feat: 新增微信头像授权获取与个人中心展示功能

- 新增 `wechat-profile` 工具库，实现微信用户信息的本地存储、格式校验与授权获取逻辑
- 编写对应单元测试覆盖核心功能流程
- 重构个人中心成员组件，新增头像、昵称展示与授权触发按钮
- 更新个人中心页面，集成微信头像授权流程与状态管理

WonderQ-MiniAPP/tests/wechat-profile.test.ts

@@ -0,0 +1,51 @@
+import { beforeEach, describe, expect, it, vi } from "vitest";
+
+import {
+  getStoredWechatProfile,
+  requestWechatProfile,
+  saveWechatProfile,
+} from "@/lib/wechat-profile";
+
+describe("wechat profile", () => {
+  const storage = new Map<string, unknown>();
+  const getUserProfile = vi.fn();
+
+  beforeEach(() => {
+    storage.clear();
+    getUserProfile.mockReset();
+    vi.stubGlobal("uni", {
+      getStorageSync: (key: string) => storage.get(key),
+      setStorageSync: (key: string, value: unknown) => storage.set(key, value),
+      getUserProfile,
+    });
+  });
+
+  it("stores and restores a valid avatar profile", () => {
+    saveWechatProfile({ avatarUrl: "https://example.com/avatar.jpg", nickName: "Damon" });
+
+    expect(getStoredWechatProfile()).toEqual({
+      avatarUrl: "https://example.com/avatar.jpg",
+      nickName: "Damon",
+    });
+  });
+
+  it("requests the profile only through the explicit profile API", async () => {
+    getUserProfile.mockImplementation(({ success }: { success: (result: unknown) => void }) => {
+      success({ userInfo: { avatarUrl: "https://example.com/wechat.jpg", nickName: "旅行者" } });
+    });
+
+    await expect(requestWechatProfile()).resolves.toEqual({
+      avatarUrl: "https://example.com/wechat.jpg",
+      nickName: "旅行者",
+    });
+    expect(getUserProfile).toHaveBeenCalledWith(
+      expect.objectContaining({ provider: "weixin", lang: "zh_CN" }),
+    );
+  });
+
+  it("returns null when the user declines profile permission", async () => {
+    getUserProfile.mockImplementation(({ fail }: { fail: () => void }) => fail());
+
+    await expect(requestWechatProfile()).resolves.toBeNull();
+  });
+});