fix(course-outline): avoid re-finding section

Author: navinkarkera

src/course-outline/outline-sidebar/AddSidebar.tsx

@@ -397,8 +397,8 @@ export const AddSidebar = () => {
 
     const { currentId, subsectionId, sectionId } = selectedContainerState;
     const sectionIndex = sections.findIndex((section) => section.id === sectionId);
-    const subsectionIndex = sections
-      .find((section) => section.id === sectionId)
+    const section = sectionIndex >= 0 ? sections[sectionIndex] : undefined;
+    const subsectionIndex = section
       ?.childInfo.children.findIndex((subsection) => subsection.id === subsectionId) ?? -1;
 
     if (currentId === subsectionId && sectionId) {

src/course-outline/outline-sidebar/OutlineAlignSidebar.tsx

@@ -19,8 +19,8 @@ export const OutlineAlignSidebar = () => {
   const handleBack = () => {
     const { currentId, subsectionId, sectionId } = selectedContainerState || {};
     const sectionIndex = sections.findIndex((section) => section.id === sectionId);
-    const subsectionIndex = sections
-      .find((section) => section.id === sectionId)
+    const section = sectionIndex >= 0 ? sections[sectionIndex] : undefined;
+    const subsectionIndex = section
       ?.childInfo.children.findIndex((subsection) => subsection.id === subsectionId) ?? -1;
 
     if (!currentId) {