Allow milestones to be closed and reopened

crates/app/src/presentation.rs

@@ -148,6 +148,7 @@ pub struct MilestoneEditorPage {
     pub title: String,
     pub description: String,
     pub due_date: Option<i64>,
+    pub closed: bool,
 }
 
 #[derive(Clone, uniffi::Record)]
@@ -424,6 +425,10 @@ pub fn milestone_editor_page(milestone: Option<models::Milestone>) -> MilestoneE
             .as_ref()
             .and_then(|milestone| milestone.due_on.as_deref())
             .and_then(parse_api_date),
+        closed: milestone
+            .as_ref()
+            .and_then(|milestone| milestone.state.as_deref())
+            == Some("closed"),
     }
 }
 
@@ -1628,13 +1633,17 @@ mod tests {
             title: Some("Version 1".into()),
             description: Some("Ship it".into()),
             due_on: Some("2024-02-29T12:34:56Z".into()),
+            state: Some("closed".into()),
             ..Default::default()
         }));
         assert_eq!(page.title, "Version 1");
         assert_eq!(page.description, "Ship it");
         assert_eq!(page.due_date, Some(1_709_164_800));
+        assert!(page.closed);
 
-        assert_eq!(milestone_editor_page(None).due_date, None);
+        let new = milestone_editor_page(None);
+        assert_eq!(new.due_date, None);
+        assert!(!new.closed);
     }
 
     #[test]