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, 7 insertions, 0 deletions

diff --git a/src/zenstore/projectstore.cpp b/src/zenstore/projectstore.cpp
index 1706c9105..03086b473 100644
--- a/src/zenstore/projectstore.cpp
+++ b/src/zenstore/projectstore.cpp
@@ -4712,6 +4712,13 @@ ProjectStore::GetProjectsList()
 		Response << "ProjectRootDir"sv << PathToUtf8(Prj.ProjectRootDir);
 		Response << "EngineRootDir"sv << PathToUtf8(Prj.EngineRootDir);
 		Response << "ProjectFilePath"sv << PathToUtf8(Prj.ProjectFilePath);
+
+		const auto AccessTime = Prj.LastOplogAccessTime(""sv);
+		if (AccessTime != GcClock::TimePoint::min())
+		{
+			Response << "LastAccessTime"sv << gsl::narrow<uint64_t>(AccessTime.time_since_epoch().count());
+		}
+
 		Response.EndObject();
 	});
 	Response.EndArray();