更新压缩机制，提高前缀缓存命中率，优化UI渲染机制，提高帧数

tests/web_page/steps/v_probe.json

@@ -0,0 +1,3 @@
+[
+  {"action": "eval_js", "js": "(() => { const els = Array.from(document.querySelectorAll('div,span')).filter(e => (e.textContent||'').trim() === '检索结果' && e.children.length <= 3); return JSON.stringify(els.map(e => { const a = {}; for (const x of e.attributes) a[x.name] = x.value.slice(0, 40); return {tag: e.tagName, cls: e.className, attrs: a, kids: e.children.length}; })); })()"}
+]