fix: 发版后软刷新检测入口壳并在 chunk 404 时硬刷新

避免 Logo/下拉刷新仍跑旧 index.js，以及站内消息预取失败弹出英文 toast。

Co-authored-by: Cursor <cursoragent@cursor.com>

embed_static/embed.go

@@ -40,8 +40,9 @@ func SetupEmbed(r *gin.Engine) error {
 	if sub, err := fs.Sub(staticFS, "static/spa/assets"); err == nil {
 		fileServer := http.StripPrefix("/assets", http.FileServer(http.FS(sub)))
 		r.GET("/assets/*filepath", func(c *gin.Context) {
-			// hashed 资源可长期缓存；发版后文件名变更，旧 URL 自然 404
-			c.Header("Cache-Control", "public, max-age=31536000, immutable")
+			// 仅 200 写 immutable，避免中间层把旧 chunk 的 404 长期缓存
+			w := &cacheOnOKWriter{ResponseWriter: c.Writer, cacheControl: "public, max-age=31536000, immutable"}
+			c.Writer = w
 			fileServer.ServeHTTP(c.Writer, c.Request)
 		})
 	}
@@ -57,6 +58,30 @@ func SetupEmbed(r *gin.Engine) error {
 	return nil
 }
 
+// cacheOnOKWriter 仅在最终状态码为 200 时写入长期 Cache-Control
+type cacheOnOKWriter struct {
+	gin.ResponseWriter
+	cacheControl string
+	wroteHeader  bool
+}
+
+func (w *cacheOnOKWriter) WriteHeader(code int) {
+	if !w.wroteHeader {
+		w.wroteHeader = true
+		if code == http.StatusOK {
+			w.Header().Set("Cache-Control", w.cacheControl)
+		}
+	}
+	w.ResponseWriter.WriteHeader(code)
+}
+
+func (w *cacheOnOKWriter) Write(b []byte) (int, error) {
+	if !w.wroteHeader {
+		w.WriteHeader(http.StatusOK)
+	}
+	return w.ResponseWriter.Write(b)
+}
+
 // ServeSPA 返回 React SPA 入口（仅注入站点默认标题）
 func ServeSPA(c *gin.Context) {
 	ServeSPAWithMeta(c, nil)

embed_static/spa_meta.go

@@ -43,8 +43,9 @@ func ServeSPAWithMeta(c *gin.Context, meta *SPAPageMeta) {
 		return
 	}
 	data = applySPAPageMeta(data, meta)
-	// 入口 HTML 禁止长期缓存，否则发版后仍引用旧 chunk 哈希
-	c.Header("Cache-Control", "no-cache")
+	// 入口 HTML 禁止缓存，否则发版后仍引用旧 chunk 哈希（部分反代对 no-cache 仍会存）
+	c.Header("Cache-Control", "no-cache, no-store, must-revalidate")
+	c.Header("Pragma", "no-cache")
 	c.Data(status, "text/html; charset=utf-8", data)
 }
 

frontend/src/main.tsx

@@ -4,11 +4,18 @@ import { applyTheme, getStoredTheme } from './utils/theme';
 import App from './App';
 import { consumeHomeBoot } from './utils/homeBoot';
 import { beginHomeHydrate } from './utils/homeHydrate';
+import { reloadForStaleChunk } from './utils/chunkLoad';
 import { ensureColdBootReady, isMainLayoutPath } from './utils/prefetchRoute';
 
 applyTheme(getStoredTheme());
 consumeHomeBoot();
 
+// Vite modulepreload / 动态 import 失败（发版后旧 hashed URL 404）
+window.addEventListener('vite:preloadError', (event) => {
+  event.preventDefault();
+  reloadForStaleChunk();
+});
+
 function hasSSRHome(): boolean {
   return !!document.querySelector('#root .ssr-home');
 }

frontend/src/utils/chunkLoad.ts

@@ -2,6 +2,22 @@
 const RELOAD_AT_KEY = 'j13:chunk-reload-at';
 const RELOAD_COOLDOWN_MS = 15_000;
 
+/** 从 HTML 中提取入口 module script（Vite 产物：/assets/index-*.js） */
+function extractEntryScriptSrc(html: string): string | null {
+  const re = /<script[^>]*\stype=["']module["'][^>]*\ssrc=["']([^"']+)["'][^>]*>/i;
+  const m = html.match(re);
+  if (m?.[1]) return m[1];
+  // src 在 type 之前
+  const re2 = /<script[^>]*\ssrc=["']([^"']+)["'][^>]*\stype=["']module["'][^>]*>/i;
+  return html.match(re2)?.[1] ?? null;
+}
+
+/** 当前文档已加载的入口 script src */
+export function getDocumentEntryScriptSrc(): string | null {
+  const el = document.querySelector<HTMLScriptElement>('script[type="module"][src]');
+  return el?.getAttribute('src') ?? null;
+}
+
 /** 判断是否为「发版后旧 JS chunk 失效」类错误 */
 export function isChunkLoadError(error: unknown): boolean {
   const msg = error instanceof Error
@@ -32,3 +48,29 @@ export function reloadForStaleChunk(): boolean {
   window.location.reload();
   return true;
 }
+
+/**
+ * 软刷新前对比入口 HTML 中的 index-*.js 哈希。
+ * 发版后当前页 chunk 仍在内存，裸 import() 不会重新拉文件，必须主动检测。
+ * @returns 是否已触发硬刷新（调用方应停止后续软刷新）
+ */
+export async function reloadIfShellStale(): Promise<boolean> {
+  const current = getDocumentEntryScriptSrc();
+  if (!current) return false;
+
+  try {
+    const res = await fetch(`${window.location.pathname}${window.location.search}`, {
+      cache: 'no-store',
+      headers: { Accept: 'text/html' },
+      credentials: 'same-origin',
+    });
+    if (!res.ok) return false;
+    const html = await res.text();
+    const next = extractEntryScriptSrc(html);
+    if (!next || next === current) return false;
+    return reloadForStaleChunk();
+  } catch {
+    // 网络失败：跳过，继续软刷新
+    return false;
+  }
+}

frontend/src/utils/prefetchRoute.ts

@@ -26,6 +26,7 @@ import {
   setCachedRecentUsers,
   setCachedTags,
 } from './layoutCache';
+import { isChunkLoadError, reloadForStaleChunk } from './chunkLoad';
 import { parsePermalinkID, parsePermalinkSlug } from './permalink';
 import { getSessionSnapshot, setSessionSnapshot } from './sessionPageCache';
 
@@ -57,28 +58,46 @@ function resolveUrl(to: To): URL {
 
 /** 预加载对应路由的 lazy chunk（与 App.tsx lazyWithRetry 对齐） */
 function preloadChunk(pathname: string): Promise<unknown> {
+  let load: Promise<unknown>;
   if (pathname === '/' || /^\/board\//.test(pathname)) {
-    return import('../pages/HomePage');
-  }
-  if (/^\/post\/[^/]+\/edit$/.test(pathname) || pathname === '/compose') {
-    return import('../pages/ComposePage');
-  }
-  if (/^\/post\//.test(pathname)) {
-    return import('../pages/PostDetailPage');
-  }
-  if (pathname === '/profile') return import('../pages/ProfilePage');
-  if (/^\/user\//.test(pathname)) return import('../pages/UserProfilePage');
-  if (pathname === '/favorites') return import('../pages/FavoritesPage');
-  if (pathname === '/projects') return import('../pages/ProjectsPage');
-  if (pathname === '/links') return import('../pages/LinksPage');
-  if (pathname === '/showcase') return import('../pages/ShowcasePage');
-  if (pathname === '/messages') return import('../pages/MessagesPage');
-  if (/^\/page\//.test(pathname)) return import('../pages/SitePageView');
-  if (pathname === '/login') return import('../pages/LoginPage');
-  if (pathname === '/register') return import('../pages/RegisterPage');
-  if (pathname === '/forgot-password') return import('../pages/ForgotPasswordPage');
+    load = import('../pages/HomePage');
+  } else if (/^\/post\/[^/]+\/edit$/.test(pathname) || pathname === '/compose') {
+    load = import('../pages/ComposePage');
+  } else if (/^\/post\//.test(pathname)) {
+    load = import('../pages/PostDetailPage');
+  } else if (pathname === '/profile') {
+    load = import('../pages/ProfilePage');
+  } else if (/^\/user\//.test(pathname)) {
+    load = import('../pages/UserProfilePage');
+  } else if (pathname === '/favorites') {
+    load = import('../pages/FavoritesPage');
+  } else if (pathname === '/projects') {
+    load = import('../pages/ProjectsPage');
+  } else if (pathname === '/links') {
+    load = import('../pages/LinksPage');
+  } else if (pathname === '/showcase') {
+    load = import('../pages/ShowcasePage');
+  } else if (pathname === '/messages') {
+    load = import('../pages/MessagesPage');
+  } else if (/^\/page\//.test(pathname)) {
+    load = import('../pages/SitePageView');
+  } else if (pathname === '/login') {
+    load = import('../pages/LoginPage');
+  } else if (pathname === '/register') {
+    load = import('../pages/RegisterPage');
+  } else if (pathname === '/forgot-password') {
+    load = import('../pages/ForgotPasswordPage');
+  } else {
     return Promise.resolve();
   }
+  // 发版后旧 hashed URL 404：硬刷新，挂起 Promise 避免落到 toast
+  return load.catch((err: unknown) => {
+    if (isChunkLoadError(err) && reloadForStaleChunk()) {
+      return new Promise(() => {});
+    }
+    throw err;
+  });
+}
 
 async function prefetchFeed(url: URL, force: boolean): Promise<void> {
   const limits = getCachedForumLimits();

frontend/src/utils/softRefresh.ts

@@ -1,3 +1,4 @@
+import { isChunkLoadError, reloadForStaleChunk, reloadIfShellStale } from './chunkLoad';
 import { prefetchLayoutShell, prefetchRoute } from './prefetchRoute';
 import { doneTransition, startTransition } from './spaTransition';
 
@@ -10,20 +11,28 @@ export type SoftRefreshOpts = {
 };
 
 /**
- * 软刷新当前页：预热齐套后派发一次 commit。
+ * 软刷新当前页：先检测入口壳是否过期，再预热齐套后派发一次 commit。
  * `progress: true` 时走顶栏进度条。
  */
 export async function softRefreshCurrentPage(to?: string, opts?: SoftRefreshOpts): Promise<void> {
   const path = to ?? `${window.location.pathname}${window.location.search}`;
   const id = opts?.progress ? startTransition() : undefined;
   try {
+    // 发版后旧壳仍在内存：先对比入口 script，过期则硬刷新
+    if (await reloadIfShellStale()) {
+      return;
+    }
     await Promise.all([
       prefetchRoute(path, { force: true }),
       prefetchLayoutShell({ force: true }),
     ]);
-  } catch {
-    // 仍派发 commit，让界面有机会用已有缓存自愈
+  } catch (e: unknown) {
+    if (isChunkLoadError(e) && reloadForStaleChunk()) {
+      return;
     }
-  window.dispatchEvent(new Event(PAGE_SOFT_REFRESH_COMMIT_EVENT));
+    // 其它错误仍派发 commit，让界面有机会用已有缓存自愈
+  } finally {
     if (id != null) doneTransition(id);
   }
+  window.dispatchEvent(new Event(PAGE_SOFT_REFRESH_COMMIT_EVENT));
+}

frontend/src/utils/spaTransition.ts

@@ -1,5 +1,6 @@
 import type { NavigateFunction, NavigateOptions, To } from 'react-router-dom';
 import { notify } from '@/lib/notify';
+import { isChunkLoadError, reloadForStaleChunk } from './chunkLoad';
 import { prefetchRoute } from './prefetchRoute';
 
 type Listener = (active: boolean) => void;
@@ -100,6 +101,8 @@ export async function transitionTo(
     nav(target, navOpts);
   } catch (e: unknown) {
     if (!silent && mySeq !== seq) return;
+    // 发版后 chunk 404：整页刷新，不 toast 英文原错
+    if (isChunkLoadError(e) && reloadForStaleChunk()) return;
     notify.error(e instanceof Error ? e.message : '加载失败');
   } finally {
     if (id != null) {