,
 }
 
 impl CyclicEnum for OptionsFocus {
@@ -55,6 +56,7 @@ impl CyclicEnum for OptionsFocus {
         Self::MidiInput2,
         Self::MidiInput3,
         Self::ResetOnboarding,
+        Self::LoadDemoOnStartup,
     ];
 }
 
@@ -77,6 +79,7 @@ const STANDALONE_ONLY: &[OptionsFocus] = &[
     OptionsFocus::MidiInput2,
     OptionsFocus::MidiInput3,
     OptionsFocus::ResetOnboarding,
+    OptionsFocus::LoadDemoOnStartup,
 ];
 
 /// Section layout: header line, divider line, then option lines.
@@ -113,6 +116,7 @@ const FULL_LAYOUT: &[(OptionsFocus, usize)] = &[
     (OptionsFocus::MidiInput3, 39),
     // blank=40, ONBOARDING header=41, divider=42
     (OptionsFocus::ResetOnboarding, 43),
+    (OptionsFocus::LoadDemoOnStartup, 44),
 ];
 
 impl OptionsFocus {