Update the design of change request filters to be one contiguous button instead of separate buttons.

This is in prep for adding a new set of filters, which will make each group visually separated.

frontend/src/component/changeRequest/ChangeRequests/ChangeRequestFilters.tsx

@@ -1,8 +1,10 @@
-import { Box, Chip, styled } from '@mui/material';
+import { Box, Chip, styled, type ChipProps } from '@mui/material';
 import { useState, type FC } from 'react';
 
-const StyledChip = styled(Chip)(({ theme }) => ({
+const makeStyledChip = (ariaControlTarget: string) =>
-    borderRadius: `${theme.shape.borderRadius}px`,
+    styled(({ ...props }: ChipProps) => (
+        <Chip variant='outlined' aria-controls={ariaControlTarget} {...props} />
+    ))<ChipProps>(({ theme, label }) => ({
         padding: theme.spacing(0.5),
         fontSize: theme.typography.body2.fontSize,
         height: 'auto',
@@ -16,6 +18,30 @@ const StyledChip = styled(Chip)(({ theme }) => ({
             outline: `1px solid ${theme.palette.primary.main}`,
             borderColor: theme.palette.primary.main,
         },
+
+        borderRadius: 0,
+        '&:first-of-type': {
+            borderTopLeftRadius: theme.shape.borderRadius,
+            borderBottomLeftRadius: theme.shape.borderRadius,
+        },
+        '&:last-of-type': {
+            borderTopRightRadius: theme.shape.borderRadius,
+            borderBottomRightRadius: theme.shape.borderRadius,
+        },
+
+        '& .MuiChip-label': {
+            position: 'relative',
+            textAlign: 'center',
+            '&::before': {
+                content: `'${label}'`,
+                fontWeight: 'bold',
+                visibility: 'hidden',
+                height: 0,
+                display: 'block',
+                overflow: 'hidden',
+                userSelect: 'none',
+            },
+        },
     }));
 
 export type ChangeRequestQuickFilter = 'Created' | 'Approval Requested';
@@ -34,12 +60,11 @@ const Wrapper = styled(Box)(({ theme }) => ({
     gap: theme.spacing(2),
 }));
 
-const StyledContainer = styled(Box)(({ theme }) => ({
+const StyledContainer = styled(Box)({
     display: 'flex',
     alignItems: 'center',
     flexWrap: 'wrap',
-    gap: theme.spacing(1),
+});
-}));
 
 export const ChangeRequestFilters: FC<IChangeRequestFiltersProps> = ({
     onSelectionChange,
@@ -57,22 +82,20 @@ export const ChangeRequestFilters: FC<IChangeRequestFiltersProps> = ({
         onSelectionChange(value);
     };
 
+    const StyledChip = makeStyledChip(ariaControlTarget);
+
     return (
         <Wrapper>
             <StyledContainer>
                 <StyledChip
                     label={'Created'}
-                    variant='outlined'
                     aria-current={selected === 'Created'}
-                    aria-controls={ariaControlTarget}
                     onClick={handleSelectionChange('Created')}
                     title={'Show change requests created by you'}
                 />
                 <StyledChip
                     label={'Approval Requested'}
-                    variant='outlined'
                     aria-current={selected === 'Approval Requested'}
-                    aria-controls={ariaControlTarget}
                     onClick={handleSelectionChange('Approval Requested')}
                     title={'Show change requests requesting your approval'}
                 />