From 9abd571f43b8bacb33b18020c9b573740d172967 Mon Sep 17 00:00:00 2001
From: lanterngamescn <lanterngamescn@gmail.com>
Date: Thu, 25 Jun 2026 23:49:47 +0800
Subject: [PATCH] =?UTF-8?q?M5:=20=E6=98=BE=E5=BC=8F=E5=8C=96=E5=AF=BC?=
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确认当前实现已符合用户拓扑：大厅常驻不销毁、子游戏临时销毁、仅 大厅↔子游戏、
子游戏换子游戏须 backgameData 回大厅再 SwitchOverGameData 进新子游戏。

- switchGame 守卫拆分：已在子游戏中(subgameUrl!='')时忽略 SwitchOverGameData 并告警日志
  （此前静默忽略）；注释说明拓扑约束与正确流程。无功能变更，仅可观测性。
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
---
 entry/src/main/ets/pages/BridgeGameContainer.ets | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/entry/src/main/ets/pages/BridgeGameContainer.ets b/entry/src/main/ets/pages/BridgeGameContainer.ets
index 87a637d..d59bdbc 100644
--- a/entry/src/main/ets/pages/BridgeGameContainer.ets
+++ b/entry/src/main/ets/pages/BridgeGameContainer.ets
@@ -114,7 +114,13 @@ export struct BridgeGameContainer {
 
   /** 路径 A：大厅 → 子游戏（大厅去激活并保活，创建子游戏 Web）。 */
   private switchGame(p?: EventPayload): void {
-    if (p === undefined || this.subgameUrl !== '') {
+    if (p === undefined) {
+      return;
+    }
+    // 拓扑约束：仅 大厅↔子游戏，无 子游戏→子游戏。已在子游戏中时忽略——
+    // 游戏逻辑须先 backgameData 回大厅、再由大厅发 SwitchOverGameData 进新子游戏。
+    if (this.subgameUrl !== '') {
+      Logger.tag('BridgeGameContainer').w('SwitchOverGameData ignored: already in subgame (route via lobby)');
       return;
     }
     const d = p as SwitchGamePayload;