refactor(api): 移除未使用的配置接口及相关Hook

- 从cmsWebsiteField接口中删除configWebsiteField方法
- 删除useConfig自定义Hook及其引用
- 更新about页面，去除对config对象和useConfig的使用
- 修正invite模块请求URL，统一加上/api前缀

.workbuddy/expert-history.json

@@ -0,0 +1,17 @@
+{
+  "version": 2,
+  "sessions": {
+    "22fe5580026e4f249cf9bb33390baa6a": [
+      {
+        "expertId": "SeniorDeveloper",
+        "name": "Will",
+        "profession": "高级开发工程师",
+        "avatarUrl": "https://acc-1258344699.cos.accelerate.myqcloud.com/workbuddy/experts/avatars/02-Engineering/SeniorDeveloper/SeniorDeveloper.png",
+        "promptUrl": "https://acc-1258344699.cos.accelerate.myqcloud.com/workbuddy/experts/experts/02-Engineering/SeniorDeveloper/SeniorDeveloper_zh.md",
+        "usedAt": 1775908159660,
+        "industryId": "all"
+      }
+    ]
+  },
+  "lastUpdated": 1775908297489
+}