refactor: overhaul UI for streamlined user experience

Redesign navigation, home overview, user portrait, and valuation pages
with improved functionality and responsive design.

Co-authored-by: null <4804959+fnvtk@users.noreply.github.com>

lib/api-utils.ts

@@ -0,0 +1,47 @@
+/**
+ * 带有重试机制的API请求函数
+ * @param url 请求URL
+ * @param options 请求选项
+ * @param retries 重试次数
+ * @param retryDelay 重试延迟(ms)
+ * @returns Promise<Response>
+ */
+export async function fetchWithRetry(
+  url: string,
+  options: RequestInit = {},
+  retries = 3,
+  retryDelay = 1000,
+): Promise<Response> {
+  try {
+    const response = await fetch(url, options)
+
+    if (!response.ok && retries > 0) {
+      console.log(`请求失败，${retryDelay}ms后重试，剩余重试次数: ${retries - 1}`)
+      await new Promise((resolve) => setTimeout(resolve, retryDelay))
+      return fetchWithRetry(url, options, retries - 1, retryDelay * 2)
+    }
+
+    return response
+  } catch (error) {
+    if (retries > 0) {
+      console.log(`请求出错，${retryDelay}ms后重试，剩余重试次数: ${retries - 1}`)
+      await new Promise((resolve) => setTimeout(resolve, retryDelay))
+      return fetchWithRetry(url, options, retries - 1, retryDelay * 2)
+    }
+    throw error
+  }
+}
+
+/**
+ * 处理API响应的通用函数
+ * @param response 响应对象
+ * @returns Promise<T>
+ */
+export async function handleApiResponse<T>(response: Response): Promise<T> {
+  if (!response.ok) {
+    const errorData = await response.json().catch(() => ({}))
+    throw new Error(errorData.message || `请求失败: ${response.status}`)
+  }
+
+  return response.json()
+}