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, 22 insertions, 1 deletions

diff --git a/src/zenhttp/servers/wshttpsys.cpp b/src/zenhttp/servers/wshttpsys.cpp
index 3408b64b3..af320172d 100644
--- a/src/zenhttp/servers/wshttpsys.cpp
+++ b/src/zenhttp/servers/wshttpsys.cpp
@@ -7,6 +7,7 @@
 #	include "wsframecodec.h"
 
 #	include <zencore/logging.h>
+#	include <zenhttp/httpserver.h>
 
 namespace zen {
 
@@ -19,11 +20,16 @@ WsHttpSysLog()
 
 //////////////////////////////////////////////////////////////////////////
 
-WsHttpSysConnection::WsHttpSysConnection(HANDLE RequestQueueHandle, HTTP_REQUEST_ID RequestId, IWebSocketHandler& Handler, PTP_IO Iocp)
+WsHttpSysConnection::WsHttpSysConnection(HANDLE				RequestQueueHandle,
+										 HTTP_REQUEST_ID	RequestId,
+										 IWebSocketHandler& Handler,
+										 PTP_IO				Iocp,
+										 HttpServer*		Server)
 : m_RequestQueueHandle(RequestQueueHandle)
 , m_RequestId(RequestId)
 , m_Handler(Handler)
 , m_Iocp(Iocp)
+, m_HttpServer(Server)
 , m_ReadBuffer(8192)
 {
 	m_ReadIoContext.ContextType	 = HttpSysIoContext::Type::kWebSocketRead;
@@ -40,6 +46,11 @@ WsHttpSysConnection::~WsHttpSysConnection()
 	{
 		Disconnect();
 	}
+
+	if (m_HttpServer)
+	{
+		m_HttpServer->OnWebSocketConnectionClosed();
+	}
 }
 
 void
@@ -174,6 +185,11 @@ WsHttpSysConnection::ProcessReceivedData()
 		// Remove consumed bytes
 		m_Accumulated.erase(m_Accumulated.begin(), m_Accumulated.begin() + Frame.BytesConsumed);
 
+		if (m_HttpServer)
+		{
+			m_HttpServer->OnWebSocketFrameReceived(Frame.BytesConsumed);
+		}
+
 		switch (Frame.Opcode)
 		{
 			case WebSocketOpcode::kText:
@@ -250,6 +266,11 @@ WsHttpSysConnection::ProcessReceivedData()
 void
 WsHttpSysConnection::EnqueueWrite(std::vector<uint8_t> Frame)
 {
+	if (m_HttpServer)
+	{
+		m_HttpServer->OnWebSocketFrameSent(Frame.size());
+	}
+
 	bool ShouldFlush = false;
 
 	{