Feature: Add "Ban IP" to log message context menu in main dialog

- Add "Ban IP" menu item to the log message list (m_CList_Message)
  right-click context menu, allowing users to extract IPv4 addresses from
  selected log entries and add them directly to the IP blacklist
- Reuses ExtractFirstIPFromMessage() from the previous commit for
  dependency-free IPv4 parsing with per-segment 0-255 validation
- Checks against whitelist before banning (whitelisted IPs cannot be
  banned) and skips IPs already in blacklist with clear feedback
- Immediately persists via THIS_CFG.SetStr to the config ini file;
  IPBlacklist singleton takes effect instantly — subsequent connections
  from banned IPs are rejected in IOCPServer::OnAccept() which already
  calls IsIPBlacklisted() on every new connection
- Menu item is grayed out when no log entry is selected
- Sync en_US / zh_TW language files with new translation strings

Co-Authored-By: DeepSeek V4 Pro

server/2015Remote/resource.h

@@ -992,6 +992,7 @@
 #define ID_MSGLOG_COPY                  33043
 #define ID_MSGLOG_SEARCH                33078
 #define ID_MSGLOG_LOGIN_NOTIFY          33079
+#define ID_MSGLOG_BAN_IP                33080
 #define ID_WEB_REMOTE_CONTROL           33044
 #define ID_TOOL_PLUGIN_SETTINGS         33045
 #define ID_33046                        33046
@@ -1033,7 +1034,7 @@
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        398
-#define _APS_NEXT_COMMAND_VALUE         33080
+#define _APS_NEXT_COMMAND_VALUE         33081
 #define _APS_NEXT_CONTROL_VALUE         2542
 #define _APS_NEXT_SYMED_VALUE           105
 #endif