only show read notifications for last 30 days

src/model/notification.rs

@@ -58,7 +58,16 @@ impl Notification {
     pub async fn for_user(db: &SqlitePool, user: &User) -> Vec<Self> {
         sqlx::query_as!(
             Self,
-            "SELECT * FROM notification WHERE user_id = ? ORDER BY created_at DESC",
+            "
+SELECT * FROM notification 
+WHERE 
+  user_id = ? 
+  AND (
+    read_at IS NULL 
+    OR read_at >= datetime('now', '-30 days')
+  ) 
+ORDER BY read_at DESC, created_at DESC;
+            ",
             user.id
         )
         .fetch_all(db)