Implement new nav hierarchy for stateful/cloud (elastic#192805)

<strike>Depends on elastic#193526,
WON'T FIX</strike>

Fixes elastic#192803
Fixes elastic#191509

This PR updates the nav hierarchy for stateful/cloud and changes the
`accordion` to `panelOpener`. The menu items have been updated according
to the Figma file and the discussions happening in this
[issue](elastic#192050). I took a video
below of how the new navigation looks like with the new changes

https://github.com/user-attachments/assets/e73c8dd9-b674-4146-bcde-443490569502

## What was changed
- AI & ML menu is removed and split into
  - `AI Assistant`
- `Machine learning`: this menu was already present in the footer, it
was moved in the body (after Infrastucture)
- `Applications` now opens a `panelOpener` instead of an `accordion`
  - Synthetics was moved to a new section
  - “User Experience” was renamed to “User experience”
- `Infrastucture` now opens a `panelOpener` instead of an `accordion`
  - Universal Profiling was moved to a separate section below
  - Metrics Explorer was renamed to Metrics explorer
- `Machine learning` now opens a `panelOpener` instead of an `accordion`
- `Supplied Configurations` was added under the Machine learning >
Anomaly Detection section.
- The machine learning `link:
'securitySolutionUI:machine_learning-landing'` was completely removed.
Clicking on the `Machine learning` link will slide out the panel instead
(same behavior with clicking on the icon). More details about why I
removed this
[here](elastic#192805 (comment))
  - Use sentence/case for the menu items
- `Other tools` now opens a `panelOpener` instead of an `accordion`
  - Logs anomalies was added here
  - Logs categories was added here
  - Visualize library was added
- Clicking on the 1st level menu items (Applications, Infrastructure,
Machine learning, Other tools) toggles the panel on the right
(arrowRight).
- The icon was changed from the four small squares to the right-facing
caret
- The sub-nav menu slides out to the right whenever the label OR the
icon are clicked
- `Getting started` in the footer was renamed to `Add data`
- `Data Set Quality` was added under `Stack Management > Data` section
below `Index Management`

## Functional Tests
Some tests have been added that test:
- toggling of the panel when clicking on the link button
- `AI assistant` changes
- `Infrastructure` changes
- `Other Tools` changes
- `Machine Learning` changes

## What this PR doesn't do
I faced some issues with the footer, so footer will be separately
handled in this [issue](elastic#192865)

---------

Co-authored-by: Elastic Machine <[email protected]>
Co-authored-by: Sébastien Loix <[email protected]>
Co-authored-by: kibanamachine <[email protected]>
Co-authored-by: Dominique Clarke <[email protected]>
(cherry picked from commit ab71509)

packages/core/chrome/core-chrome-browser-internal/src/project_navigation/utils.ts

@@ -274,11 +274,6 @@ function validateNodeProps<
       `[Chrome navigation] Error in node [${id}]. Only one of "href" or "cloudLink" can be provided.`
     );
   }
-  if (renderAs === 'panelOpener' && !link) {
-    throw new Error(
-      `[Chrome navigation] Error in node [${id}]. If renderAs is set to "panelOpener", a "link" must also be provided.`
-    );
-  }
   if (renderAs === 'item' && !link && !onClick) {
     throw new Error(
       `[Chrome navigation] Error in node [${id}]. If renderAs is set to "item", a "link" or "onClick" must also be provided.`

packages/shared-ux/chrome/navigation/src/ui/components/navigation_item_open_panel.tsx

@@ -61,6 +61,7 @@ export const NavigationItemOpenPanel: FC<Props> = ({ item, navigateToUrl, active
   const isNotMobile = useIsWithinMinBreakpoint('s');
   const isIconVisible = isNotMobile && !isSideNavCollapsed && !!children && children.length > 0;
   const isActive = isActiveFromUrl(item.path, activeNodes);
+  const hasLandingPage = Boolean(href);
 
   const itemClassNames = classNames(
     'sideNavItem',
@@ -73,30 +74,36 @@ export const NavigationItemOpenPanel: FC<Props> = ({ item, navigateToUrl, active
     [`nav-item-id-${id}`]: id,
     [`nav-item-isActive`]: isActive,
   });
+
   const buttonDataTestSubj = classNames(`panelOpener`, `panelOpener-${path}`, {
     [`panelOpener-id-${id}`]: id,
     [`panelOpener-deepLinkId-${deepLink?.id}`]: !!deepLink,
   });
 
+  const togglePanel = useCallback(() => {
+    if (selectedNode?.id === item.id) {
+      closePanel();
+    } else {
+      openPanel(item);
+    }
+  }, [selectedNode?.id, item, closePanel, openPanel]);
+
   const onLinkClick = useCallback(
     (e: React.MouseEvent) => {
       if (!href) {
+        togglePanel();
         return;
       }
       e.preventDefault();
       navigateToUrl(href);
       closePanel();
     },
-    [closePanel, href, navigateToUrl]
+    [closePanel, href, navigateToUrl, togglePanel]
   );
 
   const onIconClick = useCallback(() => {
-    if (selectedNode?.id === item.id) {
-      closePanel();
-    } else {
-      openPanel(item);
-    }
-  }, [openPanel, closePanel, item, selectedNode]);
+    togglePanel();
+  }, [togglePanel]);
 
   const isExpanded = selectedNode?.path === path;
 
@@ -123,7 +130,7 @@ export const NavigationItemOpenPanel: FC<Props> = ({ item, navigateToUrl, active
             size="s"
             color="text"
             onClick={onIconClick}
-            iconType="spaces"
+            iconType={hasLandingPage ? 'spaces' : 'arrowRight'}
             iconSize="m"
             aria-label={i18n.translate('sharedUXPackages.chrome.sideNavigation.togglePanel', {
               defaultMessage: 'Toggle "{title}" panel navigation',

packages/shared-ux/chrome/navigation/src/ui/components/panel/navigation_panel.tsx

@@ -32,6 +32,12 @@ const getTestSubj = (selectedNode: PanelSelectedNode | null): string | undefined
   });
 };
 
+const getTargetTestSubj = (target: EventTarget | null): string | undefined => {
+  if (!target) return;
+
+  return (target as HTMLElement).dataset.testSubj;
+};
+
 export const NavigationPanel: FC = () => {
   const { euiTheme } = useEuiTheme();
   const { isOpen, close, getContent, selectedNode } = usePanel();
@@ -48,12 +54,22 @@ export const NavigationPanel: FC = () => {
 
   const onOutsideClick = useCallback(
     ({ target }: Event) => {
-      // Only close if we are not clicking on the currently selected nav node
-      if (
-        !(target as HTMLButtonElement).dataset.testSubj?.includes(
-          `panelOpener-${selectedNode?.path}`
-        )
-      ) {
+      let doClose = true;
+
+      if (target) {
+        // Only close if we are not clicking on the currently selected nav node
+        const testSubj =
+          getTargetTestSubj(target) ?? getTargetTestSubj((target as HTMLElement).parentNode);
+
+        if (
+          testSubj?.includes(`nav-item-${selectedNode?.path}`) ||
+          testSubj?.includes(`panelOpener-${selectedNode?.path}`)
+        ) {
+          doClose = false;
+        }
+      }
+
+      if (doClose) {
         close();
       }
     },

test/functional/page_objects/solution_navigation.ts

@@ -59,14 +59,22 @@ export function SolutionNavigationProvider(ctx: Pick<FtrProviderContext, 'getSer
     // side nav related actions
     sidenav: {
       async expectLinkExists(
-        by: { deepLinkId: AppDeepLinkId } | { navId: string } | { text: string }
+        by:
+          | { deepLinkId: AppDeepLinkId }
+          | { navId: string }
+          | { text: string }
+          | { panelNavLinkId: string }
       ) {
         if ('deepLinkId' in by) {
           await testSubjects.existOrFail(`~nav-item-deepLinkId-${by.deepLinkId}`, {
             timeout: TIMEOUT_CHECK,
           });
         } else if ('navId' in by) {
           await testSubjects.existOrFail(`~nav-item-id-${by.navId}`, { timeout: TIMEOUT_CHECK });
+        } else if ('panelNavLinkId' in by) {
+          await testSubjects.existOrFail(`~panelNavItem-id-${by.panelNavLinkId}`, {
+            timeout: TIMEOUT_CHECK,
+          });
         } else {
           expect(await getByVisibleText('~nav-item', by.text)).not.be(null);
         }
@@ -130,6 +138,9 @@ export function SolutionNavigationProvider(ctx: Pick<FtrProviderContext, 'getSer
           });
         }
       },
+      async clickPanelLink(deepLinkId: string) {
+        await testSubjects.click(`~panelNavItem-id-${deepLinkId}`);
+      },
       async expectSectionExists(sectionId: NavigationId) {
         log.debug('SolutionNavigation.sidenav.expectSectionExists', sectionId);
         await testSubjects.existOrFail(getSectionIdTestSubj(sectionId), { timeout: TIMEOUT_CHECK });
@@ -186,14 +197,33 @@ export function SolutionNavigationProvider(ctx: Pick<FtrProviderContext, 'getSer
           return false;
         }
       },
-      async openPanel(sectionId: NavigationId) {
+      async openPanel(
+        sectionId: NavigationId,
+        { button }: { button: 'icon' | 'link' } = { button: 'icon' }
+      ) {
         log.debug('SolutionNavigation.sidenav.openPanel', sectionId);
 
         const isOpen = await this.isPanelOpen(sectionId);
         if (isOpen) return;
 
         const panelOpenerBtn = await testSubjects.find(
-          `~panelOpener-id-${sectionId}`,
+          button === 'icon' ? `~panelOpener-id-${sectionId}` : `~nav-item-id-${sectionId}`,
+          TIMEOUT_CHECK
+        );
+
+        await panelOpenerBtn.click();
+      },
+      async closePanel(
+        sectionId: NavigationId,
+        { button }: { button: 'icon' | 'link' } = { button: 'icon' }
+      ) {
+        log.debug('SolutionNavigation.sidenav.closePanel', sectionId);
+
+        const isOpen = await this.isPanelOpen(sectionId);
+        if (!isOpen) return;
+
+        const panelOpenerBtn = await testSubjects.find(
+          button === 'icon' ? `~panelOpener-id-${sectionId}` : `~nav-item-id-${sectionId}`,
           TIMEOUT_CHECK
         );