38e5d63273
- Add KPI overview section (项目总览) with project count, account total, and latest project cards - Add toolbar with search input and refresh button above the project table - Extract 'new project' button into the overview heading for better hierarchy - Add admin-overview, admin-kpi-grid, admin-kpi-card, admin-table-section, admin-toolbar CSS classes - Extend Project type with optional user_count field - Convert it.fails placeholder to passing overview test - Fix modal test to use role-based selector (avoids duplicate text in KPI card + table) Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>