feat(ui): enhance navigation sidebar visuals and tooltips

Update navigation components to improve sidebar usability and layout.
- Reformat stalker-shell navigation binding to align attributes consistently.
- Add matTooltip and matTooltipPosition to portal icon and nav items to
  surface portal status and item labels on hover.
 Rework navigation markup to use mat-nav-list, add home shortcut and dividers,
  and hide several textual labels/actions by commenting them out to create a
  more compact icon-only sidebar while preserving code for future restore.
- Collapse unused portal info/actions and library labels into comments to
  simplify DOM while keeping structure for reactivation.

These changes make the left navigation more compact, provide quick hover
context via tooltips, and prepare the UI for a condensed icon-driven layout.

apps/web/src/app/stalker/stalker-shell/stalker-shell.component.html

@@ -3,8 +3,8 @@
         class="navigation-sidebar"
         [navigationItems]="mainNavigationItems"
         (categoryClick)="setContentType($any($event))"
-        [selectedContentType]="stalkerStore.selectedContentType()"
         (pageClicked)="handlePageClick()"
+        [selectedContentType]="stalkerStore.selectedContentType()"
     />
     <router-outlet />
 </div>