add rank

src/model/highscore.rs

@@ -1,7 +1,7 @@
 use crate::Backend;
 
 pub(crate) struct Rank {
-    pub(crate) rank: usize,
+    pub(crate) rank: i64,
     pub(crate) name: Option<String>,
     pub(crate) uuid: String,
     pub(crate) amount: i64,
@@ -9,6 +9,7 @@ pub(crate) struct Rank {
 
 impl Backend {
     pub(crate) async fn highscore(&self) -> Vec<Rank> {
+        // TODO: proper rank calculation
         match self {
             Backend::Sqlite(db) => sqlx::query_as!(
                 Rank,