Feat: sticky insights header and widget tooltip icon (#6537)

What it says on the tin

Closes #
[1-2182](https://linear.app/unleash/issue/1-2182/sticky-header-on-scroll)

<img width="1442" alt="Screenshot 2024-03-14 at 10 47 32"
src="https://github.com/Unleash/unleash/assets/104830839/5b57cd95-3c40-48e7-b25b-823df025e68c">


https://github.com/Unleash/unleash/assets/104830839/f5249fd6-a4cc-4e52-9b01-89ef3cbeb47c

---------

Signed-off-by: andreas-unleash <andreas@getunleash.ai>

frontend/src/component/executiveDashboard/ExecutiveDashboard.tsx

@@ -1,4 +1,4 @@
-import { VFC } from 'react';
+import { useState, VFC } from 'react';
 import { Box, styled } from '@mui/material';
 import { ArrayParam, withDefault } from 'use-query-params';
 import { ConditionallyRender } from 'component/common/ConditionallyRender/ConditionallyRender';
@@ -45,7 +45,19 @@ const ChartWidget = styled(Widget)(({ theme }) => ({
     },
 }));
 
+const StickyWrapper = styled(Box)<{ scrolled?: boolean }>(
+    ({ theme, scrolled }) => ({
+        position: 'sticky',
+        top: 0,
+        zIndex: 1000,
+        padding: scrolled ? theme.spacing(2, 0) : theme.spacing(0, 0, 2),
+        background: theme.palette.background.application,
+        transition: 'padding 0.3s ease',
+    }),
+);
+
 export const ExecutiveDashboard: VFC = () => {
+    const [scrolled, setScrolled] = useState(false);
     const { executiveDashboardData, loading, error } = useExecutiveDashboard();
     const stateConfig = {
         projects: withDefault(ArrayParam, [allOption.id]),
@@ -72,9 +84,21 @@ export const ExecutiveDashboard: VFC = () => {
     const summary = useFilteredFlagsSummary(projectsData);
     const isOneProjectSelected = projects.length === 1;
 
+    const handleScroll = () => {
+        if (!scrolled && window.scrollY > 0) {
+            setScrolled(true);
+        } else if (scrolled && window.scrollY === 0) {
+            setScrolled(false);
+        }
+    };
+
+    if (typeof window !== 'undefined') {
+        window.addEventListener('scroll', handleScroll);
+    }
+
     return (
         <>
-            <Box sx={(theme) => ({ paddingBottom: theme.spacing(4) })}>
+            <StickyWrapper scrolled={scrolled}>
                 <DashboardHeader
                     actions={
                         <ProjectSelect
@@ -85,7 +109,7 @@ export const ExecutiveDashboard: VFC = () => {
                         />
                     }
                 />
-            </Box>
+            </StickyWrapper>
             <StyledGrid>
                 <ConditionallyRender
                     condition={showAllProjects}

frontend/src/component/executiveDashboard/components/DashboardHeader/DashboardHeader.tsx

@@ -1,4 +1,4 @@
-import { ReactNode, VFC } from 'react';
+import { ReactNode, VFC, useState } from 'react';
 import { useUiFlag } from 'hooks/useUiFlag';
 import { useFeedback } from 'component/feedbackNew/useFeedback';
 import ReviewsOutlined from '@mui/icons-material/ReviewsOutlined';
@@ -8,6 +8,7 @@ import {
     styled,
     useMediaQuery,
     useTheme,
+    Box,
 } from '@mui/material';
 import { PageHeader } from 'component/common/PageHeader/PageHeader';
 import { Badge } from 'component/common/Badge/Badge';

frontend/src/component/executiveDashboard/components/LineChart/createChartOptions.ts

@@ -27,13 +27,15 @@ export const createOptions = (
             },
             tooltip: {
                 enabled: false,
+                position: 'nearest',
                 external: createTooltip(setTooltip),
             },
         },
         locale: locationSettings.locale,
         interaction: {
-            intersect: localTooltip || false,
+            intersect: false,
             axis: 'x',
+            mode: 'index',
         },
         elements: {
             point: {

frontend/src/component/executiveDashboard/components/Widget/Widget.tsx

@@ -3,6 +3,7 @@ import { Paper, Typography, styled, SxProps } from '@mui/material';
 import { HelpIcon } from 'component/common/HelpIcon/HelpIcon';
 import { ConditionallyRender } from 'component/common/ConditionallyRender/ConditionallyRender';
 import { Theme } from '@mui/material/styles/createTheme';
+import InfoOutlined from '@mui/icons-material/InfoOutlined';
 
 const StyledPaper = styled(Paper)(({ theme }) => ({
     padding: theme.spacing(3),
@@ -29,7 +30,11 @@ export const Widget: FC<{
             {title}
             <ConditionallyRender
                 condition={Boolean(tooltip)}
-                show={<HelpIcon htmlTooltip tooltip={tooltip} />}
+                show={
+                    <HelpIcon htmlTooltip tooltip={tooltip}>
+                        <InfoOutlined />
+                    </HelpIcon>
+                }
             />
         </Typography>
         {children}

frontend/src/component/executiveDashboard/componentsStat/HealthStats/HealthStats.tsx

@@ -73,7 +73,7 @@ export const HealthStats: VFC<IHealthStatsProps> = ({
                 x={206}
                 y={72}
                 fill={theme.palette.charts.health.text}
-                fontSize={12}
+                fontSize={13}
                 textAnchor='middle'
             >
                 Healthy
@@ -100,7 +100,7 @@ export const HealthStats: VFC<IHealthStatsProps> = ({
                 x={53}
                 y={81}
                 fill={theme.palette.charts.health.text}
-                fontSize={12}
+                fontSize={13}
                 textAnchor='middle'
             >
                 Stale
@@ -127,7 +127,7 @@ export const HealthStats: VFC<IHealthStatsProps> = ({
                 x={144}
                 y={232}
                 fill={theme.palette.charts.health.text}
-                fontSize={12}
+                fontSize={13}
                 textAnchor='middle'
             >
                 <tspan x={144} dy='0'>

frontend/src/themes/theme.ts

@@ -283,7 +283,7 @@ export const theme = {
                 title: colors.grey[50],
                 healthy: colors.purple[800],
                 stale: colors.red[800],
-                potentiallyStale: colors.orange[800],
+                potentiallyStale: colors.orange[900],
                 gradientStale: colors.red[300],
                 gradientPotentiallyStale: colors.orange[500],
             },