feat: 落地UI动效——表单错误抖动/数字滚动/卡片悬浮

- 新增styles/transitions.css: 错误shake/按钮状态/弹窗过渡/骨架屏淡入(带prefers-reduced-motion)
- 新增CountUp.vue: KPI数字滚动组件(easeOutCubic+千分位+闪烁提示)
- Dashboard: CEO/IT视图摘要卡片接入CountUp
- main.ts引入全局动效

frontend/src/styles/transitions.css

@@ -0,0 +1,103 @@
+/* ============================================
+   CMA 全局动效 — 借鉴 Transitions.dev / BeUI 模式
+   纯CSS实现，Vue3 + Element Plus 覆盖层
+   ============================================ */
+
+/* ── 1. 表单校验失败抖动 ── */
+@keyframes cma-shake {
+  0%, 100% { transform: translateX(0); }
+  20% { transform: translateX(-6px); }
+  40% { transform: translateX(6px); }
+  60% { transform: translateX(-4px); }
+  80% { transform: translateX(4px); }
+}
+.el-form-item.is-error .el-input__wrapper,
+.el-form-item.is-error .el-select__wrapper,
+.el-form-item.is-error .el-textarea__inner {
+  animation: cma-shake 0.4s ease-in-out;
+}
+
+/* ── 2. 按钮状态机：成功/错误反馈 ── */
+@keyframes cma-btn-success {
+  0% { transform: scale(1); }
+  50% { transform: scale(1.05); }
+  100% { transform: scale(1); }
+}
+.el-button.is-success-pop {
+  background: #67c23a !important;
+  border-color: #67c23a !important;
+  animation: cma-btn-success 0.3s ease;
+}
+.el-button.is-error-pop {
+  background: #f56c6c !important;
+  border-color: #f56c6c !important;
+  animation: cma-btn-success 0.3s ease;
+}
+
+/* ── 3. 数字滚动时高亮 ── */
+@keyframes cma-count-flash {
+  0% { color: #409eff; }
+  100% { color: inherit; }
+}
+.cma-count-up {
+  font-variant-numeric: tabular-nums;
+  transition: color 0.3s;
+}
+.cma-count-up.is-flashing {
+  animation: cma-count-flash 0.6s ease;
+}
+
+/* ── 4. 弹窗/抽屉开合过渡（缩放+淡入，从触发点展开） ── */
+.cma-dialog-fade-enter-active {
+  transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
+}
+.cma-dialog-fade-leave-active {
+  transition: all 0.15s ease;
+}
+.cma-dialog-fade-enter-from {
+  opacity: 0;
+  transform: scale(0.95) translateY(-8px);
+}
+.cma-dialog-fade-leave-to {
+  opacity: 0;
+  transform: scale(0.97);
+}
+
+/* ── 5. 骨架屏 → 内容交叉淡入 ── */
+.cma-skeleton-fade-enter-active {
+  transition: opacity 0.35s ease;
+}
+.cma-skeleton-fade-enter-from {
+  opacity: 0;
+}
+
+/* ── 6. 列表行进入动画 ── */
+@keyframes cma-row-in {
+  from { opacity: 0; transform: translateY(6px); }
+  to { opacity: 1; transform: translateY(0); }
+}
+.cma-row-enter {
+  animation: cma-row-in 0.3s ease both;
+}
+
+/* ── 7. 卡片悬浮提升 ── */
+.cma-card-hover {
+  transition: transform 0.25s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.25s ease;
+}
+.cma-card-hover:hover {
+  transform: translateY(-2px);
+  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
+}
+
+/* ── 8. 无障碍：用户偏好减少动效时关闭 ── */
+@media (prefers-reduced-motion: reduce) {
+  .el-form-item.is-error .el-input__wrapper,
+  .el-form-item.is-error .el-select__wrapper,
+  .el-form-item.is-error .el-textarea__inner,
+  .cma-count-up.is-flashing,
+  .cma-row-enter,
+  .cma-card-hover {
+    animation: none !important;
+    transition: none !important;
+  }
+}