chore: update release template preview dialog (#10673)

https://linear.app/unleash/issue/2-3888/update-the-release-templates-preview-dialog-to-match-the-new-designs

Updates the release template preview dialog when using the new "add
strategy" modal, so it better matches the new design.

Used the legacy file pattern to leave the previous modal component
unchanged.

<img width="992" height="467" alt="image"
src="https://github.com/user-attachments/assets/fd000822-c987-47be-b8a4-3f137e0291ec"
/>

<img width="979" height="576" alt="image"
src="https://github.com/user-attachments/assets/02a27d5c-4480-4a49-88ae-0d573ff0f640"
/>

frontend/src/component/feature/FeatureStrategy/FeatureStrategyMenu/FeatureStrategyMenu.tsx

@@ -19,6 +19,7 @@ import { useReleasePlans } from 'hooks/api/getters/useReleasePlans/useReleasePla
 import { useChangeRequestsEnabled } from 'hooks/useChangeRequestsEnabled';
 import { formatUnknownError } from 'utils/formatUnknownError';
 import useUiConfig from 'hooks/api/getters/useUiConfig/useUiConfig';
+import { LegacyReleasePlanReviewDialog } from 'component/feature/FeatureView/FeatureOverview/ReleasePlan/LegacyReleasePlanReviewDialog.tsx';
 import { ReleasePlanReviewDialog } from '../../FeatureView/FeatureOverview/ReleasePlan/ReleasePlanReviewDialog.tsx';
 import {
     FeatureStrategyMenuCards,
@@ -288,6 +289,8 @@ export const FeatureStrategyMenu = ({
                 )}
             </Dialog>
             {selectedTemplate && (
+                <>
+                    {newStrategyModalEnabled ? (
                         <ReleasePlanReviewDialog
                             open={addReleasePlanOpen}
                             setOpen={(open) => {
@@ -305,6 +308,26 @@ export const FeatureStrategyMenu = ({
                             environment={environmentId}
                             crProtected={crProtected}
                         />
+                    ) : (
+                        <LegacyReleasePlanReviewDialog
+                            open={addReleasePlanOpen}
+                            setOpen={(open) => {
+                                setAddReleasePlanOpen(open);
+                                if (!open) {
+                                    setIsStrategyMenuDialogOpen(true);
+                                }
+                            }}
+                            onConfirm={() => {
+                                addReleasePlan(selectedTemplate);
+                            }}
+                            template={selectedTemplate}
+                            projectId={projectId}
+                            featureName={featureId}
+                            environment={environmentId}
+                            crProtected={crProtected}
+                        />
+                    )}
+                </>
             )}
         </StyledStrategyMenu>
     );

frontend/src/component/feature/FeatureStrategy/FeatureStrategyMenu/FeatureStrategyMenuCard/FeatureStrategyMenuCard.tsx

@@ -22,7 +22,7 @@ const StyledCard = styled('div', {
     display: 'flex',
     alignItems: 'center',
     width: '100%',
-    height: '100%',
+    height: theme.spacing(10),
     maxWidth: '30rem',
     padding: theme.spacing(2),
     color: 'inherit',

frontend/src/component/feature/FeatureView/FeatureOverview/ReleasePlan/LegacyReleasePlanReviewDialog.tsx

@@ -0,0 +1,148 @@
+import type { IReleasePlanTemplate } from 'interfaces/releasePlans';
+import { ReleasePlan } from './ReleasePlan.tsx';
+import { useReleasePlanPreview } from 'hooks/useReleasePlanPreview';
+import {
+    styled,
+    Typography,
+    Alert,
+    Box,
+    IconButton,
+    Dialog,
+    DialogContent,
+    DialogActions,
+    Button,
+} from '@mui/material';
+import { useFeature } from 'hooks/api/getters/useFeature/useFeature';
+import { useReleasePlans } from 'hooks/api/getters/useReleasePlans/useReleasePlans';
+import ArrowBackIcon from '@mui/icons-material/ArrowBack';
+import CloseIcon from '@mui/icons-material/Close';
+
+const StyledDialog = styled(Dialog)(({ theme }) => ({
+    '& .MuiDialog-paper': {
+        borderRadius: theme.shape.borderRadiusLarge,
+        maxWidth: theme.spacing(85),
+    },
+}));
+
+const StyledDialogActions = styled(DialogActions)(({ theme }) => ({
+    padding: theme.spacing(2, 4, 4),
+}));
+
+const TopRow = styled(Box)(({ theme }) => ({
+    display: 'flex',
+    justifyContent: 'space-between',
+    marginBottom: theme.spacing(2),
+}));
+
+const BackButton = styled(Box)(({ theme }) => ({
+    display: 'flex',
+    alignItems: 'center',
+    cursor: 'pointer',
+}));
+
+const StyledBackIcon = styled(ArrowBackIcon)(({ theme }) => ({
+    marginRight: theme.spacing(1),
+    color: theme.palette.primary.main,
+    display: 'flex',
+    alignSelf: 'center',
+}));
+
+const BackText = styled(Typography)(({ theme }) => ({
+    fontWeight: theme.typography.fontWeightMedium,
+    display: 'flex',
+    alignItems: 'center',
+    lineHeight: 1,
+}));
+
+interface IReleasePlanAddDialogProps {
+    open: boolean;
+    setOpen: React.Dispatch<React.SetStateAction<boolean>>;
+    onConfirm: () => void;
+    template: IReleasePlanTemplate;
+    projectId: string;
+    featureName: string;
+    environment: string;
+    crProtected?: boolean;
+}
+
+export const LegacyReleasePlanReviewDialog = ({
+    open,
+    setOpen,
+    onConfirm,
+    template,
+    projectId,
+    featureName,
+    environment,
+    crProtected,
+}: IReleasePlanAddDialogProps) => {
+    const { feature } = useFeature(projectId, featureName);
+    const { releasePlans } = useReleasePlans(
+        projectId,
+        featureName,
+        environment,
+    );
+
+    const activeReleasePlan = releasePlans[0];
+
+    const environmentData = feature?.environments.find(
+        ({ name }) => name === environment,
+    );
+    const environmentEnabled = environmentData?.enabled;
+
+    const planPreview = useReleasePlanPreview(
+        template.id,
+        featureName,
+        environment,
+    );
+
+    const handleClose = () => setOpen(false);
+
+    return (
+        <StyledDialog open={open} onClose={handleClose} fullWidth maxWidth='md'>
+            <DialogContent>
+                <TopRow>
+                    <BackButton onClick={handleClose}>
+                        <StyledBackIcon />
+                        <BackText variant='body2' color='primary'>
+                            Go back
+                        </BackText>
+                    </BackButton>
+                    <IconButton
+                        size='small'
+                        onClick={handleClose}
+                        edge='end'
+                        aria-label='close'
+                    >
+                        <CloseIcon fontSize='small' />
+                    </IconButton>
+                </TopRow>
+
+                {activeReleasePlan && (
+                    <Alert severity='error' sx={{ mb: 1 }}>
+                        This feature environment currently has{' '}
+                        <strong>{activeReleasePlan.name}</strong> -{' '}
+                        <strong>{activeReleasePlan.milestones[0].name}</strong>
+                        {environmentEnabled ? ' running' : ' paused'}. Adding a
+                        new release plan will replace the existing release plan.
+                    </Alert>
+                )}
+                <div>
+                    <ReleasePlan plan={planPreview} readonly />
+                </div>
+                {crProtected && (
+                    <Typography sx={{ mt: 4 }}>
+                        <strong>Adding</strong> release template{' '}
+                        <strong>{template?.name}</strong> to{' '}
+                        <strong>{featureName}</strong> in{' '}
+                        <strong>{environment}</strong>.
+                    </Typography>
+                )}
+            </DialogContent>
+            <StyledDialogActions>
+                <Button variant='contained' color='primary' onClick={onConfirm}>
+                    {crProtected ? 'Add suggestion to draft' : 'Use template'}
+                </Button>
+            </StyledDialogActions>
+        </StyledDialog>
+    );
+};

frontend/src/component/feature/FeatureView/FeatureOverview/ReleasePlan/ReleasePlanReviewDialog.tsx

@@ -8,7 +8,6 @@ import {
     Box,
     IconButton,
     Dialog,
-    DialogContent,
     DialogActions,
     Button,
 } from '@mui/material';
@@ -16,43 +15,31 @@ import { useFeature } from 'hooks/api/getters/useFeature/useFeature';
 import { useReleasePlans } from 'hooks/api/getters/useReleasePlans/useReleasePlans';
 import ArrowBackIcon from '@mui/icons-material/ArrowBack';
 import CloseIcon from '@mui/icons-material/Close';
-import { useUiFlag } from 'hooks/useUiFlag.ts';
 
 const StyledDialog = styled(Dialog)(({ theme }) => ({
     '& .MuiDialog-paper': {
         borderRadius: theme.shape.borderRadiusLarge,
-        maxWidth: theme.spacing(85),
+        width: theme.breakpoints.values.md,
     },
 }));
 
-const StyledDialogActions = styled(DialogActions)(({ theme }) => ({
+const StyledHeader = styled(Box)(({ theme }) => ({
-    padding: theme.spacing(2, 4, 4),
-}));
-
-const TopRow = styled(Box)(({ theme }) => ({
     display: 'flex',
     justifyContent: 'space-between',
-    marginBottom: theme.spacing(2),
+    alignItems: 'center',
+    padding: theme.spacing(4, 4, 2, 4),
 }));
 
-const BackButton = styled(Box)(({ theme }) => ({
+const StyledSubHeader = styled(Box)(({ theme }) => ({
-    display: 'flex',
+    padding: theme.spacing(0, 3, 3, 3),
-    alignItems: 'center',
-    cursor: 'pointer',
 }));
 
 const StyledBackIcon = styled(ArrowBackIcon)(({ theme }) => ({
     marginRight: theme.spacing(1),
-    color: theme.palette.primary.main,
-    display: 'flex',
-    alignSelf: 'center',
 }));
 
-const BackText = styled(Typography)(({ theme }) => ({
+const StyledDialogActions = styled(DialogActions)(({ theme }) => ({
-    fontWeight: theme.typography.fontWeightMedium,
+    padding: theme.spacing(2, 4, 4),
-    display: 'flex',
-    alignItems: 'center',
-    lineHeight: 1,
 }));
 
 interface IReleasePlanAddDialogProps {
@@ -82,7 +69,6 @@ export const ReleasePlanReviewDialog = ({
         featureName,
         environment,
     );
-    const newStrategyModalEnabled = useUiFlag('newStrategyModal');
 
     const activeReleasePlan = releasePlans[0];
 
@@ -101,14 +87,8 @@ export const ReleasePlanReviewDialog = ({
 
     return (
         <StyledDialog open={open} onClose={handleClose} fullWidth maxWidth='md'>
-            <DialogContent>
+            <StyledHeader>
-                <TopRow>
+                <Typography variant='h2'>Add strategy</Typography>
-                    <BackButton onClick={handleClose}>
-                        <StyledBackIcon />
-                        <BackText variant='body2' color='primary'>
-                            Go back
-                        </BackText>
-                    </BackButton>
                 <IconButton
                     size='small'
                     onClick={handleClose}
@@ -117,36 +97,40 @@ export const ReleasePlanReviewDialog = ({
                 >
                     <CloseIcon fontSize='small' />
                 </IconButton>
-                </TopRow>
+            </StyledHeader>
-
+            <StyledSubHeader>
+                <Button variant='text' onClick={handleClose}>
+                    <StyledBackIcon />
+                    Go back
+                </Button>
+            </StyledSubHeader>
             {activeReleasePlan && (
-                    <Alert severity='error' sx={{ mb: 1 }}>
+                <Box sx={{ px: 4, pb: 2 }}>
+                    <Alert severity='error'>
                         This feature environment currently has{' '}
                         <strong>{activeReleasePlan.name}</strong> -{' '}
                         <strong>{activeReleasePlan.milestones[0].name}</strong>
                         {environmentEnabled ? ' running' : ' paused'}. Adding a
                         new release plan will replace the existing release plan.
                     </Alert>
+                </Box>
             )}
-                <div>
+            <Box sx={{ px: 2 }}>
                 <ReleasePlan plan={planPreview} readonly />
-                </div>
+            </Box>
             {crProtected && (
-                    <Typography sx={{ mt: 4 }}>
+                <Box sx={{ px: 4, pt: 1 }}>
+                    <Typography>
                         <strong>Adding</strong> release template{' '}
                         <strong>{template?.name}</strong> to{' '}
                         <strong>{featureName}</strong> in{' '}
                         <strong>{environment}</strong>.
                     </Typography>
+                </Box>
             )}
-            </DialogContent>
             <StyledDialogActions>
                 <Button variant='contained' color='primary' onClick={onConfirm}>
-                    {crProtected
+                    {crProtected ? 'Add suggestion to draft' : 'Apply template'}
-                        ? 'Add suggestion to draft'
-                        : newStrategyModalEnabled
-                          ? 'Apply template'
-                          : 'Use template'}
                 </Button>
             </StyledDialogActions>
         </StyledDialog>