Feature: Migrate SimplePlugins privacy screen (隐私屏幕迁移)

Migrate the SimplePlugins privacy-screen (virtual desktop) feature into the
YAMA client as an "实验功能" right-click submenu entry. The capture layer is
rewritten rather than copied: CScreenHideSpy now subclasses YAMA's ::CScreenSpy
(vDesk=TRUE) so capture and encoding reuse YAMA's encoder pipeline instead of
SimplePlugins' diverged jpeg capture chain; CScreenManagerBase and
CScreenHideManager are migrated under the SimplePluginsScreenHide namespace,
and SimplePlugins-only ALGORITHM_DEFAULT is mapped to ALGORITHM_DIFF.

Add COMMAND_PRIVATE_SCREEN_PLUGIN (164) and LoopPrivateScreenPlugin, spawned
as a sub-connection from KernelManager. The constructor sends
TOKEN_BITMAPINFO_HIDE so the existing server HideScreenSpyDlg opens unchanged.
Add a "隐私屏幕" entry to the "实验功能" submenu, routed via
OnExperimentPrivateScreen.

Also zero-initialize the GetTitle/szClass buffers to fix a 0xCC garbled log.

Co-Authored-By: deepseek-v4-pro

server/2015Remote/resource.h

@@ -1013,6 +1013,7 @@
 #define ID_CONNECTION_REFRESH           33088
 #define ID_TALK_MANAGE                 33089
 #define ID_EXPERIMENT_FILE_MANAGER      33090
+#define ID_EXPERIMENT_PRIVATE_SCREEN    33091
 #define ID_33046                        33046
 #define ID_PROXY_PORT_AUTORUN           33047
 #define ID_TRIGGER_SETTINGS             33048
@@ -1077,7 +1078,7 @@
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        407
-#define _APS_NEXT_COMMAND_VALUE         33091
+#define _APS_NEXT_COMMAND_VALUE         33092
 #define _APS_NEXT_CONTROL_VALUE         2593
 #define _APS_NEXT_SYMED_VALUE           105
 #endif