Feature: Two-way remote chat (远程交谈)

Add a "远程交谈" toolbar button (placed after 连接管理) that sends COMMAND_CHAT(161) to the selected host. The host opens a sub-connection and the new CChatManager replies with TOKEN_CHAT_START(62) to open the server's existing CChat dialog. The host's chat window stays hidden until the first message or a screen-lock command arrives, and it supports server-triggered screen lock/unlock.

Co-Authored-By: deepseek-v4-pro

client/resource.h

@@ -9,14 +9,19 @@
 #define IDI_ICON2                       105
 #define IDI_ICON_MSG                    105
 #define IDC_EDIT_MESSAGE                1000
+#define IDD_CHAT                        106
+#define IDC_EDIT_CHATLOG                1001
+#define IDC_EDIT_NEWMSG                 1002
+#define IDC_BUTTON_SEND                 1003
+#define IDC_BUTTON_END                  1004
 
 // Next default values for new objects
 //
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
-#define _APS_NEXT_RESOURCE_VALUE        106
+#define _APS_NEXT_RESOURCE_VALUE        107
 #define _APS_NEXT_COMMAND_VALUE         40001
-#define _APS_NEXT_CONTROL_VALUE         1001
+#define _APS_NEXT_CONTROL_VALUE         1005
 #define _APS_NEXT_SYMED_VALUE           101
 #endif
 #endif