feat: 首页增加工具箱功能区、剧本评测可视化展示；重构剧本评分页面UI

- 首页新增工具箱功能区(ToolboxSection)，展示四大AI工具卡片
- 首页剧本功能区替换为六维柱状图可视化(ScriptReviewVisual)
- 剧本评分页面(ScriptTokensPage)全面重构为新版UI布局
- 左侧面板：上传区、AI识别信息、历史评测(持久化)、操作按钮
- 右侧：剧本输入区、评测结果Hero、六维柱状图、亮点/扣分点、优化建议表格
- 历史评测支持localStorage持久化，按时间倒序排列

src/styles/index.css

@@ -5,6 +5,8 @@
 @import "./components/legacy-components.css";
 @import "./pages/home.css";
 @import "./pages/welcome-splash.css";
+@import "./pages/toolbox.css";
+@import "./pages/script-review-visual.css";
 @import "./pages/workbench.css";
 @import "./pages/ecommerce.css";
 @import "./pages/ecommerce-video.css";
@@ -17,6 +19,7 @@
 @import "./pages/image-workbench.css";
 @import "./pages/subtitle-removal.css";
 @import "./pages/size-template.css";
+@import "./pages/script-tokens-v5.css";
 @import "./pages/script-tokens.css";
 @import "./pages/profile.css";
 @import "./pages/canvas.css";