新增订单收票付款交货跟进并完善使用升级手册

增加部分付款和部分交货状态、工作台筛选、权限校验、跟进记录及 v4 数据迁移；补充 Windows EXE 构建与验收脚本。附 16 页 PDF 使用升级手册及企业微信详细配置说明、生成脚本和测试截图。验证：76 项回归测试、EXE 浏览器验收与 PDF 逐页校验通过。

po_app/static/style.css

@@ -119,6 +119,16 @@ table.grid tr.row-off .btn { opacity: .8; }
 .seal-code { font-family: Arial, "Helvetica Neue", sans-serif; font-weight: 400; }
 
 .notification-wide { grid-column: 1 / -1; }
+.tracking-summary { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 14px; padding: 8px 0 16px; }
+.tracking-forms { display: grid; grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); gap: 24px; }
+.tracking-forms form { min-width: 0; padding-top: 4px; border-top: 1px solid #e2e6ea; }
+.tracking-stat { color: #222; }
+.tracking-stat:hover { border-color: #1668dc; text-decoration: none; background: #f7faff; }
+.tracking-warning { color: #a35c00; font-size: 12px; margin-top: 4px; }
+.badge.track-unknown { background: #eef0f2; color: #666; }
+.badge.track-pending, .badge.track-unpaid { background: #fff4e0; color: #a35c00; }
+.badge.track-partial { background: #e6f0ff; color: #14509b; }
+.badge.track-received, .badge.track-delivered, .badge.track-paid { background: #e8f6ee; color: #12703f; }
 .mobile-only { display: none; }
 @media (max-width: 800px) {
   .topbar { height: auto; min-height: 52px; flex-wrap: wrap; gap: 12px; padding: 12px 16px; }
@@ -131,6 +141,8 @@ table.grid tr.row-off .btn { opacity: .8; }
   .form-grid, .form-grid.two { grid-template-columns: 1fr; }
   .form-grid > [style*="grid-column"] { grid-column: auto !important; }
   .stat-row { grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 8px; }
+  .tracking-summary { grid-template-columns: repeat(2, minmax(0, 1fr)); }
+  .tracking-forms { grid-template-columns: minmax(0, 1fr); }
   table.grid { min-width: 680px; }
   table.approval-flow { min-width: 0; }
   .mobile-only { display: block; }