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, 9 insertions, 3 deletions

diff --git a/src/zenserver/storage/projectstore/httpprojectstore.cpp b/src/zenserver/storage/projectstore/httpprojectstore.cpp
index 0ec6faea3..3631ee1c5 100644
--- a/src/zenserver/storage/projectstore/httpprojectstore.cpp
+++ b/src/zenserver/storage/projectstore/httpprojectstore.cpp
@@ -831,8 +831,8 @@ HttpProjectService::HandleRequest(HttpServerRequest& Request)
 	}
 }
 
-void
-HttpProjectService::HandleStatsRequest(HttpServerRequest& HttpReq)
+CbObject
+HttpProjectService::CollectStats()
 {
 	ZEN_TRACE_CPU("ProjectService::Stats");
 
@@ -898,7 +898,13 @@ HttpProjectService::HandleStatsRequest(HttpServerRequest& HttpReq)
 	}
 	Cbo.EndObject();
 
-	return HttpReq.WriteResponse(HttpResponseCode::OK, Cbo.Save());
+	return Cbo.Save();
+}
+
+void
+HttpProjectService::HandleStatsRequest(HttpServerRequest& HttpReq)
+{
+	HttpReq.WriteResponse(HttpResponseCode::OK, CollectStats());
 }
 
 void