polish(ui): full-system layout audit, header titles for all routes, dialog title truncation

- headless DOM audit (Edge dump, 1440/390 x 10 routes): no real horizontal page overflow on any screen size; timeline bleed & drawer offsets are intentional and verified benign
- header now labels profile/resume/assessment/admin routes (was blank h1 on those pages)
- dialog header truncates long titles instead of pushing controls out
- page containers audited for consistent rhythm (1080/1280/880 widths share identical paddings)
- www rebuilt, temp instrumentation removed

app/src/components/layout/Header.tsx

@@ -9,7 +9,11 @@ const TITLES: Record<string, { title: string; sub?: string }> = {
   '/grades': { title: '成绩', sub: '学年学科成绩 · 梯度与总览' },
   '/dashboard': { title: '统计', sub: '量化个人成长收获' },
   '/types': { title: '记录类型', sub: '类型与字段模板管理' },
-  '/taxonomy': { title: '字典与维度', sub: '级别、角色与成长维度' }
+  '/taxonomy': { title: '字典与维度', sub: '级别、角色与成长维度' },
+  '/profile': { title: '个人信息', sub: '学籍与联系方式维护' },
+  '/resume': { title: '我的简历', sub: '模板配置 · Word 导出' },
+  '/assessment': { title: '综合测评', sub: '学年素质测评与材料导出' },
+  '/admin': { title: '管理', sub: '用户与邀请码 · 数据维护' },
 };
 
 export function Header({ onMenu }: { onMenu?: () => void }) {