feat: Vike 骨架（pages feed+spa / renderer 双端入口 / AppShell 拆分 / serverClient）

vite.config 接入 vike 插件并改产出 dist/client+dist/server；feed 白名单 route 匹配 /、/board/:id、/post/:id(.html)；spa catch-all ssr:false；onRenderHtml renderToReadableStream 等 allReady 输出完整 HTML 并带主题/缩放脚本；onRenderClient 沿用样式表等待+冷启动预热+hydrate 回退；getHomeStoreState 作用域 + hydrating 变体入 RequestScope；删除 index.html 与 main.tsx

frontend/renderer/+onRenderClient.tsx

@@ -0,0 +1,90 @@
+import { StrictMode } from 'react';
+import type { ComponentType } from 'react';
+import { hydrateRoot, createRoot } from 'react-dom/client';
+import type { PageContextClient } from 'vike/types';
+import { applyTheme, getStoredTheme } from '../src/utils/theme';
+import { beginHomeHydrate } from '../src/utils/homeHydrate';
+import { reloadForStaleChunk } from '../src/utils/chunkLoad';
+import { consumeHomeBoot } from '../src/utils/homeBoot';
+import { ensureColdBootReady, isMainLayoutPath } from '../src/utils/prefetchRoute';
+
+export { onRenderClient };
+
+type PageComponent = ComponentType<{ url?: string }>;
+
+let root: ReturnType<typeof createRoot> | null = null;
+
+function waitForStylesheets(): Promise<void> {
+  const links = Array.from(document.querySelectorAll('link[rel="stylesheet"]'));
+  if (links.length === 0) return Promise.resolve();
+  return Promise.all(
+    links.map(
+      (node) =>
+        new Promise<void>((resolve) => {
+          const link = node as HTMLLinkElement;
+          try {
+            if (link.sheet) {
+              resolve();
+              return;
+            }
+          } catch {
+            /* cross-origin */
+          }
+          const finish = () => resolve();
+          link.addEventListener('load', finish, { once: true });
+          link.addEventListener('error', finish, { once: true });
+        }),
+    ),
+  ).then(() => undefined);
+}
+
+async function onRenderClient(pageContext: PageContextClient) {
+  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();
+  });
+
+  const el = document.getElementById('root');
+  if (!el) return;
+
+  await waitForStylesheets();
+  try {
+    if (document.fonts?.ready) await document.fonts.ready;
+  } catch {
+    /* ignore */
+  }
+
+  const path = `${window.location.pathname}${window.location.search}`;
+  if (isMainLayoutPath(window.location.pathname)) {
+    await ensureColdBootReady(path);
+  }
+
+  // 有 SSR 正文 → hydrate 接管同一 DOM（首帧 hydrate 同构变体）；SPA 壳 → 整树挂载
+  const hydrating = pageContext.isHydration && el.innerHTML.trim() !== '';
+  if (hydrating) beginHomeHydrate();
+
+  const Page = pageContext.Page as PageComponent;
+  const app = (
+    <StrictMode>
+      <Page />
+    </StrictMode>
+  );
+
+  if (hydrating) {
+    try {
+      hydrateRoot(el, app);
+    } catch (err) {
+      console.warn('[j13] hydrateRoot 失败，回退 createRoot', err);
+      el.innerHTML = '';
+      if (!root) root = createRoot(el);
+      root.render(app);
+    }
+  } else {
+    if (!root) root = createRoot(el);
+    root.render(app);
+  }
+}