Feature: Add host management and connection management MCP tools

Expose the online-list TLS column through list_online_hosts, search_hosts
and get_host_detail. The value comes from the flag the client reports at
login, so old clients always read false.

Add list_network_connections and kill_network_connection on top of the
connection manager sub-connection protocol. The kill path matches the
original 110-byte record instead of rebuilding addresses, supports a dry
run, refuses UDP/IPv6 targets, and verifies that the quadruple really
disappeared instead of assuming success.

Add a host_* family backed by the machine manager protocol: ten read
tools covering every tab of the host management dialog, and four
recoverable write tools for process freeze/thaw, window restore/hide/
maximize/minimize, service start/stop/pause/continue/restart, and
scheduled task run/stop. Every write re-reads the snapshot before sending
and re-checks afterwards, reporting -32009 for stale targets rather than
acting blindly. The family is gated by McpMachine, the risky subset by
McpMachineDangerous, and writes additionally require read-only mode to
be off.

Route managed sub-connections from MessageHandle and OfflineProc, keep
the single-in-flight rule by sharing the pending table with a request
kind, and move the shared JSON/lock/encoding helpers into McpInternal so
both tool families use one implementation. Settings dialog, design docs
and en_US/zh_TW/de_DE translations are updated accordingly.

Co-Authored-By: deepseek-flash

server/2015Remote/lang/en_US.ini

@@ -1997,7 +1997,7 @@ MCP
 端口需为 1-65535 的数字=Port must be a number between 1 and 65535
 Token 不能为空=Token cannot be empty
 MCP 设置已保存。=MCP settings saved.
-启用/端口/绑定地址/Token/只读/白名单/持久终端/远程控制/文件传输/管理操作的改动需重启程序生效。=Changes to enable/port/bind address/token/read-only/whitelist/persistent terminal/remote control/file transfer/management operations take effect after restart.
+启用/端口/绑定地址/Token/只读/白名单/持久终端/远程控制/文件传输/管理操作/主机管理/危险主机操作的改动需重启程序生效。=Changes to enable/port/bind address/token/read-only/whitelist/persistent terminal/remote control/file transfer/management operations/host management/dangerous host operations take effect after restart.
 只读模式（禁命令执行）=Read-only mode (disable command execution)
 命令白名单=Command whitelist
 MCP命令执行=MCP command execution
@@ -2011,6 +2011,10 @@ Token=Token
 启用远程控制（AI 操控桌面）=Enable remote control (AI controls the desktop)
 启用文件传输（download_file）=Enable file transfer (download_file)
 启用管理操作（进程/窗口/服务/电源）=Enable management operations (process/window/service/power)
+启用主机管理（进程/窗口/服务/任务/网络状态）=Enable host management (processes/windows/services/tasks/network state)
+启用危险主机操作（冻结/解冻进程、停止/重启服务）=Enable dangerous host operations (freeze/thaw process, stop/restart service)
+危险主机操作依附于主机管理：请先启用主机管理。=Dangerous host operations depend on host management. Enable host management first.
+主机管理的写操作需只读模式关闭；冻结/解冻进程、停止/重启服务还需启用危险主机操作。=Host management write operations require read-only mode to be off; freezing/thawing processes and stopping/restarting services also require dangerous host operations.
 第 %d 个钱包地址不合法!=Wallet address #%d is invalid!
 %d 新连接\r\n=%d New connection\r\n
 %d 本地连接断开\r\n=%d Local connection closed\r\n