feat: add menu.ui as module entry point with CRUD and UI/DSpy menu items

wwwroot/menu.ui

@@ -0,0 +1,22 @@
+[
+    {
+        "name": "contracts",
+        "label": "合同列表",
+        "url": "{{entire_url('contract_list.ui')}}"
+    },
+    {
+        "name": "new_contract",
+        "label": "新建合同",
+        "url": "{{entire_url('contract_edit.ui')}}"
+    },
+    {
+        "name": "contract_detail",
+        "label": "合同详情",
+        "url": "{{entire_url('contract_detail.ui')}}"
+    },
+    {
+        "name": "ai_config",
+        "label": "AI配置",
+        "url": "{{entire_url('ai_config.ui')}}"
+    }
+]