feat: UI polish - dark default, version drift vs default release, humanized enums, failed-jobs layout, processing button hierarchy, PT-BR titles/CTAs

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>

central/app/control_api.py

@@ -7,6 +7,7 @@ from sqlalchemy import select
 
 from .audit import record_audit
 from .blocker_resolution import BlockerResolutionUnavailable, resolve_blocker_with_context
+from .installation_identity import reference_agent_version
 from .control_plane import dashboard_summary, installation_view, list_blockers, list_installations, list_jobs, list_panel_events
 from .human_auth import require_csrf, require_human
 from .models import Agent, AgentSnapshot, BlockedProduct, Installation, Job, Tenant
@@ -46,7 +47,7 @@ def router(session_factory):
         session, _, _ = identity
         try:
             installation, agent, tenant, snapshot = get_installation(session, agent_id)
-            return installation_view(installation, agent, tenant, snapshot)
+            return installation_view(installation, agent, tenant, snapshot, reference=reference_agent_version(session))
         finally: session.close()
 
     @routes.get("/agents/{agent_id}/health")