chore: 更新应用版本至2.0.51并调整依赖配置

- 将应用版本从2.0.49提升至2.0.51
- 修改edu-core依赖为本地文件引用
- 更新多个页面的下拉刷新和底部加载逻辑
- 优化VIP权限描述，明确不包含论坛权益
- 调整部分页面样式以提升用户体验

pages.json

@@ -26,13 +26,7 @@
 			"path": "pages/mine/vip/index",
 			"style": {
 				"navigationBarTitleText": "VIP",
-				"enablePullDownRefresh": true,
-				"onReachBottomDistance": 100,
-				"app-plus": {
-					"bounce": "none",
-					"titleNView": false,
-					"popGesture": "none"
-				}
+				"enablePullDownRefresh": false
 			}
 		},
 		{
@@ -163,6 +157,7 @@
 			"style": {
 				"navigationBarTitleText": "我的订单",
 				"enablePullDownRefresh": false,
+				"onReachBottomDistance": 120,
 				"app-plus": {
 					"bounce": "none",
 					"titleNView": false,
@@ -391,7 +386,8 @@
 		{
 			"path": "pages/course/superVip",
 			"style": {
-				"navigationBarTitleText": "超V介绍"
+				"navigationBarTitleText": "超V介绍",
+				"enablePullDownRefresh": false
 			}
 		},
 		{
@@ -433,7 +429,8 @@
 		{
 			"path": "pages/course/outline",
 			"style": {
-				"navigationBarTitleText": "课程大纲"
+				"navigationBarTitleText": "课程大纲",
+				"enablePullDownRefresh": false
 			}
 		},
 		{