c2801c4113
Drops the entire ChatTwo/Http/ tree (ServerCore, HostContext, RouteController, Processing, SSEConnection, the message protocol DTOs and the bundled Svelte frontend) plus WebinterfaceUtil. Also removes every ServerCore.Send* call site that fed the SSE stream: - MessageManager.ProcessMessage no longer broadcasts new messages - Chat.cs no longer notifies on login - PayloadHandler no longer rebroadcasts on screenshot-mode toggle - ChatLogWindow no longer announces tab and channel switches The Plugin class drops the ServerCore field, the auto-start branch and the Dispose hook. The DbViewer still imported a stale namespace from the message protocol; the using is removed. Language.resx and its generated Designer file keep the Webinterface string keys for now so future upstream cherry-picks do not break on missing resources. They are dead code from our perspective but harmless.