feat(ui): add Classic, Smart, and Compact desktop navigation styles (#1642)

* feat(ui): add Classic, Smart, and Compact desktop navigation styles

Introduce a shared app-nav registry and reachable model so TopBar, the
command palette, and mobile menus share one destination source. Smart bar
is the default; Appearance gains a Navigation subsection with quick links.

* fix(e2e): stop clearing top-nav prefs on every reload

The desktop-navigation suite used addInitScript to wipe mode storage,
which re-ran on reload and undid the classic/compact values under test.

* fix(ui): harden nav PR docs and Compact quick-link coverage

Drop the partial docs-refresh import that left missing image assets and a stale Display screenshot, keep navigation-scoped operator docs against main, and add an E2E path that proves Compact quick-link add, persist, and render after reload.

* fix(ui): polish Compact quick links and menu mastheads

Align Smart/Compact menus with Theme chrome, keep pin labels always visible, and drive add capacity from persisted pins (max five) with a trailing + picker and per-pin remove.

* test(e2e): exact-match Compact Networking pin locator

Avoid Playwright strict-mode clash with Actions for Networking.

* fix(ui): simplify Compact quick link removal and fix + button trailing

Remove the (...) dropdown per quick link in Compact mode. Right-click
context menu remains as the sole on-bar removal affordance. Fix the +
add-button to trail quick links rather than pinning to the far right
by removing flex-1 from the quick-link rail.

docs/getting-started/introduction.mdx

@@ -34,7 +34,7 @@ The **Home** view is the default landing page. It is designed for a fast operati
 - The activity panel shows **Fleet Heartbeat** when remote nodes exist, or **Stack Restarts (7d)** on a local-only install.
 - **Recent Alerts** shows the latest notification feed and includes **Clear All Notifications** when there is anything to clear.
 
-The top navigation strip starts with **Home**, **Fleet**, **Resources**, **Security**, and **App Store**. Additional operator views (**Logs**, **Update**, **Schedules**, **Console**, and **Audit**) appear based on your role and license tier. Fleet-wide views describe the control instance, so they are hidden while a remote node is active.
+The top navigation starts with **Home**, **Resources**, **Networking**, **Security**, and **App Store**. **Fleet** appears when your role can read nodes. Additional operator views (**Logs**, **Update**, **Schedules**, and **Audit**) appear based on your role and license tier. **Console** is a limited-availability operator surface documented on its own page when enabled on an instance. Fleet-wide views describe the control instance, so they are hidden while a remote node is active. Choose Classic, Smart, or Compact desktop navigation under **Settings → Appearance → Navigation**; phone navigation stays on its own layout.
 
 ## Stack workspace