Phase 9: division/season tracking, club customization, pack history, notifications

- GET /division returns live season stats (points, record, promotion threshold)
- PUT /club allows updating club name and manager_name
- GET /packs/history returns opened packs with full card definitions
- GET /notifications dynamically surfaces completed objectives, expiring loans, season end
- Club model gains manager_name column (migration 0006 already added it)
- Pack model gains opened_cards and opened_at; pack SELECT queries updated
- 9 new integration tests — all 45 pass, clippy clean

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

src/services/pack.rs

@@ -39,6 +39,8 @@ pub async fn grant_pack(pool: &Pool, club_id: &str, definition_id: &str) -> AppR
         definition_id: definition_id.to_string(),
         opened: false,
         created_at: chrono::Utc::now().to_rfc3339(),
+        opened_cards: None,
+        opened_at: None,
     };
     sqlx::query(
         "INSERT INTO packs (id, club_id, definition_id, opened, created_at) VALUES (?, ?, ?, ?, ?)",
@@ -61,7 +63,7 @@ pub async fn open_pack(
     pack_id: &str,
 ) -> AppResult<PackOpenResult> {
     let pack = sqlx::query_as::<_, Pack>(
-        "SELECT id, club_id, definition_id, opened, created_at FROM packs WHERE id = ? AND club_id = ?"
+        "SELECT id, club_id, definition_id, opened, created_at, opened_cards, opened_at FROM packs WHERE id = ? AND club_id = ?"
     )
     .bind(pack_id)
     .bind(club_id)
@@ -122,7 +124,13 @@ pub async fn open_pack(
         }
     }
 
-    sqlx::query("UPDATE packs SET opened = 1 WHERE id = ?")
+    let card_ids_json = serde_json::to_string(&cards.iter().map(|c| &c.id).collect::<Vec<_>>())
+        .unwrap_or_default();
+    let now = chrono::Utc::now().to_rfc3339();
+
+    sqlx::query("UPDATE packs SET opened = 1, opened_cards = ?, opened_at = ? WHERE id = ?")
+        .bind(&card_ids_json)
+        .bind(&now)
         .bind(pack_id)
         .execute(pool)
         .await?;
@@ -152,7 +160,7 @@ pub async fn buy_pack(
 
 pub async fn get_unopened_packs(pool: &Pool, club_id: &str) -> AppResult<Vec<Pack>> {
     let packs = sqlx::query_as::<_, Pack>(
-        "SELECT id, club_id, definition_id, opened, created_at FROM packs WHERE club_id = ? AND opened = 0"
+        "SELECT id, club_id, definition_id, opened, created_at, opened_cards, opened_at FROM packs WHERE club_id = ? AND opened = 0"
     )
     .bind(club_id)
     .fetch_all(pool)