feat(web): I3 contract list, wizard, and detail

Add routes and menu, platform API helpers (patch status, audit-events),
and Vue views aligned to platform contract DTOs and state transitions.

Made-with: Cursor

web/delivery-platform-ui/src/router/index.js

@@ -26,6 +26,24 @@ const routes = [
         component: () => import("../views/ProjectsView.vue"),
         meta: { roles: ["SYS_ADMIN", "DEVELOPER"] },
       },
+      {
+        path: "contracts/new",
+        name: "contract-new",
+        component: () => import("../views/ContractWizardView.vue"),
+        meta: { roles: ["SYS_ADMIN", "DEVELOPER"], title: "新建合同" },
+      },
+      {
+        path: "contracts/:id",
+        name: "contract-detail",
+        component: () => import("../views/ContractDetailView.vue"),
+        meta: { roles: ["SYS_ADMIN", "DEVELOPER"], title: "合同详情" },
+      },
+      {
+        path: "contracts",
+        name: "contracts",
+        component: () => import("../views/ContractsView.vue"),
+        meta: { roles: ["SYS_ADMIN", "DEVELOPER"], title: "合同管理" },
+      },
     ],
   },
   { path: "/403", name: "forbidden", component: () => import("../views/ForbiddenView.vue") },