fix: Auth redirects and navigation for landing page routing

- login.html: Post-login redirect / -> /index.html; already-logged-in redirect / -> /index.html
- articles.html, topics.html: Auth failure redirect -> /login.html
- uni-nav.js: Dashboard link / -> /index.html; navigate function fix for prefix handling
- sw.js: Remove / pre-cache; HTML documents use Network First strategy for fresh content

Ultraworked with [Sisyphus](https://github.com/code-yeongyu/oh-my-openagent)

Co-authored-by: Sisyphus <clio-agent@sisyphuslabs.ai>

platform/frontend/sw.js

@@ -1,12 +1,8 @@
 // Service Worker for 宇之然内容创作平台
-const CACHE_NAME = 'yuzhiran-v2';
+const CACHE_NAME = 'yuzhiran-v3';
 const CACHE_URLS = [
-  '/',
   '/index.html',
   '/offline.html',
-  '/static/vue.global.prod.js',
-  '/static/element-plus.css',
-  '/static/element-plus.full.js',
   '/manifest.json'
 ];
 
@@ -17,7 +13,6 @@ self.addEventListener('install', (event) => {
     caches.open(CACHE_NAME).then((cache) => {
       console.log('[SW] Pre-caching core assets');
       return cache.addAll(CACHE_URLS.map(url => {
-        // 忽略同源请求404错误（静态资源可能不存在）
         return new Promise((resolve, reject) => {
           fetch(url).then(response => {
             if (response.ok) {
@@ -25,15 +20,10 @@ self.addEventListener('install', (event) => {
             } else {
               reject(new Error(`Failed to fetch ${url}: ${response.status}`));
             }
-          }).catch(() => {
-            // 静默失败，不阻止安装
-            resolve(url);
-          });
+          }).catch(() => { resolve(url); });
         });
       }));
-    }).catch(err => {
-      console.error('[SW] Install failed:', err);
-    })
+    }).catch(err => { console.error('[SW] Install failed:', err); })
   );
   self.skipWaiting();
 });
@@ -56,27 +46,44 @@ self.addEventListener('activate', (event) => {
   self.clients.claim();
 });
 
-// 网络请求拦截：Cache First + Network Fallback
+// 网络请求拦截
 self.addEventListener('fetch', (event) => {
   const { request } = event;
   const url = new URL(request.url);
 
   // 只处理同源请求
-  if (url.origin !== location.origin) {
-    return;
-  }
+  if (url.origin !== location.origin) { return; }
 
-  // API 请求：Network Only（不走缓存）
+  // API 请求：Network Only
   if (url.pathname.startsWith('/api/')) {
     event.respondWith(fetch(request));
     return;
   }
 
-  // 静态资源：Cache First
+  // HTML 文档：Network First（确保 landing page 始终加载最新版）
+  if (url.pathname === '/' || url.pathname.endsWith('.html')) {
+    event.respondWith(
+      fetch(request)
+        .then(response => {
+          if (response.ok) {
+            const clone = response.clone();
+            caches.open(CACHE_NAME).then(cache => cache.put(request, clone));
+          }
+          return response;
+        })
+        .catch(() => {
+          return caches.match(request).then(cached => {
+            return cached || caches.match('/offline.html');
+          });
+        })
+    );
+    return;
+  }
+
+  // 其他静态资源：Cache First
   event.respondWith(
     caches.match(request).then((cached) => {
       if (cached) {
-        // 返回缓存，并在后台更新
         fetch(request).then(response => {
           if (response.ok) {
             caches.open(CACHE_NAME).then(cache => cache.put(request, response));
@@ -84,17 +91,13 @@ self.addEventListener('fetch', (event) => {
         });
         return cached;
       }
-
-      // 无缓存，发起网络请求
       return fetch(request).then(response => {
-        // 成功且为有效响应，加入缓存
         if (response.ok && response.status === 200) {
-          const responseClone = response.clone();
-          caches.open(CACHE_NAME).then(cache => cache.put(request, responseClone));
+          const clone = response.clone();
+          caches.open(CACHE_NAME).then(cache => cache.put(request, clone));
         }
         return response;
       }).catch(() => {
-        // 网络失败，尝试返回离线页面（如果是文档请求）
         if (request.destination === 'document') {
           return caches.match('/offline.html');
         }
@@ -103,14 +106,11 @@ self.addEventListener('fetch', (event) => {
   );
 });
 
-// 后台同步（可选：在网络恢复后发送错误日志）
+// 后台同步
 self.addEventListener('sync', (event) => {
-  if (event.tag === 'sync-logs') {
-    event.waitUntil(syncLogs());
-  }
+  if (event.tag === 'sync-logs') { event.waitUntil(syncLogs()); }
 });
 
 async function syncLogs() {
-  // TODO: 实现日志同步
   console.log('[SW] Syncing logs...');
 }