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_unit2.json

@@ -0,0 +1,4 @@
+[
+  {"action": "snapshot", "max_elements": 300},
+  {"action": "eval_js", "js": "(() => { const nz = Array.from(document.querySelectorAll('nz-select')); const u = nz.find(e => (e.textContent||'').includes('单位性质') || (e.getAttribute('ng-reflect-name')||'').includes('Unit')); return '单位性质nz-select: ' + (u ? u.getAttribute('ng-reflect-name') : '未按名找到'); })()"}
+]