feat: 首页 Go SSR 与 React hydrate 同构，消壳层与帖行闪动

补齐侧栏/右栏图标与徽章、鉴权种子、StaticFeedList，并修正嵌套 a 与标题徽章对齐。

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

frontend/vite.config.ts

@@ -1,13 +1,40 @@
 import path from 'path';
-import { defineConfig } from 'vite';
+import { defineConfig, type Plugin } from 'vite';
 import react from '@vitejs/plugin-react';
 
 // 与 Go 后端默认端口一致，可通过 VITE_API_PORT 覆盖
 const apiPort = process.env.VITE_API_PORT || '3000';
 const apiTarget = `http://localhost:${apiPort}`;
 
+/** 把 stylesheet 挪到 head 靠前（先于 module script），接近 Gitea 外链 CSS 顺序 */
+function htmlStylesheetsFirst(): Plugin {
+  return {
+    name: 'html-stylesheets-first',
+    enforce: 'post',
+    transformIndexHtml(html) {
+      // 只处理真实标签，忽略注释里的示例文字
+      const linkRe = /<link\b(?![^>]*\/?>)[^>]*\brel=["']stylesheet["'][^>]*>\s*/gi;
+      // 更稳妥：逐个找 link 标签
+      const styles: string[] = [];
+      const out = html.replace(/<link\b[^>]*>/gi, (tag) => {
+        if (/\brel=["']stylesheet["']/i.test(tag)) {
+          styles.push(tag);
+          return '';
+        }
+        return tag;
+      });
+      if (!styles.length) return html;
+      const inject = `${styles.join('\n    ')}\n    `;
+      if (/<script\b/i.test(out)) {
+        return out.replace(/<script\b/i, `${inject}<script`);
+      }
+      return out.replace(/<\/head>/i, `    ${inject}</head>`);
+    },
+  };
+}
+
 export default defineConfig({
-  plugins: [react()],
+  plugins: [react(), htmlStylesheetsFirst()],
   resolve: {
     alias: {
       '@': path.resolve(__dirname, './src'),