feat: Phase 1-3 全部完成 — 沙盒增强、学情分析、学习路径

backend/jest.config.json

@@ -0,0 +1,14 @@
+{
+  "moduleFileExtensions": ["js", "json", "ts"],
+  "rootDir": ".",
+  "testRegex": ".*\\.spec\\.ts$",
+  "transform": {
+    "^.+\\.(t|j)s$": "ts-jest"
+  },
+  "collectCoverageFrom": ["**/*.(t|j)s"],
+  "coverageDirectory": "../coverage",
+  "testEnvironment": "node",
+  "moduleNameMapper": {
+    "^@/(.*)$": "<rootDir>/src/$1"
+  }
+}