部分重型模块的原子化拆解

static/modules/auth.js

@@ -0,0 +1,49 @@
+// modules/auth.js
+import { apiFetch } from './api.js';
+
+export function parseJwtExpire(token) {
+    try {
+        const payload = JSON.parse(atob(token.split('.')[1]));
+        return payload.exp * 1000;
+    } catch {
+        return Date.now() + 7 * 24 * 60 * 60 * 1000;
+    }
+}
+
+export function saveAuthState(token, username) {
+    const expire = parseJwtExpire(token);
+    localStorage.setItem('frpc_token', token);
+    localStorage.setItem('frpc_token_expire', String(expire));
+    localStorage.setItem('frpc_username', username);
+    return expire;
+}
+
+export function loadAuthState() {
+    const token = localStorage.getItem('frpc_token');
+    const expire = parseInt(localStorage.getItem('frpc_token_expire') || '0', 10);
+    const username = localStorage.getItem('frpc_username') || '';
+    if (token && expire > Date.now()) {
+        return { token, expire, username, valid: true };
+    }
+    clearAuthState();
+    return { token: '', expire: 0, username: '', valid: false };
+}
+
+export function clearAuthState() {
+    localStorage.removeItem('frpc_token');
+    localStorage.removeItem('frpc_token_expire');
+    localStorage.removeItem('frpc_username');
+}
+
+export async function login(username, password) {
+    const data = await apiFetch('/login', {
+        method: 'POST',
+        body: JSON.stringify({ username, password }),
+    });
+    if (data.code === 0) {
+        const token = data.data.token;
+        const expire = saveAuthState(token, username);
+        return { success: true, token, expire };
+    }
+    return { success: false, error: data.msg || '登录失败' };
+}