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, 6 insertions, 5 deletions

diff --git a/src/zenserver/storage/cache/httpstructuredcache.h b/src/zenserver/storage/cache/httpstructuredcache.h
index 5a795c215..d462415d4 100644
--- a/src/zenserver/storage/cache/httpstructuredcache.h
+++ b/src/zenserver/storage/cache/httpstructuredcache.h
@@ -102,11 +102,12 @@ private:
 	void HandleRpcRequest(HttpServerRequest& Request, std::string_view UriNamespace);
 	void HandleDetailsRequest(HttpServerRequest& Request);
 
-	void		 HandleCacheRequest(HttpServerRequest& Request);
-	void		 HandleCacheNamespaceRequest(HttpServerRequest& Request, std::string_view Namespace);
-	void		 HandleCacheBucketRequest(HttpServerRequest& Request, std::string_view Namespace, std::string_view Bucket);
-	virtual void HandleStatsRequest(HttpServerRequest& Request) override;
-	virtual void HandleStatusRequest(HttpServerRequest& Request) override;
+	void			 HandleCacheRequest(HttpServerRequest& Request);
+	void			 HandleCacheNamespaceRequest(HttpServerRequest& Request, std::string_view Namespace);
+	void			 HandleCacheBucketRequest(HttpServerRequest& Request, std::string_view Namespace, std::string_view Bucket);
+	virtual CbObject CollectStats() override;
+	virtual void	 HandleStatsRequest(HttpServerRequest& Request) override;
+	virtual void	 HandleStatusRequest(HttpServerRequest& Request) override;
 
 	bool AreDiskWritesAllowed() const;