优化拖拽

apps/frontend/src/styles/base.css

@@ -232,9 +232,74 @@ select {
 }
 
 .image-upload-droppable {
+  position: relative;
   display: grid;
   gap: 8px;
   justify-items: start;
+  border-radius: 10px;
+  padding: 6px;
+  margin: -6px;
+  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
+}
+
+.image-upload-droppable.is-dragging {
+  background: var(--theme-primary-soft, #fff3e8);
+}
+
+.image-upload-drag-overlay {
+  position: absolute;
+  inset: 0;
+  z-index: 10;
+  display: flex;
+  flex-direction: column;
+  align-items: center;
+  justify-content: center;
+  gap: 6px;
+  background: rgba(255, 255, 255, 0.94);
+  backdrop-filter: blur(4px);
+  border: 2px dashed var(--theme-primary, #ff6a00);
+  border-radius: 10px;
+  color: var(--theme-primary, #ff6a00);
+  pointer-events: none;
+  animation: uploadFadeIn 0.15s ease-out;
+  box-shadow: 0 8px 24px var(--theme-primary-shadow, rgba(255, 106, 0, 0.14));
+}
+
+.image-upload-drag-icon {
+  font-size: 32px;
+  color: var(--theme-primary, #ff6a00);
+  animation: uploadBounce 0.8s infinite alternate ease-in-out;
+}
+
+.image-upload-drag-text {
+  font-size: 13px;
+  font-weight: 600;
+  color: #1e293b;
+}
+
+.image-upload-drag-subtext {
+  font-size: 11px;
+  color: #64748b;
+}
+
+@keyframes uploadFadeIn {
+  from {
+    opacity: 0;
+    transform: scale(0.98);
+  }
+  to {
+    opacity: 1;
+    transform: scale(1);
+  }
+}
+
+@keyframes uploadBounce {
+  from {
+    transform: translateY(0);
+  }
+  to {
+    transform: translateY(-4px);
+  }
 }
 
 .image-upload-hint {