Fix mall, shop, mall/shop refresh logic and battle pass flows

src/main/java/emu/nebula/server/handlers/HandlerBattlePassOrderReq.java

@@ -0,0 +1,47 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.Nebula;
+import emu.nebula.data.GameData;
+import emu.nebula.net.GameSession;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.BattlePassOrder.BattlePassOrderReq;
+import emu.nebula.proto.MallGemOrder.OrderInfo;
+
+@HandlerId(NetMsgId.battle_pass_order_req)
+public class HandlerBattlePassOrderReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = BattlePassOrderReq.parseFrom(message);
+        // Validate mode (1 = Premium, 2 = Luxury)
+        int requestedMode = req.getMode();
+        if (!session.getPlayer().isBattlePassUnlocked() || requestedMode < 1 || requestedMode > 2) {
+            return session.encodeMsg(NetMsgId.battle_pass_order_failed_ack);
+        }
+        
+        // Get battle pass
+        var battlePass = session.getPlayer().getBattlePassManager().getBattlePass();
+
+        // Allow: 0->1 (free to premium), 0->2 (free to luxury), 1->2 (premium to luxury)
+        int currentMode = battlePass.getMode();
+        if (requestedMode <= currentMode) {
+            return session.encodeMsg(NetMsgId.battle_pass_order_failed_ack);
+        }
+
+        var data = GameData.getBattlePassDataTable().get(battlePass.getBattlePassId());
+        if (data == null) {
+            return session.encodeMsg(NetMsgId.battle_pass_order_failed_ack);
+        }
+        
+        // Follow the same fake-payment lifecycle as mall orders:
+        // order ack -> paid notify -> order collect -> rewards popup.
+        return session.encodeMsg(
+                NetMsgId.battle_pass_order_succeed_ack,
+                Nebula.getGameContext().getPayModule().createBattlePassOrder(session, data, requestedMode)
+        );
+    }
+
+}