fix(web): no broken Dashboard nav path for delegated-only MSP users [Phase 3b follow-up]

Addresses a Codex finding: Phase 3b made delegated-only MSP users non-regular (so
they get the group nav), which also rendered the Dashboard link for them — but
/dashboard classifies the same user as regular and bounced them to /progress. So
clicking Dashboard sent an MSP admin to the end-user progress portal.

Fixed on both ends:
- GlobalSidebar: gate the Dashboard link on isAdminOrOperator || hasGlobalScope
  (genuine own-tenant/platform users), not merely !isRegularUser. A delegated-only
  admin has no own-tenant stake, so the link is hidden; their entry point is the
  Fleet group.
- /dashboard: a delegated-only user who reaches it by deep link now redirects to
  /fleet instead of /progress, consistent with the AuthGate landing.

Web tsc clean; 476 web tests green.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

src/Web/autopilot-monitor-web/app/dashboard/page.tsx

@@ -144,11 +144,12 @@ function HomeContent() {
     disabled: isRegularUser,
   });
 
-  // Redirect regular users (non-admin, non-operator, no platform scope) to the progress portal — they
-  // must never see the session list. A read-only Global Reader has cross-tenant read scope → stays.
+  // Redirect users without own-tenant/platform scope away from the session list. A delegated ("MSP") admin
+  // manages OTHER tenants and belongs on the fleet overview, not the end-user progress portal; everyone else
+  // without scope goes to /progress. A read-only Global Reader has cross-tenant read scope → stays.
   useEffect(() => {
     if (user && !user.isTenantAdmin && !user.isGlobalAdmin && !user.isGlobalReader && user.role !== 'Operator') {
-      router.replace("/progress");
+      router.replace(user.isDelegated ? "/fleet" : "/progress");
     }
   }, [user, router]);
 

src/Web/autopilot-monitor-web/components/GlobalSidebar.tsx

@@ -399,14 +399,18 @@ export function GlobalSidebar({ children }: { children: ReactNode }) {
   // Regular users see minimal nav. A read-only Global Reader has platform scope, and a delegated MSP admin
   // has fleet scope → both get the (group-filtered) nav rather than the minimal regular-user list.
   const isRegularUser = !isAdminOrOperator && !hasFleetScope;
+  // The Dashboard (own-tenant session list) is only meaningful for a genuine own-tenant/platform user.
+  // A delegated-only MSP admin has no own-tenant stake — /dashboard would just bounce them to /fleet —
+  // so hide the link for them; their entry point is the Fleet group.
+  const showDashboard = isAdminOrOperator || hasGlobalScope;
 
   const renderNavContent = (isMobile = false) => (
     <>
       {/* Global nav — only when authenticated */}
       {isAuthenticated && (
         <>
-          {/* Dashboard — hidden for regular users (no admin/operator access) */}
-          {!isRegularUser && (
+          {/* Dashboard — own-tenant session list; hidden for regular users AND delegated-only MSP admins */}
+          {showDashboard && (
             <ul className="space-y-0.5">
               {renderGlobalItem(DASHBOARD_ITEM)}
             </ul>