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, 12 insertions, 5 deletions

diff --git a/src/zenserver/zenserver.h b/src/zenserver/zenserver.h
index 5a8a079c0..c06093f0d 100644
--- a/src/zenserver/zenserver.h
+++ b/src/zenserver/zenserver.h
@@ -3,11 +3,13 @@
 #pragma once
 
 #include <zencore/basicfile.h>
+#include <zencore/system.h>
 #include <zenhttp/httpserver.h>
 #include <zenhttp/httpstats.h>
 #include <zenhttp/httpstatus.h>
 #include <zenutil/zenserverprocess.h>
 
+#include <atomic>
 #include <memory>
 #include <string_view>
 #include "config/config.h"
@@ -51,8 +53,10 @@ public:
 protected:
 	int	 Initialize(const ZenServerConfig& ServerOptions, ZenServerState::ZenServerEntry* ServerEntry);
 	void Finalize();
+	void ShutdownServices();
 	void GetBuildOptions(StringBuilderBase& OutOptions, char Separator = ',') const;
-	void LogSettingsSummary(const ZenServerConfig& ServerConfig);
+	static std::vector<std::pair<std::string_view, std::string>> BuildSettingsList(const ZenServerConfig& ServerConfig);
+	void														 LogSettingsSummary(const ZenServerConfig& ServerConfig);
 
 protected:
 	NamedMutex						m_ServerMutex;
@@ -73,9 +77,10 @@ protected:
 		kInitializing,
 		kRunning,
 		kShuttingDown
-	} m_CurrentState = kInitializing;
+	};
+	std::atomic<ServerState> m_CurrentState = kInitializing;
 
-	inline void				SetNewState(ServerState NewState) { m_CurrentState = NewState; }
+	inline void				SetNewState(ServerState NewState) { m_CurrentState.store(NewState, std::memory_order_relaxed); }
 	static std::string_view ToString(ServerState Value);
 
 	std::function<void()> m_IsReadyFunc;
@@ -88,8 +93,10 @@ protected:
 
 	std::unique_ptr<IHttpRequestFilter> m_HttpRequestFilter;
 
-	HttpHealthService m_HealthService;
-	HttpStatusService m_StatusService;
+	HttpHealthService	 m_HealthService;
+	HttpStatsService	 m_StatsService{m_IoContext};
+	HttpStatusService	 m_StatusService;
+	SystemMetricsTracker m_MetricsTracker;
 
 	// Stats reporting