第一版提交，答题功能OK，题库管理待完善

.opencode/manifest.yaml

@@ -0,0 +1,14 @@
+specVersion: "0.1.0"
+info:
+  title: "问卷调查系统 (Survey System)"
+  description: "一个功能完善的在线考试/问卷调查平台，支持多种题型、随机抽题、免注册答题。"
+  version: "1.1.0"
+  license:
+    name: "Proprietary"
+references:
+  - path: "./100-business/domain.yaml"
+    type: "domain"
+  - path: "./200-api/api.yaml"
+    type: "api"
+  - path: "./300-database/schema.yaml"
+    type: "database"