feat(mainPage): pin more to last position and fix drag-scroll conflict

- Add ensureMoreLast() to gridOrder store, guaranteeing grid-13 alwaysstays at the end after reorder, restore from storage, or layout change
- Set disabledDrag: true on更多 item to prevent it from being dragged
- Add disabledDrag field to MainPageGridDataType
- Lock ScrollView during drag (isDragging state) to resolve conflictbetween DraggableGrid and ScrollView gesture handlers
- Add 校灵通 (eventGlide) entry with WeChat mini-program deeplink

Author: bingling-sama

src/assets/data/updateInfo.json

@@ -4,7 +4,8 @@
 	"newFeatures": [
     "支持切换校历年份",
     "新增课表背景高斯模糊效果",
-    "重构样式设置页面"
+    "重构样式设置页面",
+		"新增首页校灵通入口"
   ],
   "fixedIssues": [
     "修复电费查询功能",