Restyle server browser UI; hide overlay on join

Restyles the server browser to match main-menu/settings (Futura PT Demibold, amber/green palette, yellow selection bars, shared panel chrome), removes SVG border strips, and tweaks modal width/layout. Adds JS + C++ coordination so the custom main-menu overlay hides when a server join begins (C++ invokes onSessionLoading and calls HideMainMenu; CompleteJoinFailure restores the menu/browser). Controller glyph tint now derives from --co-amber. Updates changelog and dev-log; includes compiled Vault109 script update.

plugin/src/F4TServerBrowserBridge.cpp

@@ -212,10 +212,21 @@ namespace F4T::ServerBrowser
 			LogInfo(std::format(" Joined server '{}'.", a_entry.name));
 		}
 
+		void RestoreMainMenuAfterJoinFailure()
+		{
+			if (F4T::PrismaUI::IsMainMenuVisible()) {
+				return;
+			}
+
+			F4T::PrismaUI::ShowMainMenu();
+			F4T::PrismaUI::ShowServerBrowser();
+		}
+
 		void CompleteJoinFailure(const ServerEntry& a_entry, std::string_view a_reason)
 		{
 			F4T::Networking::DisconnectFromLocalServer();
 			PushConnectionStatusEvent();
+			RestoreMainMenuAfterJoinFailure();
 			DispatchEvent(nlohmann::json{
 				{ "type", "joinFailed" },
 				{ "serverId", a_entry.id },
@@ -259,6 +270,13 @@ namespace F4T::ServerBrowser
 				{ "message", "Loading game..." }
 			});
 
+			if (g_api && g_view != 0 && g_api->IsValid(g_view)) {
+				g_api->Invoke(g_view, "if(window.onSessionLoading){window.onSessionLoading();}");
+			}
+
+			// Hide the custom main menu overlay before the vanilla loading screen appears.
+			F4T::PrismaUI::HideMainMenu();
+
 			const auto* taskInterface = F4SE::GetTaskInterface();
 			if (!taskInterface) {
 				a_error = "Game task interface is unavailable.";