fix: update function calls to use optional chaining and improve CSS class handling

Author: AbhishekA1509

src/components/v2/appDetails/NodeTreeDetailTab.tsx

@@ -115,7 +115,7 @@ const NodeTreeDetailTab = ({
             return
         }
         if (stickyElementRef.current) {
-            handleScrollToTop() // or your scroll container
+            handleScrollToTop()
         }
     }
 

src/components/v2/appDetails/k8Resource/nodeDetail/NodeDetail.component.tsx

@@ -369,7 +369,7 @@ const NodeDetailComponent = ({
 
     const handleManifestEdit = () => {
         if (manifestFormConfigurationType === ConfigurationType.YAML) {
-            handleStickDynamicTabsToTop()
+            handleStickDynamicTabsToTop?.()
         }
         setManifestCodeEditorMode(ManifestCodeEditorMode.EDIT)
     }

src/components/v2/appDetails/k8Resource/nodeDetail/NodeDetailTabs/Manifest.component.tsx

@@ -767,7 +767,7 @@ const ManifestComponent = ({
         </div>
     ) : (
         <div
-            className="flexbox-col flex-grow-1"
+            className={`flexbox-col flex-grow-1 ${isResourceBrowserView ? 'dc__overflow-auto' : ''}`}
             data-testid="app-manifest-container"
             style={{
                 background: 'var(--terminal-bg)',

src/css/base.scss

@@ -354,10 +354,6 @@ a:focus {
     top: 36px;
 }
 
-.dc__top-43 {
-    top: 43px;
-}
-
 .dc__top-44 {
     top: 44px;
 }