chore: add warning about release plans in import-export (#10805)

https://linear.app/unleash/issue/2-3965/add-a-note-if-were-exporting-that-we-dont-understand-release-plans-in

Adds a warning about release plans in import/export.

It's not trivial to know every flag that will be exported in every
scenario, and whether they have release plans, so our logic here is
"have you configured release templates?"

<img width="706" height="516" alt="image"
src="https://github.com/user-attachments/assets/68ba8618-9887-491c-b46e-256b45700d74"
/>

<img width="732" height="503" alt="image"
src="https://github.com/user-attachments/assets/086e37d4-78ae-4647-93a2-5d1845c2758a"
/>

frontend/src/component/feature/FeatureToggleList/ExportDialog.tsx

@@ -1,5 +1,5 @@
 import { createRef, useState } from 'react';
-import { styled, Typography, Box } from '@mui/material';
+import { styled, Typography, Box, Alert } from '@mui/material';
 import { Dialogue } from 'component/common/Dialogue/Dialogue';
 import GeneralSelect from 'component/common/GeneralSelect/GeneralSelect';
 import { useExportApi } from 'hooks/api/actions/useExportApi/useExportApi';
@@ -8,10 +8,11 @@ import type { FeatureSchema } from 'openapi';
 
 import { formatUnknownError } from 'utils/formatUnknownError';
 import { ConditionallyRender } from '../../common/ConditionallyRender/ConditionallyRender.tsx';
+import { useReleasePlanTemplates } from 'hooks/api/getters/useReleasePlanTemplates/useReleasePlanTemplates.ts';
 
 interface IExportDialogProps {
     showExportDialog: boolean;
-    data: Pick<FeatureSchema, 'name'>[];
+    data: Pick<FeatureSchema, 'name' | 'environments'>[];
     project?: string;
     onClose: () => void;
     onConfirm?: () => void;
@@ -35,6 +36,8 @@ export const ExportDialog = ({
     const { createExport } = useExportApi();
     const ref = createRef<HTMLDivElement>();
     const { setToastApiError } = useToast();
+    const { templates } = useReleasePlanTemplates();
+    const hasReleaseTemplates = Boolean(templates.length);
 
     const getOptions = () =>
         environments.map((env) => ({
@@ -88,6 +91,13 @@ export const ExportDialog = ({
             secondaryButtonText='Cancel'
         >
             <Box ref={ref}>
+                {hasReleaseTemplates && (
+                    <Alert severity='warning' sx={{ mb: 4 }}>
+                        Exporting does not include release plans. You may need
+                        to set up new release plans for the imported feature
+                        flags.
+                    </Alert>
+                )}
                 <ConditionallyRender
                     condition={data.length > 0}
                     show={

frontend/src/component/project/Project/Import/configure/ImportExplanation.tsx

@@ -1,5 +1,6 @@
 import type { FC } from 'react';
 import { Box, styled, Typography } from '@mui/material';
+import { useReleasePlanTemplates } from 'hooks/api/getters/useReleasePlanTemplates/useReleasePlanTemplates';
 
 const ImportExplanationContainer = styled(Box)(({ theme }) => ({
     backgroundColor: theme.palette.background.elevation2,
@@ -17,7 +18,10 @@ const ImportExplanationDescription = styled(Box)(({ theme }) => ({
     fontSize: theme.fontSizes.smallBody,
 }));
 
-export const ImportExplanation: FC = () => (
+export const ImportExplanation: FC = () => {
+    const { templates } = useReleasePlanTemplates();
+    const hasReleaseTemplates = Boolean(templates.length);
+    return (
         <ImportExplanationContainer>
             <ImportExplanationHeader>
                 What is being imported?
@@ -36,14 +40,23 @@ export const ImportExplanation: FC = () => (
             </ImportExplanationDescription>
             <ImportExplanationHeader>Exceptions?</ImportExplanationHeader>
             <ImportExplanationDescription>
-            If the feature flag already exists in the new instance, it will be
-            overwritten
+                If the feature flag already exists in the new instance, it will
+                be overwritten
             </ImportExplanationDescription>
-        <ImportExplanationHeader>What is not imported?</ImportExplanationHeader>
+            <ImportExplanationHeader>
+                What is not imported?
+            </ImportExplanationHeader>
             <ImportExplanationDescription sx={{ marginBottom: 0 }}>
-            If we detect segments or custom strategies in your imported file, we
-            will stop the import. You need to create them first in the new
-            instance and run the import again
+                If we detect segments or custom strategies in your imported
+                file, we will stop the import. You need to create them first in
+                the new instance and run the import again
             </ImportExplanationDescription>
+            {hasReleaseTemplates && (
+                <ImportExplanationDescription sx={{ marginTop: 2 }}>
+                    Release plans are not included in the import. You may need
+                    to set up new release plans for the imported feature flags
+                </ImportExplanationDescription>
+            )}
         </ImportExplanationContainer>
     );
+};

frontend/src/component/project/Project/PaginatedProjectFeatureToggles/ProjectFeatureTogglesHeader/ProjectFeatureTogglesHeader.tsx

@@ -1,5 +1,5 @@
 import { type FC, type ReactNode, useState } from 'react';
-import { Box, IconButton, Tooltip } from '@mui/material';
+import { Box, IconButton, styled, Tooltip } from '@mui/material';
 import useLoading from 'hooks/useLoading';
 import { PageHeader } from 'component/common/PageHeader/PageHeader';
 import { useRequiredPathParam } from 'hooks/useRequiredPathParam';
@@ -8,6 +8,10 @@ import IosShare from '@mui/icons-material/IosShare';
 import { FlagCreationButton } from './FlagCreationButton/FlagCreationButton.tsx';
 import { ImportButton } from './ImportButton/ImportButton.tsx';
 
+const StyledIconButton = styled(IconButton)(({ theme }) => ({
+    padding: theme.spacing(1.5),
+}));
+
 type ProjectFeatureTogglesHeaderProps = {
     isLoading?: boolean;
     totalItems?: number;
@@ -39,12 +43,12 @@ export const ProjectFeatureTogglesHeader: FC<
                     <>
                         {actions}
                         <Tooltip title='Export all project flags' arrow>
-                            <IconButton
+                            <StyledIconButton
                                 data-loading
                                 onClick={() => setShowExportDialog(true)}
                             >
                                 <IosShare />
-                            </IconButton>
+                            </StyledIconButton>
                         </Tooltip>
                         <ImportButton />
 

src/lib/features/feature-toggle/fakes/fake-feature-strategies-store.ts

@@ -335,7 +335,8 @@ export default class FakeFeatureStrategiesStore
             this.featureStrategies.filter(
                 (strategy) =>
                     features.includes(strategy.featureName) &&
-                    strategy.environment === environment,
+                    strategy.environment === environment &&
+                    !strategy.milestoneId,
             ),
         );
     }

src/lib/features/feature-toggle/feature-toggle-strategies-store.ts

@@ -278,6 +278,7 @@ class FeatureStrategiesStore implements IFeatureStrategiesStore {
             .select(COLUMNS)
             .from<IFeatureStrategiesTable>(T.featureStrategies)
             .whereIn('feature_name', features)
+            .andWhere('milestone_id', null)
             .orderBy('feature_name', 'asc');
         if (environment) {
             query.where('environment', environment);