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.

3 files changed, 7 insertions, 0 deletions

diff --git a/src/zencore/include/zencore/logging/tracesink.h b/src/zencore/include/zencore/logging/tracesink.h
index e63d838b4..785c51e10 100644
--- a/src/zencore/include/zencore/logging/tracesink.h
+++ b/src/zencore/include/zencore/logging/tracesink.h
@@ -6,6 +6,8 @@
 
 namespace zen::logging {
 
+#if ZEN_WITH_TRACE
+
 /**
  * A logging sink that forwards log messages to the trace system.
  *
@@ -20,4 +22,6 @@ public:
 	void SetFormatter(std::unique_ptr<Formatter> InFormatter) override;
 };
 
+#endif
+
 }  // namespace zen::logging
diff --git a/src/zencore/include/zencore/sentryintegration.h b/src/zencore/include/zencore/sentryintegration.h
index a4e33d69e..27e5a8a82 100644
--- a/src/zencore/include/zencore/sentryintegration.h
+++ b/src/zencore/include/zencore/sentryintegration.h
@@ -40,6 +40,7 @@ public:
 	};
 
 	void		Initialize(const Config& Conf, const std::string& CommandLine);
+	void		Close();
 	void		LogStartupInformation();
 	static void ClearCaches();
 
diff --git a/src/zencore/include/zencore/system.h b/src/zencore/include/zencore/system.h
index fecbe2dbe..a67999e52 100644
--- a/src/zencore/include/zencore/system.h
+++ b/src/zencore/include/zencore/system.h
@@ -14,6 +14,7 @@ class CbWriter;
 
 std::string		 GetMachineName();
 std::string_view GetOperatingSystemName();
+std::string		 GetOperatingSystemVersion();
 std::string_view GetRuntimePlatformName();	// "windows", "wine", "linux", or "macos"
 std::string_view GetCpuName();
 
@@ -28,6 +29,7 @@ struct SystemMetrics
 	uint64_t AvailVirtualMemoryMiB = 0;
 	uint64_t PageFileMiB		   = 0;
 	uint64_t AvailPageFileMiB	   = 0;
+	uint64_t UptimeSeconds		   = 0;
 };
 
 /// Extended metrics that include CPU usage percentage, which requires