Dashboard overhaul, compute integration (#814)

- **Frontend dashboard overhaul**: Unified compute/main dashboards into a single shared UI. Added new pages for cache, projects, metrics, sessions, info (build/runtime config, system stats). Added live-update via WebSockets with pause control, sortable detail tables, themed styling. Refactored compute/hub/orchestrator pages into modular JS.
- **HTTP server fixes and stats**: Fixed http.sys local-only fallback when default port is in use, implemented root endpoint redirect for http.sys, fixed Linux/Mac port reuse. Added /stats endpoint exposing HTTP server metrics (bytes transferred, request rates). Added WebSocket stats tracking.
- **OTEL/diagnostics hardening**: Improved OTLP HTTP exporter with better error handling and resilience. Extended diagnostics services configuration.
- **Session management**: Added new sessions service with HTTP endpoints for registering, updating, querying, and removing sessions. Includes session log file support. This is still WIP.
- **CLI subcommand support**: Added support for commands with subcommands in the zen CLI tool, with improved command dispatch.
- **Misc**: Exposed CPU usage/hostname to frontend, fixed JS compact binary float32/float64 decoding, limited projects displayed on front page to 25 sorted by last access, added vscode:// link support.

Also contains some fixes from TSAN analysis.

1 files changed, 15 insertions, 1 deletions

diff --git a/src/zenserver/storage/zenstorageserver.cpp b/src/zenserver/storage/zenstorageserver.cpp
index bca26e87a..af2c0dc81 100644
--- a/src/zenserver/storage/zenstorageserver.cpp
+++ b/src/zenserver/storage/zenstorageserver.cpp
@@ -33,6 +33,7 @@
 #include <zenutil/service.h>
 #include <zenutil/workerpools.h>
 #include <zenutil/zenserverprocess.h>
+#include "../sessions/sessions.h"
 
 #if ZEN_PLATFORM_WINDOWS
 #	include <zencore/windows.h>
@@ -133,7 +134,6 @@ void
 ZenStorageServer::RegisterServices()
 {
 	m_Http->RegisterService(*m_AuthService);
-	m_Http->RegisterService(m_StatsService);
 	m_Http->RegisterService(m_TestService);	 // NOTE: this is intentionally not limited to test mode as it's useful for diagnostics
 
 #if ZEN_WITH_TESTS
@@ -160,6 +160,11 @@ ZenStorageServer::RegisterServices()
 		m_Http->RegisterService(*m_HttpWorkspacesService);
 	}
 
+	if (m_HttpSessionsService)
+	{
+		m_Http->RegisterService(*m_HttpSessionsService);
+	}
+
 	m_FrontendService = std::make_unique<HttpFrontendService>(m_ContentRoot, m_StatusService);
 
 	if (m_FrontendService)
@@ -233,6 +238,11 @@ ZenStorageServer::InitializeServices(const ZenStorageServerConfig& ServerOptions
 									  *m_Workspaces));
 	}
 
+	{
+		m_SessionsService	  = std::make_unique<SessionsService>();
+		m_HttpSessionsService = std::make_unique<HttpSessionsService>(m_StatusService, m_StatsService, *m_SessionsService);
+	}
+
 	if (ServerOptions.BuildStoreConfig.Enabled)
 	{
 		CidStoreConfiguration BuildCidConfig;
@@ -823,6 +833,8 @@ ZenStorageServer::Cleanup()
 			m_IoRunner.join();
 		}
 
+		ShutdownServices();
+
 		if (m_Http)
 		{
 			m_Http->Close();
@@ -857,6 +869,8 @@ ZenStorageServer::Cleanup()
 		m_UpstreamCache.reset();
 		m_CacheStore = {};
 
+		m_HttpSessionsService.reset();
+		m_SessionsService.reset();
 		m_HttpWorkspacesService.reset();
 		m_Workspaces.reset();
 		m_HttpProjectService.reset();