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/scripts/extract-lucide-paths.mjs

@@ -0,0 +1,60 @@
+import fs from 'fs';
+import path from 'path';
+
+const iconsDir = path.join('node_modules/lucide-react/dist/esm/icons');
+const names = [
+  'search', 'house', 'star', 'folder-git-2', 'link-2', 'earth', 'file-text',
+  'message-circle', 'tags', 'moon', 'clock', 'badge-check', 'sliders-horizontal',
+  'plus', 'sun', 'mail', 'calendar-check', 'check', 'gift', 'panel-right',
+  'user-plus', 'layout-dashboard',
+  'code-2', 'coffee', 'help-circle', 'message-square', 'lightbulb', 'book-open',
+  'gamepad-2', 'palette', 'music', 'camera', 'heart', 'zap', 'globe', 'users',
+  'briefcase', 'graduation-cap', 'shopping-bag', 'map-pin', 'megaphone', 'flame',
+  'folder', 'wrench', 'cpu',
+];
+
+function esc(v) {
+  return String(v).replace(/\\/g, '\\\\').replace(/"/g, '\\"');
+}
+
+function nodeToInner(nodes) {
+  return nodes.map(([tag, attrs]) => {
+    let s = `<${tag}`;
+    for (const [k, v] of Object.entries(attrs)) {
+      if (k === 'key') continue;
+      s += ` ${k}="${esc(v)}"`;
+    }
+    return `${s}/>`;
+  }).join('');
+}
+
+function resolveIconFile(name) {
+  let f = path.join(iconsDir, `${name}.mjs`);
+  let src = fs.readFileSync(f, 'utf8');
+  const re = src.match(/export \{ default \} from '\.\/([^']+)';/);
+  if (re) {
+    f = path.join(iconsDir, re[1]);
+    src = fs.readFileSync(f, 'utf8');
+  }
+  return { f, src };
+}
+
+const out = {};
+for (const n of names) {
+  try {
+    const { src } = resolveIconFile(n);
+    const m = src.match(/const __iconNode = (\[[\s\S]*?\]);/);
+    if (!m) {
+      console.error('no node', n);
+      continue;
+    }
+    // eslint-disable-next-line no-eval
+    const nodes = eval(m[1]);
+    out[n] = nodeToInner(nodes);
+  } catch (e) {
+    console.error('fail', n, e.message);
+  }
+}
+
+fs.writeFileSync('tmp-lucide-paths.json', JSON.stringify(out, null, 2));
+console.log('wrote', Object.keys(out).length, 'icons');