Add unified hierarchical client management interface

app/ui/templates/components/partner_navigation_v2.html

@@ -1,4 +1,4 @@
-{% if navigation_render_location_v2|default('page') == 'global-host' or not global_role_navigation_host_v2|default(false) %}
+{% if navigation_render_location_v2|default('page') == 'global-host' or not global_role_navigation_host_v2|default(false) %}
 {#
   Partner operations navigation.
   Presentation only: all links use existing production routes and route-level permissions remain authoritative.
@@ -62,6 +62,11 @@
         'url': '/partner/clients',
         'active': _partner_path.startswith('/partner/clients')
       },
+      {
+        'label': 'Client Management',
+        'url': '/clients/management',
+        'active': _partner_path.startswith('/clients/management')
+      },
       {
         'label': 'Add Client',
         'url': '/clients/new',