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

- Add "Unban IP" menu item to the log message list (m_CList_Message)
  right-click context menu, performing two actions on the extracted IP:
  1. Remove the IP from the IPBlacklist singleton and persist to config
  2. Scan the entire history host list (m_ClientMap->GetAll()) for all
     clients matching the IP with AUTH_FORBIDDEN status, and restore
     them to UNAUTHORIZED (0) — requiring re-authorization for safety
- Reuses ExtractFirstIPFromMessage() for dependency-free IPv4 parsing
- Handles the case where an IP is not in the blacklist and has no
  matching forbidden clients with a clear "no action needed" message
- 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

@@ -993,6 +993,7 @@
 #define ID_MSGLOG_SEARCH                33078
 #define ID_MSGLOG_LOGIN_NOTIFY          33079
 #define ID_MSGLOG_BAN_IP                33080
+#define ID_MSGLOG_UNBAN_IP              33081
 #define ID_WEB_REMOTE_CONTROL           33044
 #define ID_TOOL_PLUGIN_SETTINGS         33045
 #define ID_33046                        33046
@@ -1034,7 +1035,7 @@
 #ifdef APSTUDIO_INVOKED
 #ifndef APSTUDIO_READONLY_SYMBOLS
 #define _APS_NEXT_RESOURCE_VALUE        398
-#define _APS_NEXT_COMMAND_VALUE         33081
+#define _APS_NEXT_COMMAND_VALUE         33082
 #define _APS_NEXT_CONTROL_VALUE         2542
 #define _APS_NEXT_SYMED_VALUE           105
 #endif