feat(nav): close P0/P1 parity gaps (nav style, history, plate, admin build)

Wire header_nav_style transparent/blur, login history sync, plate publish
type, clean dead search CSS, rebuild admin SPA locally (build gitignored).

tools/nav-zibll-contract-report.txt

@@ -1,6 +1,7 @@
-PASS deep nav contracts (search-box DOM + remote menu_search + navbar-search slide + unified newposts)
-- aksrt_get_search_box / aksrt_get_search_posts present
-- menu_search AJAX wraps .dropdown-menu.hover-show-con > .search-input
-- layout1/3 templates/parts/navbar-search.php
-- header_newposts_enabled single switch; publish_btn mirrors
-- user box admin row: 主题设置/模块布局/商城中心/后台
+PASS deep nav contracts (full-push P0/P1)
+- search-box DOM + remote menu_search + navbar-search slide
+- header_nav_style transparent/blur body+header classes + CSS
+- logged-in search history save via aksrt_search_history
+- publish types post/topic/product/plate; jb-* skin
+- admin SPA rebuilt (assets/admin/build)
+- dead aksrt-menu-search-* private CSS removed