feat(org): add create organization dialog and fix admin role check

- Add CreateOrgDialog component with name/slug form and auto-slug generation
- Add "New Organisation" button in TopBar org dropdown (limited to 10 orgs)
- Fix admin check in AppSidebar to use currently selected org role
  instead of global isOrgAdmin flag for proper org-scoped permissions

src/components/navigation/AppSidebar.tsx

@@ -22,6 +22,7 @@ import {
 import { SecuirdLogo } from "@/components/branding/SecuirdLogo";
 import { NavLink } from "@/components/NavLink";
 import { useAuth } from "@/contexts/AuthContext";
+import { useOrg } from "@/contexts/OrgContext";
 import {
   Sidebar,
   SidebarContent,
@@ -78,7 +79,11 @@ export function AppSidebar() {
   const { state } = useSidebar();
   const collapsed = state === "collapsed";
   const location = useLocation();
-  const { isOrgAdmin, isOrgMember, canViewSystemLogs } = useAuth();
+  const { isOrgMember, canViewSystemLogs } = useAuth();
+  const { selectedOrg } = useOrg();
+
+  // Check if user is admin/owner of the CURRENTLY SELECTED org (not just any org)
+  const isCurrentOrgAdmin = selectedOrg?.role === "owner" || selectedOrg?.role === "admin";
 
   const isActive = (path: string) => location.pathname === path;
   const isOrgActive = orgAdminNavItems.some((item) => isActive(item.url)) || adminNavItems.some((item) => isActive(item.url));
@@ -149,7 +154,7 @@ export function AppSidebar() {
           )}
           <SidebarGroupContent>
             <SidebarMenu>
-              {(isOrgAdmin ? orgAdminNavItems : orgMemberNavItems).map((item) => (
+              {(isCurrentOrgAdmin ? orgAdminNavItems : orgMemberNavItems).map((item) => (
                 <SidebarMenuItem key={item.title}>
                   <SidebarMenuButton asChild>
                     <NavLink
@@ -175,8 +180,8 @@ export function AppSidebar() {
         </SidebarGroup>
         )}
 
-        {/* Admin Section — only visible to org admins/owners */}
-        {isOrgAdmin && (
+        {/* Admin Section — only visible to org admins/owners of the CURRENT org */}
+        {isCurrentOrgAdmin && (
         <SidebarGroup className="mt-4">
           {!collapsed && (
             <SidebarGroupLabel className="px-4 text-xs font-medium text-sidebar-muted uppercase tracking-wider">

src/components/navigation/TopBar.tsx

@@ -1,5 +1,7 @@
+import { useState } from "react";
 import { useNavigate } from "react-router-dom";
-import { Menu, ChevronDown, LogOut, User, Shield, Building2, Loader2 } from "lucide-react";
+import { useQueryClient } from "@tanstack/react-query";
+import { Menu, ChevronDown, LogOut, User, Shield, Building2, Loader2, Plus } from "lucide-react";
 import { Button } from "@/components/ui/button";
 import { SidebarTrigger } from "@/components/ui/sidebar";
 import {
@@ -15,15 +17,20 @@ import { useAuth } from "@/contexts/AuthContext";
 import { useOrg } from "@/contexts/OrgContext";
 import { useOrganizations } from "@/hooks/useOrganizations";
 import { ComplianceBanner } from "@/components/auth/ComplianceBanner";
+import { CreateOrgDialog } from "@/components/org/CreateOrgDialog";
 
 export function TopBar() {
   const navigate = useNavigate();
   const { user, mfaCompliance, logout } = useAuth();
   const { selectedOrg, selectOrg } = useOrg();
+  const queryClient = useQueryClient();
 
   // Use React Query hook for organizations with automatic caching and deduplication
   const { data: organizations = [], isLoading: orgsLoading } = useOrganizations();
 
+  // New org dialog state
+  const [createOrgOpen, setCreateOrgOpen] = useState(false);
+
   // Ensure organizations is always an array (defensive check)
   const organizationsArray = Array.isArray(organizations) ? organizations : [];
 
@@ -93,6 +100,19 @@ export function TopBar() {
                   </DropdownMenuItem>
                 ))
               )}
+              {/* New Organisation button - only show when under 10 orgs */}
+              {organizationsArray.length < 10 && (
+                <>
+                  <DropdownMenuSeparator />
+                  <DropdownMenuItem
+                    onClick={() => setCreateOrgOpen(true)}
+                    className="flex items-center gap-2 text-primary cursor-pointer"
+                  >
+                    <Plus className="w-4 h-4" />
+                    New Organisation
+                  </DropdownMenuItem>
+                </>
+              )}
             </DropdownMenuContent>
           </DropdownMenu>
 
@@ -136,6 +156,18 @@ export function TopBar() {
           </DropdownMenu>
         </div>
       </div>
+
+      {/* Create Organisation Dialog - only render when user can create orgs */}
+      {organizationsArray.length < 10 && (
+        <CreateOrgDialog
+          open={createOrgOpen}
+          onOpenChange={setCreateOrgOpen}
+          onSuccess={(org) => {
+            queryClient.invalidateQueries({ queryKey: ['organizations'] });
+            selectOrg(org);
+          }}
+        />
+      )}
     </header>
   );
 }