feat(student-portal): 完整实现 student-portal 微前端

包含 src 全部实现、Dockerfile、配置文件、contracts 包等

packages/contracts/package.json

@@ -0,0 +1,15 @@
+{
+  "name": "@edu/contracts",
+  "version": "0.1.0",
+  "private": true,
+  "description": "共享契约：Permissions 常量 + 类型（coord 维护，当前为最小 stub）",
+  "main": "src/index.ts",
+  "types": "src/index.ts",
+  "scripts": {
+    "lint": "eslint src",
+    "typecheck": "tsc --noEmit"
+  },
+  "devDependencies": {
+    "typescript": "^5.6.0"
+  }
+}