feat: show card action only on hover

libs/components/editor-blocks/src/blocks/group/scene-kanban/CardItem.tsx

@@ -1,14 +1,6 @@
-import { styled } from '@toeverything/components/ui';
-import { RenderBlock, useKanban } from '@toeverything/components/editor-core';
 import type { KanbanCard } from '@toeverything/components/editor-core';
-
-const CardContainer = styled('div')({
-    display: 'flex',
-    flexDirection: 'column',
-    backgroundColor: '#fff',
-    border: '1px solid #E2E7ED',
-    borderRadius: '5px',
-});
+import { RenderBlock, useKanban } from '@toeverything/components/editor-core';
+import { styled } from '@toeverything/components/ui';
 
 const CardContent = styled('div')({
     margin: '20px',
@@ -20,12 +12,16 @@ const CardActions = styled('div')({
     alignItems: 'center',
     width: '100%',
     height: '29px',
-    background: 'rgba(152, 172, 189, 0.1)',
     borderRadius: '0px 0px 5px 5px',
     padding: '6px 0 6px 19px',
     fontSize: '12px',
     fontWeight: '300',
     color: '#98ACBD',
+    transition: 'all ease-in 0.2s',
+
+    ':hover': {
+        background: '#F5F7F8',
+    },
 });
 
 const PlusIcon = styled('div')({
@@ -37,6 +33,23 @@ const PlusIcon = styled('div')({
     },
 });
 
+const CardContainer = styled('div')({
+    display: 'flex',
+    flexDirection: 'column',
+    backgroundColor: '#fff',
+    border: '1px solid #E2E7ED',
+    borderRadius: '5px',
+
+    [CardActions.toString()]: {
+        opacity: '0',
+    },
+    ':hover': {
+        [CardActions.toString()]: {
+            opacity: '1',
+        },
+    },
+});
+
 export const CardItem = ({
     id,
     block,
@@ -56,7 +69,7 @@ export const CardItem = ({
             </CardContent>
             <CardActions onClick={onAddItem}>
                 <PlusIcon />
-                Add item
+                <span>Add item</span>
             </CardActions>
         </CardContainer>
     );