Feat: more predictable projet load behavior

crates/project/src/file.rs

@@ -25,6 +25,8 @@ struct ProjectFile {
     sample_paths: Vec<PathBuf>,
     #[serde(default = "default_tempo")]
     tempo: f64,
+    #[serde(default)]
+    playing_patterns: Vec<(usize, usize)>,
 }
 
 fn default_tempo() -> f64 {
@@ -38,6 +40,7 @@ impl From<&Project> for ProjectFile {
             banks: project.banks.clone(),
             sample_paths: project.sample_paths.clone(),
             tempo: project.tempo,
+            playing_patterns: project.playing_patterns.clone(),
         }
     }
 }
@@ -48,6 +51,7 @@ impl From<ProjectFile> for Project {
             banks: file.banks,
             sample_paths: file.sample_paths,
             tempo: file.tempo,
+            playing_patterns: file.playing_patterns,
         };
         project.normalize();
         project

crates/project/src/project.rs

@@ -450,6 +450,8 @@ pub struct Project {
     pub sample_paths: Vec<PathBuf>,
     #[serde(default = "default_tempo")]
     pub tempo: f64,
+    #[serde(default)]
+    pub playing_patterns: Vec<(usize, usize)>,
 }
 
 fn default_tempo() -> f64 {
@@ -462,6 +464,7 @@ impl Default for Project {
             banks: (0..MAX_BANKS).map(|_| Bank::default()).collect(),
             sample_paths: Vec::new(),
             tempo: default_tempo(),
+            playing_patterns: Vec::new(),
         }
     }
 }