feat: improve milestone visual states in release plans (#10775)

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

@@ -72,10 +72,14 @@ const StyledBody = styled('div')(({ theme }) => ({
     flexDirection: 'column',
 }));
 
-const StyledConnection = styled('div')(({ theme }) => ({
-    width: 4,
+const StyledConnection = styled('div', {
+    shouldForwardProp: (prop) => prop !== 'isCompleted',
+})<{ isCompleted: boolean }>(({ theme, isCompleted }) => ({
+    width: 2,
     height: theme.spacing(2),
-    backgroundColor: theme.palette.divider,
+    backgroundColor: isCompleted
+        ? theme.palette.divider
+        : theme.palette.primary.main,
     marginLeft: theme.spacing(3.25),
 }));
 
@@ -367,7 +371,11 @@ export const ReleasePlan = ({
                             />
                             <ConditionallyRender
                                 condition={isNotLastMilestone}
-                                show={<StyledConnection />}
+                                show={
+                                    <StyledConnection
+                                        isCompleted={index < activeIndex}
+                                    />
+                                }
                             />
                         </div>
                     );

frontend/src/component/feature/FeatureView/FeatureOverview/ReleasePlan/ReleasePlanMilestone/MilestoneAutomationSection.tsx

@@ -6,11 +6,14 @@ import { MilestoneTransitionDisplay } from './MilestoneTransitionDisplay.tsx';
 const StyledAutomationContainer = styled('div', {
     shouldForwardProp: (prop) => prop !== 'status',
 })<{ status?: MilestoneStatus }>(({ theme, status }) => ({
-    border: `1px solid ${status === 'active' ? theme.palette.success.border : theme.palette.divider}`,
+    border: `${status === 'active' ? '1.25px' : '1px'} solid ${status === 'active' ? theme.palette.success.border : theme.palette.divider}`,
     borderTop: `1px solid ${theme.palette.divider}`,
     borderRadius: `0 0 ${theme.shape.borderRadiusLarge}px ${theme.shape.borderRadiusLarge}px`,
     padding: theme.spacing(1.5, 2),
-    backgroundColor: theme.palette.background.paper,
+    backgroundColor:
+        status === 'completed'
+            ? theme.palette.background.default
+            : theme.palette.background.paper,
     display: 'flex',
     flexDirection: 'column',
     alignItems: 'stretch',
@@ -79,6 +82,7 @@ export const MilestoneAutomationSection = ({
                     intervalMinutes={transitionCondition.intervalMinutes}
                     onDelete={onDeleteAutomation!}
                     milestoneName={milestoneName}
+                    status={status}
                 />
             ) : (
                 <StyledAddAutomationButton

frontend/src/component/feature/FeatureView/FeatureOverview/ReleasePlan/ReleasePlanMilestone/MilestoneTransitionDisplay.tsx

@@ -2,6 +2,7 @@ import BoltIcon from '@mui/icons-material/Bolt';
 import DeleteOutlineIcon from '@mui/icons-material/DeleteOutline';
 import { IconButton, styled } from '@mui/material';
 import { formatDuration, intervalToDuration } from 'date-fns';
+import type { MilestoneStatus } from './ReleasePlanMilestoneStatus.tsx';
 
 const StyledDisplayContainer = styled('div')(({ theme }) => ({
     display: 'flex',
@@ -17,17 +18,27 @@ const StyledContentGroup = styled('div')(({ theme }) => ({
     gap: theme.spacing(1),
 }));
 
-const StyledIcon = styled(BoltIcon)(({ theme }) => ({
+const StyledIcon = styled(BoltIcon, {
+    shouldForwardProp: (prop) => prop !== 'status',
+})<{ status?: MilestoneStatus }>(({ theme, status }) => ({
     color: theme.palette.common.white,
     fontSize: 18,
     flexShrink: 0,
-    backgroundColor: theme.palette.primary.main,
+    backgroundColor:
+        status === 'completed'
+            ? theme.palette.neutral.border
+            : theme.palette.primary.main,
     borderRadius: '50%',
     padding: theme.spacing(0.25),
 }));
 
-const StyledText = styled('span')(({ theme }) => ({
-    color: theme.palette.text.primary,
+const StyledText = styled('span', {
+    shouldForwardProp: (prop) => prop !== 'status',
+})<{ status?: MilestoneStatus }>(({ theme, status }) => ({
+    color:
+        status === 'completed'
+            ? theme.palette.text.secondary
+            : theme.palette.text.primary,
     fontSize: theme.typography.body2.fontSize,
 }));
 
@@ -35,6 +46,7 @@ interface IMilestoneTransitionDisplayProps {
     intervalMinutes: number;
     onDelete: () => void;
     milestoneName: string;
+    status?: MilestoneStatus;
 }
 
 const formatInterval = (minutes: number): string => {
@@ -55,12 +67,13 @@ export const MilestoneTransitionDisplay = ({
     intervalMinutes,
     onDelete,
     milestoneName,
+    status,
 }: IMilestoneTransitionDisplayProps) => {
     return (
         <StyledDisplayContainer>
             <StyledContentGroup>
-                <StyledIcon />
-                <StyledText>
+                <StyledIcon status={status} />
+                <StyledText status={status}>
                     Proceed to the next milestone after{' '}
                     {formatInterval(intervalMinutes)}
                 </StyledText>

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

@@ -22,14 +22,17 @@ const StyledAccordion = styled(Accordion, {
     shouldForwardProp: (prop) => prop !== 'status' && prop !== 'hasAutomation',
 })<{ status: MilestoneStatus; hasAutomation?: boolean }>(
     ({ theme, status, hasAutomation }) => ({
-        border: `1px solid ${status === 'active' ? theme.palette.success.border : theme.palette.divider}`,
+        border: `${status === 'active' ? '1.25px' : '1px'} solid ${status === 'active' ? theme.palette.success.border : theme.palette.divider}`,
         borderBottom: hasAutomation
             ? 'none'
-            : `1px solid ${status === 'active' ? theme.palette.success.border : theme.palette.divider}`,
+            : `${status === 'active' ? '1.25px' : '1px'} solid ${status === 'active' ? theme.palette.success.border : theme.palette.divider}`,
         overflow: 'hidden',
         boxShadow: 'none',
         margin: 0,
-        backgroundColor: theme.palette.background.paper,
+        backgroundColor:
+            status === 'completed'
+                ? theme.palette.background.default
+                : theme.palette.background.paper,
         borderRadius: hasAutomation
             ? `${theme.shape.borderRadiusLarge}px ${theme.shape.borderRadiusLarge}px 0 0 !important`
             : `${theme.shape.borderRadiusLarge}px`,
@@ -54,8 +57,14 @@ const StyledTitleContainer = styled('div')(({ theme }) => ({
     gap: theme.spacing(0.5),
 }));
 
-const StyledTitle = styled('span')(({ theme }) => ({
+const StyledTitle = styled('span', {
+    shouldForwardProp: (prop) => prop !== 'status',
+})<{ status?: MilestoneStatus }>(({ theme, status }) => ({
     fontWeight: theme.fontWeight.bold,
+    color:
+        status === 'completed'
+            ? theme.palette.text.secondary
+            : theme.palette.text.primary,
 }));
 
 const StyledSecondaryLabel = styled('span')(({ theme }) => ({
@@ -100,7 +109,9 @@ export const ReleasePlanMilestone = ({
                 <StyledAccordion status={status} hasAutomation={showAutomation}>
                     <StyledAccordionSummary>
                         <StyledTitleContainer>
-                            <StyledTitle>{milestone.name}</StyledTitle>
+                            <StyledTitle status={status}>
+                                {milestone.name}
+                            </StyledTitle>
                             {!readonly && onStartMilestone && (
                                 <ReleasePlanMilestoneStatus
                                     status={status}
@@ -137,7 +148,9 @@ export const ReleasePlanMilestone = ({
             >
                 <StyledAccordionSummary expandIcon={<ExpandMore />}>
                     <StyledTitleContainer>
-                        <StyledTitle>{milestone.name}</StyledTitle>
+                        <StyledTitle status={status}>
+                            {milestone.name}
+                        </StyledTitle>
                         {!readonly && onStartMilestone && (
                             <ReleasePlanMilestoneStatus
                                 status={status}