wip: checkpoint multi-game core work

src/services/fut_champs.rs

@@ -239,16 +239,30 @@ pub async fn claim_rivals_reward(
     pack_defs: &[PackDefinition],
 ) -> AppResult<serde_json::Value> {
     // Fetch current season row (must exist)
-    let row: Option<(i64, i64, i64)> = sqlx::query_as(
-        "SELECT division, rivals_week_claimed, rivals_total_points FROM seasons WHERE profile_id = ?",
+    let row: Option<(i64, i64, i64, Option<String>)> = sqlx::query_as(
+        "SELECT division, rivals_week_claimed, rivals_total_points, rivals_last_claimed_at \
+         FROM seasons WHERE profile_id = ?",
     )
     .bind(profile_id)
     .fetch_optional(pool)
     .await?;
 
-    let (division, week_claimed, total_pts) =
+    let (division, week_claimed, total_pts, last_claimed_at) =
         row.ok_or_else(|| AppError::NotFound("no season found — play a match first".into()))?;
 
+    // Enforce 24-hour cooldown between weekly reward claims
+    if let Some(ref last_claimed) = last_claimed_at {
+        if let Ok(last_time) = chrono::DateTime::parse_from_rfc3339(last_claimed) {
+            let elapsed = chrono::Utc::now() - last_time.with_timezone(&chrono::Utc);
+            if elapsed < chrono::Duration::hours(24) {
+                let hours_remaining = 24 - elapsed.num_hours();
+                return Err(AppError::Conflict(format!(
+                    "rivals weekly reward already claimed; try again in ~{hours_remaining}h"
+                )));
+            }
+        }
+    }
+
     let next_week = week_claimed + 1;
     let coins = rivals_weekly_coins(division);
     let new_balance = club_svc::add_coins(pool, club_id, coins).await?;
@@ -271,11 +285,13 @@ pub async fn claim_rivals_reward(
         None
     };
 
+    let now = chrono::Utc::now().to_rfc3339();
     sqlx::query(
-        "UPDATE seasons SET rivals_week_claimed = ?, rivals_total_points = rivals_total_points + 100 \
-         WHERE profile_id = ?",
+        "UPDATE seasons SET rivals_week_claimed = ?, rivals_total_points = rivals_total_points + 100, \
+         rivals_last_claimed_at = ? WHERE profile_id = ?",
     )
     .bind(next_week)
+    .bind(&now)
     .bind(profile_id)
     .execute(pool)
     .await?;