feature(FR-467): Enhance Sidebar and Card UI (#3117)

resolves #NNN (FR-467)

**changes**
* add margin to sidebar menu
* add `overflow: hidden` to card css

**Checklist:** (if applicable)

- [ ] Documentation
- [ ] Minium required manager version
- [ ] Specific setting for review (eg., KB link, endpoint or how to setup)
- [ ] Minimum requirements to check during review
- [ ] Test case(s) to demonstrate the difference of before/after

Author: nowgnuesLee

react/src/components/BAIMenu.tsx

@@ -41,7 +41,6 @@ const BAIMenu: React.FC<BAIMenuProps> = ({ collapsed, ...props }) => {
             itemHeight: 40,
             itemBorderRadius: 20,
             itemMarginInline: token.margin,
-            itemMarginBlock: 0,
             itemSelectedBg: colorPrimaryWithAlpha,
             fontSize: token.fontSizeLG,
           },

src/components/lablup-activity-panel.ts

@@ -68,6 +68,7 @@ export default class LablupActivityPanel extends LitElement {
           line-height: 1.1;
           color: var(--token-colorText);
           border: 1px solid var(--token-colorBorderSecondary, #424242);
+          overflow: hidden;
         }
 
         div.card > h4 {