compute orchestration (#763)

- Added local process runners for Linux/Wine, Mac with some sandboxing support
- Horde & Nomad provisioning for development and testing
- Client session queues with lifecycle management (active/draining/cancelled), automatic retry with configurable limits, and manual reschedule API
- Improved web UI for orchestrator, compute, and hub dashboards with WebSocket push updates
- Some security hardening
- Improved scalability and `zen exec` command

Still experimental - compute support is disabled by default

3 files changed, 12 insertions, 3 deletions

diff --git a/src/zenserver/hub/hubservice.cpp b/src/zenserver/hub/hubservice.cpp
index bf0e294c5..a757cd594 100644
--- a/src/zenserver/hub/hubservice.cpp
+++ b/src/zenserver/hub/hubservice.cpp
@@ -845,7 +845,7 @@ HttpHubService::HttpHubService(std::filesystem::path HubBaseDir, std::filesystem
 			Obj << "currentInstanceCount" << m_Impl->GetInstanceCount();
 			Obj << "maxInstanceCount" << m_Impl->GetMaxInstanceCount();
 			Obj << "instanceLimit" << m_Impl->GetInstanceLimit();
-			Req.ServerRequest().WriteResponse(HttpResponseCode::OK);
+			Req.ServerRequest().WriteResponse(HttpResponseCode::OK, Obj.Save());
 		},
 		HttpVerb::kGet);
 }
diff --git a/src/zenserver/hub/zenhubserver.cpp b/src/zenserver/hub/zenhubserver.cpp
index d0a0db417..c63c618df 100644
--- a/src/zenserver/hub/zenhubserver.cpp
+++ b/src/zenserver/hub/zenhubserver.cpp
@@ -143,6 +143,8 @@ ZenHubServer::InitializeServices(const ZenHubServerConfig& ServerConfig)
 	ZEN_INFO("instantiating hub service");
 	m_HubService = std::make_unique<HttpHubService>(ServerConfig.DataDir / "hub", ServerConfig.DataDir / "servers");
 	m_HubService->SetNotificationEndpoint(ServerConfig.UpstreamNotificationEndpoint, ServerConfig.InstanceId);
+
+	m_FrontendService = std::make_unique<HttpFrontendService>(m_ContentRoot, m_StatusService);
 }
 
 void
@@ -159,6 +161,11 @@ ZenHubServer::RegisterServices(const ZenHubServerConfig& ServerConfig)
 	{
 		m_Http->RegisterService(*m_ApiService);
 	}
+
+	if (m_FrontendService)
+	{
+		m_Http->RegisterService(*m_FrontendService);
+	}
 }
 
 void
diff --git a/src/zenserver/hub/zenhubserver.h b/src/zenserver/hub/zenhubserver.h
index ac14362f0..4c56fdce5 100644
--- a/src/zenserver/hub/zenhubserver.h
+++ b/src/zenserver/hub/zenhubserver.h
@@ -2,6 +2,7 @@
 
 #pragma once
 
+#include "frontend/frontend.h"
 #include "zenserver.h"
 
 namespace cxxopts {
@@ -81,8 +82,9 @@ private:
 	std::filesystem::path m_ContentRoot;
 	bool				  m_DebugOptionForcedCrash = false;
 
-	std::unique_ptr<HttpHubService> m_HubService;
-	std::unique_ptr<HttpApiService> m_ApiService;
+	std::unique_ptr<HttpHubService>		 m_HubService;
+	std::unique_ptr<HttpApiService>		 m_ApiService;
+	std::unique_ptr<HttpFrontendService> m_FrontendService;
 
 	void InitializeState(const ZenHubServerConfig& ServerConfig);
 	void InitializeServices(const ZenHubServerConfig& ServerConfig);