Gate export/import command menu items by permission flag (#19991)

## Summary
- Hides the `exportRecords`, `exportView`, and `importRecords` command
menu actions from
users whose role does not hold the matching `EXPORT_CSV` / `IMPORT_CSV`
permission flag.
- Exposes the current user's role permission flags to
`conditionalAvailabilityExpression`
by adding `permissionFlags: Record<string, boolean>` to
`CommandMenuContextApi`, mirroring
 how `featureFlags` is already accessible.
- Adds a `2.1.0` workspace upgrade command that rewrites the three
existing rows on every
 active/suspended workspace.

## Before
<img width="1294" height="287" alt="Screenshot 2026-04-22 at 19 37 40"
src="https://github.com/user-attachments/assets/11ca8635-14d7-40a0-9ca0-76329c54e3c6"
/>

## After
<img width="1283" height="285" alt="Screenshot 2026-04-22 at 19 32 25"
src="https://github.com/user-attachments/assets/5e49fa8a-4541-42ee-96da-4c1de7d00aae"
/>

packages/twenty-front/src/modules/command-menu-item/components/StandalonePageCommandMenu.tsx

@@ -1,3 +1,4 @@
+import { currentUserWorkspaceState } from '@/auth/states/currentUserWorkspaceState';
 import { currentWorkspaceState } from '@/auth/states/currentWorkspaceState';
 import { objectPermissionsFamilySelector } from '@/auth/states/objectPermissionsFamilySelector';
 import { CommandMenuContext } from '@/command-menu-item/contexts/CommandMenuContext';
@@ -25,6 +26,7 @@ export const StandalonePageCommandMenu = () => {
   const isMobile = useIsMobile();
   const commandMenuItems = useAtomStateValue(commandMenuItemsSelector);
   const currentWorkspace = useAtomStateValue(currentWorkspaceState);
+  const currentUserWorkspace = useAtomStateValue(currentUserWorkspaceState);
   const currentPageLayoutId = useAtomStateValue(currentPageLayoutIdState);
   const isLayoutCustomizationModeEnabled = useAtomStateValue(
     isLayoutCustomizationModeEnabledState,
@@ -38,6 +40,12 @@ export const StandalonePageCommandMenu = () => {
       featureFlags[flag.key] = flag.value === true;
     }
 
+    const permissionFlags: Record<string, boolean> = {};
+
+    for (const flag of currentUserWorkspace?.permissionFlags ?? []) {
+      permissionFlags[flag] = true;
+    }
+
     const targetObjectReadPermissions: Record<string, boolean> = {};
     const targetObjectWritePermissions: Record<string, boolean> = {};
 
@@ -74,6 +82,7 @@ export const StandalonePageCommandMenu = () => {
       },
       selectedRecords: [],
       featureFlags,
+      permissionFlags,
       targetObjectReadPermissions,
       targetObjectWritePermissions,
       objectMetadataItem: {},
@@ -81,6 +90,7 @@ export const StandalonePageCommandMenu = () => {
     };
   }, [
     currentWorkspace?.featureFlags,
+    currentUserWorkspace?.permissionFlags,
     isLayoutCustomizationModeEnabled,
     objectMetadataItems,
     store,