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, 16 insertions, 3 deletions

diff --git a/src/zencore/sentryintegration.cpp b/src/zencore/sentryintegration.cpp
index e39b8438d..8d087e8c6 100644
--- a/src/zencore/sentryintegration.cpp
+++ b/src/zencore/sentryintegration.cpp
@@ -128,6 +128,8 @@ namespace zen {
 #	if ZEN_USE_SENTRY
 ZEN_DEFINE_LOG_CATEGORY_STATIC(LogSentry, "sentry-sdk");
 
+static std::atomic<bool> s_SentryLogEnabled{true};
+
 static void
 SentryLogFunction(sentry_level_t Level, const char* Message, va_list Args, [[maybe_unused]] void* Userdata)
 {
@@ -147,14 +149,15 @@ SentryLogFunction(sentry_level_t Level, const char* Message, va_list Args, [[may
 	}
 
 	// SentryLogFunction can be called before the logging system is initialized
-	// (during sentry_init which runs before InitializeLogging). Fall back to
-	// console logging when the category logger is not yet available.
+	// (during sentry_init which runs before InitializeLogging), or after it has
+	// been shut down (during sentry_close on a background worker thread). Fall
+	// back to console logging when the category logger is not available.
 	//
 	// Since we want to default to WARN level but this runs before logging has
 	// been configured, we ignore the callbacks for DEBUG/INFO explicitly here
 	// which means users don't see every possible log message if they're trying
 	// to configure the levels using --log-debug=sentry-sdk
-	if (!TheDefaultLogger)
+	if (!TheDefaultLogger || !s_SentryLogEnabled.load(std::memory_order_acquire))
 	{
 		switch (Level)
 		{
@@ -212,11 +215,21 @@ SentryIntegration::SentryIntegration()
 
 SentryIntegration::~SentryIntegration()
 {
+	Close();
+}
+
+void
+SentryIntegration::Close()
+{
 	if (m_IsInitialized && m_SentryErrorCode == 0)
 	{
 		logging::SetErrorLog("");
 		m_SentryAssert.reset();
+		// Disable spdlog forwarding before sentry_close() since its background
+		// worker thread may still log during shutdown via SentryLogFunction
+		s_SentryLogEnabled.store(false, std::memory_order_release);
 		sentry_close();
+		m_IsInitialized = false;
 	}
 }