fix(campaign): 修复"美梦巡演：奇妙夜"活动sp关卡卡在进入关卡界面的问题 (#397)

最新活动"美梦巡演：奇妙夜"sp关卡配置 `AzurPilot/campaign/event_20260625_cn/sp.py`
中`MAP_HAS_MODE_SWITCH`被错误设置为`True`，导致进入关卡时AzurPilot会寻找不存在的切换困难模式按钮，从而卡死在进入关卡界面。对照此前活动的
`sp.py` 文件将其设置为`True`

## Summary by Sourcery

Bug Fixes:
- 修正 20260625 CN SP 活动配置中的 `MAP_HAS_MODE_SWITCH` 标志，以防止客户端在进入 SP
关卡时发生卡死。

<details>
<summary>Original summary in English</summary>

## Summary by Sourcery

Bug Fixes:
- Correct the MAP_HAS_MODE_SWITCH flag in the 20260625 CN SP campaign
config so the client no longer hangs when entering the SP stage.

</details>

Author: wess09

campaign/event_20260625_cn/sp.py

@@ -66,7 +66,7 @@ class Config:
     MAP_HAS_MYSTERY = False
     MAP_CHAPTER_SWITCH_20260326 = True
     STAGE_ENTRANCE = ['half', '20240725']
-    MAP_HAS_MODE_SWITCH = True
+    MAP_HAS_MODE_SWITCH = False
     STAGE_INCREASE_AB = True
     MAP_WALK_USE_CURRENT_FLEET = True
     STAR_REQUIRE_1 = 0