refactor(app): 重构应用主题和页面结构

- 移除动态主题切换功能，改为全局统一深色主题
- 实现自定义TabBar组件替换原生tabBar，解决iOS闪白问题
- 创建main容器页面统一管理三个tab页面的生命周期和状态
- 将所有页面的onShow/onHide等生命周期方法迁移到子组件内部
- 更新页面路径从index改为main，并调整路由跳转逻辑
- 移除theme-mixin和相关主题工具函数
- 统一页面背景色设置，优化用户体验一致性

pages.json

@@ -1,17 +1,13 @@
 {
 	"pages": [
 		{
-			"path": "pages/index/index",
+			"path": "pages/main/main",
 			"style": {
 				"navigationStyle": "custom",
-				"navigationBarTitleText": ""
-			}
-		},
-		{
-			"path": "pages/profile/profile",
-			"style": {
-				"navigationStyle": "custom",
-				"navigationBarTitleText": ""
+				"navigationBarTitleText": "",
+				"backgroundColor": "#0B0B14",
+				"backgroundColorTop": "#0B0B14",
+				"backgroundColorBottom": "#0B0B14"
 			}
 		},
 		{
@@ -49,18 +45,6 @@
 				"navigationBarTitleText": ""
 			}
 		},
-		{
-			"path": "pages/circle/circle",
-			"style": {
-				"navigationStyle": "custom",
-				"navigationBarTitleText": "",
-				"app-plus": {
-					"background": "#0B0B14",
-					"bounceBackground": "#0B0B14",
-					"animationAlphaBGColor": "#0B0B14"
-				}
-			}
-		},
 		{
 			"path": "pages/circle-detail/circle-detail",
 			"style": {
@@ -139,31 +123,5 @@
 		"backgroundColorTop": "#0B0B14",
 		"backgroundColorBottom": "#0B0B14"
 	},
-	"tabBar": {
-		"color": "#9494AC",
-		"selectedColor": "#E8A838",
-		"backgroundColor": "#151520",
-		"borderStyle": "black",
-		"list": [
-			{
-				"pagePath": "pages/index/index",
-				"text": "首页",
-				"iconPath": "static/tab-home.png",
-				"selectedIconPath": "static/tab-home-active.png"
-			},
-			{
-				"pagePath": "pages/circle/circle",
-				"text": "酒友圈",
-				"iconPath": "static/tab-circle.png",
-				"selectedIconPath": "static/tab-circle-active.png"
-			},
-			{
-				"pagePath": "pages/profile/profile",
-				"text": "我的",
-				"iconPath": "static/tab-profile.png",
-				"selectedIconPath": "static/tab-profile-active.png"
-			}
-		]
-	},
 	"uniIdRouter": {}
 }