feat: 项目品牌改为黄果漫剧后台管理系统

- 页面标题、登录、首页、header 文案统一改为「黄果漫剧后台管理系统」
- 站点 favicon 与 header logo 替换为新的 icon.webp
- 升级 node-sass 到 ^7.0.3,sass-loader 到 ^10.0.5

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

package.json

@@ -45,9 +45,9 @@
     "compression-webpack-plugin": "^3.1.0",
     "eslint": "^5.16.0",
     "eslint-plugin-vue": "^5.0.0",
-    "node-sass": "^4.9.0",
+    "node-sass": "^7.0.3",
     "qs": "^6.9.0",
-    "sass-loader": "^7.1.0",
+    "sass-loader": "^10.0.5",
     "vue-cropper": "^0.4.9",
     "vue-template-compiler": "^2.6.10"
   },