fix(router): 修复登录重定向兼容hash路由和普通路由的问题

添加对hash路由的识别处理，优先尝试使用hash路由跳转，失败时回退到普通pathname跳转
docs: 添加Flow架构与执行流程文档

frontend/src/utils/axios.ts

@@ -16,8 +16,19 @@ let pendingQueue: { resolve: () => void; reject: (e: unknown) => void; config: R
 
 function redirectToLogin(msg?: string): Promise<never> {
   clearToken()
-  if (typeof window !== 'undefined' && window.location.pathname !== '/login') {
-    window.location.href = '/login'
+  if (typeof window !== 'undefined') {
+    const isHashRouter = (window.location.hash || '').startsWith('#/')
+    if (isHashRouter) {
+      if (window.location.hash !== '#/login') {
+        window.location.hash = '#/login'
+      }
+    } else {
+      if (window.location.pathname !== '/login') {
+        // 兼容浏览器路由与生产静态部署：优先使用 hash 入口，无法识别时再回退 pathname
+        try { window.location.hash = '#/login' } catch {}
+        try { window.location.href = '/login' } catch {}
+      }
+    }
   }
   return Promise.reject(new Error(msg || '未登录或登录已过期'))
 }