feat: 重构页面、路由与业务组件，新增课程演示

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/pages/CourseDemo/CourseDemo.spotlight.tsx

@@ -0,0 +1,30 @@
+import { defineSpotlight } from "@/components/common";
+
+export const courseDemoSpotlight = defineSpotlight({
+	id: "resource-map",
+	showOnce: false,
+	steps: [
+		{
+			id: "course-resources",
+			title: "先阅读资源卡片",
+			description: "每张卡片都包含用途说明。按住卡片，将它拖向右侧的正确分类。",
+			placement: "right",
+		},
+		{
+			id: "course-categories",
+			title: "放入对应学习阶段",
+			description:
+				"政策材料用于理解知识，互动资源用于练习，答疑与咨询属于学习支持。",
+			placement: "top",
+			padding: 12,
+		},
+		{
+			id: "course-progress",
+			title: "自动记录学习进度",
+			description:
+				"每次正确分类都会保存；刷新页面后仍可继续，完成时会展示本节学习结果。",
+			placement: "left",
+			doneLabel: "开始分类",
+		},
+	],
+});