feat: web dashboard and playground work

The NexusDashboard-parity dashboard (dDashboardServer) and everything built on it on the experimental branch:
accounts, characters, properties and moderation tools, permissions shared with in-game slash commands, economy
reports, World 3D and property 3D views with client scenery, scheduled events (features, vanity changes, live
events, announcements, restarts), vanity files and events, the CDClient browser, the message inspector with saved
captures, chat filter tools, community challenges, live ops, the AI moderator helper, and the server-side changes
they need.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

dDashboardServer/auth/AuthMiddleware.h

@@ -0,0 +1,28 @@
+#ifndef __AUTHMIDDLEWARE_H__
+#define __AUTHMIDDLEWARE_H__
+
+#include <string>
+#include <memory>
+#include "IHTTPMiddleware.h"
+
+/**
+ * AuthMiddleware: Extracts and verifies authentication tokens
+ * 
+ * Token extraction sources (in priority order):
+ * 1. Query parameter: ?token=eyJhbGc...
+ * 2. Cookie: dashboardToken=...
+ * 3. Authorization header: Bearer <token> or Token <token>
+ * 
+ * Sets HTTPContext.isAuthenticated, HTTPContext.authenticatedUser,
+ * and HTTPContext.gmLevel if token is valid.
+ */
+class AuthMiddleware final : public IHTTPMiddleware {
+public:
+	AuthMiddleware() = default;
+	~AuthMiddleware() override = default;
+
+	bool Process(HTTPContext& context, HTTPReply& reply) override;
+	std::string GetName() const override { return "AuthMiddleware"; }
+};
+
+#endif // !__AUTHMIDDLEWARE_H__