feat(ui): 更新应用图标和启动屏幕为新品牌标识并调整相关配置

更新应用图标、启动屏幕和相关配置以匹配新品牌标识，移除旧的 Sealife 图标文件并替换为新的 icon.icon 资源。同时更新 iOS 配置中的背景任务标识符以符合命名规范。调整统计页面头部 logo 尺寸和字体粗细以优化视觉效果。

- 替换所有平台的应用图标和启动图资源
- 更新 app.json、Info.plist 和各 imageset 配置文件
- 调整 statistics.tsx 中的 logo 样式
- 移除已废弃的腾讯云 COS 文档

app.json

@@ -4,7 +4,6 @@
     "slug": "digital-pilates",
     "version": "1.0.5",
     "orientation": "portrait",
-    "icon": "./assets/images/Sealife.jpeg",
     "scheme": "digitalpilates",
     "userInterfaceStyle": "light",
     "newArchEnabled": true,
@@ -25,33 +24,15 @@
           "fetch",
           "remote-notification"
         ]
-      }
-    },
-    "android": {
-      "adaptiveIcon": {
-        "foregroundImage": "./assets/images/Sealife.jpeg",
-        "backgroundColor": "#ffffff"
       },
-      "edgeToEdgeEnabled": true,
-      "package": "com.anonymous.digitalpilates",
-      "permissions": [
-        "android.permission.RECEIVE_BOOT_COMPLETED",
-        "android.permission.VIBRATE",
-        "android.permission.WAKE_LOCK",
-        "android.permission.RECORD_AUDIO"
-      ]
-    },
-    "web": {
-      "bundler": "metro",
-      "output": "static",
-      "favicon": "./assets/images/Sealife.jpeg"
+      "icon": "./assets/icon.icon"
     },
     "plugins": [
       "expo-router",
       [
         "expo-splash-screen",
         {
-          "image": "./assets/images/Sealife.jpeg",
+          "image": "./assets/icon.icon",
           "imageWidth": 40,
           "resizeMode": "contain",
           "backgroundColor": "#ffffff"
@@ -68,7 +49,7 @@
       [
         "expo-notifications",
         {
-          "icon": "./assets/images/Sealife.jpeg",
+          "icon": "./assets/icon.icon",
           "color": "#ffffff"
         }
       ],