fifa17 SBC: keep repeatable challenges re-enterable after completion

The FIFA 17 client gates challenge re-entry on timesCompleted, not on the
repeatable flag: a nonzero count renders the tile COMPLETED and refuses re-entry
even when repeatable=true. So a repeatable challenge now always projects
timesCompleted=0 (challenges_body) and its set as challengesCompletedCount=0
(sets_body); a non-repeatable challenge keeps its true count and stays locked
once completed. Core keeps the authoritative completion record — economy is
unaffected; this is presentation only.

Live-proven on the retail client 2026-08-18: a completed repeatable Bronze
Upgrade now re-opens for a fresh submit instead of blocking. Regression test
repeatable_completed_challenge_stays_enterable added; adapter + full host suite
(incl. differential and the concurrency race) green.

openfut-adapter-fifa17/src/fut/sbc.rs

@@ -66,7 +66,7 @@ pub fn sets_body(challenges: &[ChallengeView]) -> Value {
                 "description": challenge.description,
                 "priority": challenge.identity.priority,
                 "challengesCount": 1,
-                "challengesCompletedCount": i64::from(challenge.times_completed > 0),
+                "challengesCompletedCount": i64::from(!challenge.repeatable && challenge.times_completed > 0),
                 "awards": [],
                 "hidden": false,
                 "endTime": 4_102_444_800_i64
@@ -89,6 +89,17 @@ pub fn challenges_body(set_id: i64, challenges: &[ChallengeView]) -> Value {
         .iter()
         .filter(|challenge| challenge.identity.set_id == set_id)
         .map(|challenge| {
+            // A repeatable challenge is always available to enter again. The FIFA 17
+            // client gates challenge re-entry on `timesCompleted` (not on `repeatable`):
+            // a nonzero count renders the tile COMPLETED and refuses re-entry. So a
+            // repeatable challenge never reports itself as terminally completed here.
+            // Core keeps the true completion record (economy authority); this is
+            // presentation only. Live-proven on the retail client 2026-08-18.
+            let times_completed = if challenge.repeatable {
+                0
+            } else {
+                challenge.times_completed
+            };
             json!({
                 "challengeId": challenge.identity.challenge_id,
                 "setId": challenge.identity.set_id,
@@ -103,7 +114,7 @@ pub fn challenges_body(set_id: i64, challenges: &[ChallengeView]) -> Value {
                 "repeatable": challenge.repeatable,
                 "trophyId": 0,
                 "status": "OPEN",
-                "timesCompleted": challenge.times_completed,
+                "timesCompleted": times_completed,
                 "awards": [],
                 "elgReq": []
             })
@@ -246,6 +257,52 @@ mod tests {
         assert!(submit["grantedSetAwards"].is_array());
     }
 
+    #[test]
+    fn repeatable_completed_challenge_stays_enterable() {
+        // The FIFA 17 client refuses challenge re-entry when timesCompleted > 0, so
+        // a repeatable challenge must always project as not-yet-completed while a
+        // non-repeatable one keeps its true count. Core holds the real record.
+        let repeatable = ChallengeView {
+            identity: CHALLENGES[0],
+            name: "Bronze Upgrade".into(),
+            description: "Submit players".into(),
+            repeatable: true,
+            times_completed: 3,
+        };
+        let once = ChallengeView {
+            identity: CHALLENGES[1],
+            name: "Hybrid Nations".into(),
+            description: "Submit a hybrid squad".into(),
+            repeatable: false,
+            times_completed: 1,
+        };
+
+        let repeatable_view = challenges_body(CHALLENGES[0].set_id, &[repeatable.clone()]);
+        assert_eq!(repeatable_view["challenges"][0]["timesCompleted"], 0);
+        assert_eq!(repeatable_view["challenges"][0]["status"], "OPEN");
+        let once_view = challenges_body(CHALLENGES[1].set_id, &[once.clone()]);
+        assert_eq!(once_view["challenges"][0]["timesCompleted"], 1);
+
+        let sets = sets_body(&[repeatable, once]);
+        let sets_arr = sets["categories"][0]["sets"].as_array().unwrap();
+        let repeatable_set = sets_arr
+            .iter()
+            .find(|set| set["setId"] == CHALLENGES[0].set_id)
+            .unwrap();
+        let once_set = sets_arr
+            .iter()
+            .find(|set| set["setId"] == CHALLENGES[1].set_id)
+            .unwrap();
+        assert_eq!(
+            repeatable_set["challengesCompletedCount"], 0,
+            "a repeatable set never reports itself terminally completed"
+        );
+        assert_eq!(
+            once_set["challengesCompletedCount"], 1,
+            "a one-shot set counts its single completion"
+        );
+    }
+
     #[test]
     fn parser_accepts_only_known_squad_containers_and_item_ids() {
         let normal = br#"{"players":[{"index":0,"itemData":{"id":100000001}},{"index":1,"itemData":{"id":0}}]}"#;