Fix: shared-host respawn block and web login brand placeholder

Two unrelated fixes bundled here.

1. Client respawn (ClientDll.cpp EasyRun/Run, test.cpp Run): after a host
   is shared or transferred to another server, restarting the master
   (server A) left the host's main instance stuck, because the respawn
   loop waited on IsStoped() (g_bThreadExit && GetCount()==0), which never
   becomes true while a still-alive shared instance holds AddCount(1).
   S_SERVER_EXIT now triggers an immediate reconnect without waiting for
   shared instances; client-exit / update still waits for all instances to
   drain. Verified by 100 restart cycles.

2. Web login page (WebService.cpp): the MFC web server only substituted
   __BASE_PATH__ in index.html and left __BRAND_NAME__ as a literal token
   in the login page title/heading. Substitute it with "SimpleRemoter" to
   match the original branding and the Go server's default.

Co-Authored-By: deepseek-v4-pro

client/test.cpp

@@ -495,8 +495,12 @@ BOOL Run(const char* argv1, int argv2, const std::string &runCmd)
         }
         do {
             run(ip, port);
-            while (bStop && !bStop() && 0 == status)
-                Sleep(20);
+            if (bExit && bExit() != S_SERVER_EXIT) {
+                // 受控端退出 / 程序更新：等所有实例（含分享实例）退干净，避免下方 FreeLibrary
+                // 卸载 DLL 时残留分享实例线程。主控端重启（S_SERVER_EXIT）则立即重连，不等仍存活的分享实例。
+                while (bStop && !bStop() && 0 == status)
+                    Sleep(20);
+            }
         } while (bExit && !bExit() && 0 == status);
 
         while (bStop && !bStop() && 1 == status)