Hide Private Notes behind PRIVATE_NOTES beta flag

Gate the Private Notes UI entry points in ReportDetailsPage and
ProfilePage behind isBetaEnabled(CONST.BETAS.PRIVATE_NOTES) instead
of removing the feature code entirely. Also skip the
getReportPrivateNote API fetch when the beta is disabled.

Since no backend sets this beta on any account, Private Notes is
effectively hidden for all users. The backend should also add
'privateNotes' to the explicitOnly beta configuration so that
BETAS.ALL does not enable it.

Co-authored-by: Cong Pham <suneox@users.noreply.github.com>

Author: MelvinBot

src/CONST/index.ts

@@ -887,6 +887,7 @@ const CONST = {
         BULK_EDIT: 'bulkEdit',
         NEW_MANUAL_EXPENSE_FLOW: 'newManualExpenseFlow',
         BULK_SUBMIT_APPROVE_PAY: 'bulkSubmitApprovePay',
+        PRIVATE_NOTES: 'privateNotes',
     },
     BUTTON_STATES: {
         DEFAULT: 'default',

src/pages/ProfilePage.tsx

@@ -21,6 +21,7 @@ import useCurrentUserPersonalDetails from '@hooks/useCurrentUserPersonalDetails'
 import {useMemoizedLazyExpensifyIcons} from '@hooks/useLazyAsset';
 import useLocalize from '@hooks/useLocalize';
 import useOnyx from '@hooks/useOnyx';
+import usePermissions from '@hooks/usePermissions';
 import useThemeStyles from '@hooks/useThemeStyles';
 import createDynamicRoute from '@libs/Navigation/helpers/dynamicRoutesUtils/createDynamicRoute';
 import Navigation from '@libs/Navigation/Navigation';
@@ -90,6 +91,7 @@ function ProfilePage({route}: ProfilePageProps) {
 
     const styles = useThemeStyles();
     const {translate, formatPhoneNumber} = useLocalize();
+    const {isBetaEnabled} = usePermissions();
 
     const isValidAccountID = isValidAccountRoute(accountID);
     const loginParams = route.params?.login;
@@ -266,7 +268,7 @@ function ProfilePage({route}: ProfilePageProps) {
                                 }}
                             />
                         )}
-                        {!isEmptyObject(report) && !!report.reportID && !isCurrentUser && (
+                        {isBetaEnabled(CONST.BETAS.PRIVATE_NOTES) && !isEmptyObject(report) && !!report.reportID && !isCurrentUser && (
                             <MenuItem
                                 title={`${translate('privateNotes.title')}`}
                                 titleStyle={styles.flex1}

src/pages/ReportDetailsPage.tsx

@@ -38,6 +38,7 @@ import useNetwork from '@hooks/useNetwork';
 import useOnyx from '@hooks/useOnyx';
 import usePaginatedReportActions from '@hooks/usePaginatedReportActions';
 import useParentReportAction from '@hooks/useParentReportAction';
+import usePermissions from '@hooks/usePermissions';
 import usePreferredPolicy from '@hooks/usePreferredPolicy';
 import useReportAttributes from '@hooks/useReportAttributes';
 import useReportIsArchived from '@hooks/useReportIsArchived';
@@ -162,6 +163,7 @@ type CaseID = ValueOf<typeof CASES>;
 function ReportDetailsPage({policy, report, route, reportMetadata}: ReportDetailsPageProps) {
     const {translate, localeCompare, formatPhoneNumber} = useLocalize();
     const {isOffline} = useNetwork();
+    const {isBetaEnabled} = usePermissions();
     const {isRestrictedToPreferredPolicy, preferredPolicyID} = usePreferredPolicy();
     const activePolicy = useActivePolicy();
     const styles = useThemeStyles();
@@ -323,14 +325,16 @@ function ReportDetailsPage({policy, report, route, reportMetadata}: ReportDetail
     const reportAttributes = useReportAttributes();
     const isWorkspaceChat = useMemo(() => isWorkspaceChatUtil(report?.chatType ?? ''), [report?.chatType]);
 
+    const isPrivateNotesEnabled = isBetaEnabled(CONST.BETAS.PRIVATE_NOTES);
+
     useEffect(() => {
-        // Do not fetch private notes if isLoadingPrivateNotes is already defined, or if the network is offline, or if the report is a self DM.
-        if (isPrivateNotesFetchTriggered || isOffline || isSelfDM) {
+        // Do not fetch private notes if the beta is disabled, isLoadingPrivateNotes is already defined, the network is offline, or if the report is a self DM.
+        if (!isPrivateNotesEnabled || isPrivateNotesFetchTriggered || isOffline || isSelfDM) {
             return;
         }
 
         getReportPrivateNote(report?.reportID);
-    }, [report?.reportID, isOffline, isPrivateNotesFetchTriggered, isSelfDM]);
+    }, [report?.reportID, isOffline, isPrivateNotesFetchTriggered, isSelfDM, isPrivateNotesEnabled]);
 
     const leaveChat = useCallback(() => {
         if (isRootGroupChat) {
@@ -526,8 +530,8 @@ function ReportDetailsPage({policy, report, route, reportMetadata}: ReportDetail
             }
         }
 
-        // Prevent displaying private notes option for threads and task reports
-        if (!isChatThread && !isMoneyRequestReport && !isInvoiceReport && !isTaskReport) {
+        // Prevent displaying private notes option for threads and task reports, or when the beta is disabled
+        if (isBetaEnabled(CONST.BETAS.PRIVATE_NOTES) && !isChatThread && !isMoneyRequestReport && !isInvoiceReport && !isTaskReport) {
             items.push({
                 key: CONST.REPORT_DETAILS_MENU_ITEM.PRIVATE_NOTES,
                 translationKey: 'privateNotes.title',
@@ -651,6 +655,7 @@ function ReportDetailsPage({policy, report, route, reportMetadata}: ReportDetail
         ownerBillingGracePeriodEnd,
         iouTransaction,
         delegateEmail,
+        isBetaEnabled,
     ]);
 
     const displayNamesWithTooltips = useMemo(() => {