Admin progression controls: quest limits/rotation, XP rates, level curve, manual XP adjustments

Co-Authored-By: Claude Sonnet 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01DjMbLQujBHunCCu5GpsHaT

panel/server/tests/features_v2.rs

@@ -37,6 +37,9 @@ async fn leveling_and_quests_progression() {
     let admin = t.login("admin", "supersecret").await;
     let (alex_token, _, alex_uuid, _) = setup_users(&t).await;
     let (_server_id, server_token) = create_test_server(&t, &admin).await;
+    // Hand every quest to every player so progress can be checked per quest.
+    let (s, v) = t.call("PUT", "/api/admin/progression", Some(&admin), Some(json!({"daily_quest_limit": 0, "weekly_quest_limit": 0}))).await;
+    assert_eq!(s, StatusCode::OK, "{v}");
 
     // 1. Initial level check
     let (s, lvl) = t.call("GET", "/api/v1/leveling/me", Some(&alex_token), None).await;