支持项目编码访问单项目公示屏

需求：无需查询公示 Token，直接通过项目编码打开单项目公示页。

实现：规范化项目编码并按 code 查询，同时保留既有 Token 哈希查询；补充前后端及集成回归测试。

web/src/api.test.ts

@@ -120,6 +120,20 @@ describe("public display overview", () => {
 
     expect(fetchMock.mock.calls[0][0]).toBe("/api/display/overview");
   });
+
+  it("loads one project display using its project code", async () => {
+    const fetchMock = vi.fn().mockResolvedValue(jsonResponse({
+      project_name: "峡谷漂流",
+      status: "RUNNING",
+      current_batch: null,
+      recent_batches: [],
+    }));
+    vi.stubGlobal("fetch", fetchMock);
+
+    await api.display("RAFT");
+
+    expect(fetchMock.mock.calls[0][0]).toBe("/api/display/RAFT/snapshot");
+  });
 });
 
 describe("isolated portal authentication", () => {