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).

assets/admin/src/schema/sections/page-display/index.js

@@ -138,11 +138,13 @@ export const pageDisplaySchemas = {
             { label: '文章', value: 'post' },
             { label: '帖子', value: 'topic' },
             { label: '商品', value: 'product' },
+            { label: '版块', value: 'plate' },
           ], dependsOn: { key: 'header_newposts_enabled', value: true }, help: '未开启的模块不会显示' },
           { key: 'header_user_newposts_btn', label: '用户卡发布类型', type: 'select', default: 'post', options: [
             { label: '文章', value: 'post' },
             { label: '帖子', value: 'topic' },
             { label: '商品', value: 'product' },
+            { label: '版块', value: 'plate' },
           ] },
           { key: 'header_user_newposts_text', label: '用户卡发布文案', type: 'input', default: '发布内容' },
           { key: 'header_nav_pay_vip', label: '导航栏开通会员按钮', type: 'switch', default: true, help: '顶部导航显示开通会员' },