fix: 修复旧版前端登录跳转

docs/project_context.md

@@ -1,5 +1,12 @@
 # 项目上下文记录
 
+## 2026-05-15：修复旧版前端未登录闪烁
+
+- `frontend_old/js/app.js` 现在会在首页初始化前检查登录 token；未登录时直接跳到旧版登录页，避免首页继续初始化并反复请求 API 造成未授权提示闪烁。
+- 旧版前端鉴权统一兼容 `capacity_report_token` 和旧 key `token`：请求优先读取新版 key，登录页会同时写入两个 key，并继续写入 `token` cookie。
+- 旧版 API 401、XHR 上传 401 和退出登录都会清理两个本地 token key 及 cookie，并跳转到 `/login.html`；通过 `/old/...` 路径访问旧版时会跳转到 `/old/login.html`。
+- 已用 headless Chrome 验证：清空本地存储后访问 `http://127.0.0.1:9082/` 会进入 `http://127.0.0.1:9082/login.html`；按本机 `auth.ini` 登录后回到旧版首页，`/api/cache/size` 携带 token 调用返回 200。
+
 ## 2026-05-15：新版上传页对齐旧版布局并恢复拖拽上传
 
 - `frontend/src/components/FileWorkflow.vue` 的上传页内容区已按旧版 `frontend_old/index.html` 的上传结构重排，保留新版侧边导航和顶部标题栏，只对齐页面主体中的上传区、文件列表、上传进度和处理日志布局。

frontend_old/js/app.js

@@ -5,6 +5,38 @@
 
 // ==================== 工具函数 ====================
 
+const LEGACY_TOKEN_KEY = 'token';
+const APP_TOKEN_KEY = 'capacity_report_token';
+
+function getLegacyLoginPath() {
+    const path = window.location.pathname;
+    return path === '/old' || path.startsWith('/old/') ? '/old/login.html' : '/login.html';
+}
+
+function getAuthToken() {
+    return localStorage.getItem(APP_TOKEN_KEY) || localStorage.getItem(LEGACY_TOKEN_KEY) || '';
+}
+
+function clearAuthToken() {
+    localStorage.removeItem(APP_TOKEN_KEY);
+    localStorage.removeItem(LEGACY_TOKEN_KEY);
+    document.cookie = 'token=; path=/; max-age=0';
+}
+
+function redirectToLogin() {
+    const loginPath = getLegacyLoginPath();
+    if (window.location.pathname !== loginPath) {
+        window.location.replace(loginPath);
+    }
+}
+
+function requireAuthToken() {
+    if (getAuthToken()) return true;
+    clearAuthToken();
+    redirectToLogin();
+    return false;
+}
+
 function $(selector) {
     return document.querySelector(selector);
 }
@@ -114,7 +146,7 @@ async function api(endpoint, options = {}) {
     // 如果没有指定 method 且没有 body，默认使用 GET
     const method = options.method || (options.body ? 'POST' : 'GET');
     
-    const token = localStorage.getItem('token');
+    const token = getAuthToken();
     
     const fetchOptions = {
         method: method,
@@ -134,7 +166,7 @@ async function api(endpoint, options = {}) {
     const response = await fetch(`/api${endpoint}`, fetchOptions);
     
     if (response.status === 401 && endpoint !== '/login') {
-        localStorage.removeItem('token');
+        clearAuthToken();
         showLoginModal();
         throw new Error('未授权或登录已过期，请重新登录');
     }
@@ -148,15 +180,13 @@ async function api(endpoint, options = {}) {
 }
 
 function showLoginModal() {
-    localStorage.removeItem('token');
-    document.cookie = 'token=; path=/; max-age=0';
-    window.location.href = '/';
+    clearAuthToken();
+    redirectToLogin();
 }
 
 function logout() {
-    localStorage.removeItem('token');
-    document.cookie = 'token=; path=/; max-age=0';
-    window.location.href = '/';
+    clearAuthToken();
+    window.location.href = getLegacyLoginPath();
 }
 
 
@@ -651,7 +681,7 @@ class FileUploader {
                             resolve({ success: true });
                         }
                     } else if (xhr.status === 401) {
-                        localStorage.removeItem('token');
+                        clearAuthToken();
                         showLoginModal();
                         reject(new Error('未授权或登录已过期，请重新登录'));
                     } else {
@@ -666,7 +696,7 @@ class FileUploader {
                 
                 // 开始上传
                 xhr.open('POST', '/api/upload');
-                const token = localStorage.getItem('token');
+                const token = getAuthToken();
                 if (token) {
                     xhr.setRequestHeader('Authorization', `Bearer ${token}`);
                 }
@@ -2208,6 +2238,9 @@ async function updateCacheSize() {
 }
 
 document.addEventListener('DOMContentLoaded', () => {
+    if (!requireAuthToken()) {
+        return;
+    }
     initApp();
 });
 

frontend_old/login.html

@@ -161,6 +161,21 @@
     <div class="toast" id="toast"></div>
 
     <script>
+        const LEGACY_TOKEN_KEY = 'token';
+        const APP_TOKEN_KEY = 'capacity_report_token';
+
+        function getLegacyHomePath() {
+            const path = window.location.pathname;
+            return path === '/old/login.html' || path.startsWith('/old/') ? '/old' : '/';
+        }
+
+        function setAuthToken(token) {
+            if (!token) return;
+            localStorage.setItem(APP_TOKEN_KEY, token);
+            localStorage.setItem(LEGACY_TOKEN_KEY, token);
+            document.cookie = `token=${encodeURIComponent(token)}; path=/; max-age=${86400 * 30}; SameSite=Lax`;
+        }
+
         function showToast(msg, type) {
             const t = document.getElementById('toast');
             t.textContent = msg;
@@ -197,11 +212,9 @@
 
                 const data = await res.json();
                 if (data.success && data.token) {
-                    localStorage.setItem('token', data.token);
-                    // 设置 cookie 供后端 / 路由判断
-                    document.cookie = `token=${data.token}; path=/; max-age=${86400 * 30}; SameSite=Lax`;
+                    setAuthToken(data.token);
                     showToast('登录成功', 'success');
-                    setTimeout(() => { window.location.href = '/'; }, 300);
+                    setTimeout(() => { window.location.href = getLegacyHomePath(); }, 300);
                 }
             } catch (err) {
                 showToast(err.message, 'error');