diff --git a/frontend/src/App.css b/frontend/src/App.css
index 7f20cfa..8bc0a44 100644
--- a/frontend/src/App.css
+++ b/frontend/src/App.css
@@ -63,6 +63,25 @@ body, #root {
 .sidebar-tree-scroll-shell .ant-tree .ant-tree-node-content-wrapper {
   width: auto !important;
   min-width: 0;
+  display: flex !important;
+  align-items: center;
+  gap: 8px;
+}
+
+.sidebar-tree-scroll-shell .ant-tree .ant-tree-switcher {
+  flex: 0 0 24px;
+  width: 24px;
+  min-width: 24px;
+}
+
+.sidebar-tree-scroll-shell .ant-tree .ant-tree-iconEle {
+  flex: 0 0 16px;
+  width: 16px;
+  min-width: 16px;
+  display: inline-flex;
+  align-items: center;
+  justify-content: center;
+  margin-inline-end: 0;
 }
 
 .sidebar-tree-scroll-shell .ant-tree .ant-tree-title {
diff --git a/frontend/src/sidebarTreeScrollCss.test.ts b/frontend/src/sidebarTreeScrollCss.test.ts
index 7f540be..96c507c 100644
--- a/frontend/src/sidebarTreeScrollCss.test.ts
+++ b/frontend/src/sidebarTreeScrollCss.test.ts
@@ -18,6 +18,9 @@ describe('sidebar tree horizontal scroll css', () => {
     expect(appCss).toMatch(/\.sidebar-tree-scroll-shell\s+\.ant-tree\s+\.ant-tree-node-content-wrapper\s*\{[^}]*width:\s*auto\s*!important;[^}]*min-width:\s*0;/s);
     expect(appCss).not.toMatch(/\.sidebar-tree-scroll-shell\s+\.ant-tree\s+\.ant-tree-node-content-wrapper\s*\{[^}]*max-content/s);
 
+    expect(appCss).toMatch(/\.sidebar-tree-scroll-shell\s+\.ant-tree\s+\.ant-tree-switcher\s*\{[^}]*width:\s*24px;[^}]*min-width:\s*24px;/s);
+    expect(appCss).toMatch(/\.sidebar-tree-scroll-shell\s+\.ant-tree\s+\.ant-tree-iconEle\s*\{[^}]*width:\s*16px;[^}]*min-width:\s*16px;/s);
+
     expect(appCss).toMatch(/\.sidebar-tree-scroll-shell\s+\.ant-tree\s+\.ant-tree-title\s*\{[^}]*min-width:\s*0;[^}]*overflow:\s*visible;/s);
     expect(appCss).not.toMatch(/\.sidebar-tree-scroll-shell\s+\.ant-tree\s+\.ant-tree-title\s*\{[^}]*max-content/s);
   });