初始提交：terminalX 可运行态（M0/M1/M1.5 已真机验证）

- M0: libghostty SSH 终端（渲染/输入/连接）+ 白屏修复(OutputGate) + 会话状态机/自动重连
- M1: tsnet 用户态组网 + SSH-over-tsnet(fd 桥)，shell 级真机验证；R5(Go+gvisor+C+++Swift 同进程) retire
- M1.5: tmux -CC 原生 tab（MVP）
- 结构: packages/(TXCore·TXTransport), apps/TerminalX, vendor/(libghostty-spm/libssh2/mbedtls/tsnet-bridge), artifacts/
- 文档: CLAUDE.md + docs/HANDOFF.md（新会话入口）
- 环境: 认证代理→依赖 vendor 本地化；Go 在 ~/.local/go；仅模拟器/未签名
- 待续: M2 mosh, tmux 多 pane, M4 安全(host key/SE)

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

vendor/libssh2/docs/libssh2_session_disconnect_ex.3

@@ -0,0 +1,43 @@
+.\" Copyright (C) The libssh2 project and its contributors.
+.\" SPDX-License-Identifier: BSD-3-Clause
+.TH libssh2_session_disconnect_ex 3 "1 Jun 2007" "libssh2 0.15" "libssh2"
+.SH NAME
+libssh2_session_disconnect_ex - terminate transport layer
+.SH SYNOPSIS
+.nf
+#include <libssh2.h>
+
+int
+libssh2_session_disconnect_ex(LIBSSH2_SESSION *session, int reason,
+                              const char *description,
+                              const char *lang);
+
+int
+libssh2_session_disconnect(LIBSSH2_SESSION *session,
+                           const char *description);
+.fi
+.SH DESCRIPTION
+\fIsession\fP - Session instance as returned by
+.BR libssh2_session_init_ex(3)
+
+\fIreason\fP - One of the Disconnect Reason constants.
+
+\fIdescription\fP - Human readable reason for disconnection.
+
+\fIlang\fP - Localization string describing the language/encoding of the description provided.
+
+Send a disconnect message to the remote host associated with \fIsession\fP,
+along with a \fIreason\fP symbol and a verbose \fIdescription\fP.
+
+As a convenience, the macro
+.BR libssh2_session_disconnect(3)
+is provided. It calls
+.BR libssh2_session_disconnect_ex(3)
+with \fIreason\fP set to SSH_DISCONNECT_BY_APPLICATION
+and \fIlang\fP set to an empty string.
+.SH RETURN VALUE
+Return 0 on success or negative on failure. It returns
+LIBSSH2_ERROR_EAGAIN when it would otherwise block. While
+LIBSSH2_ERROR_EAGAIN is a negative number, it is not really a failure per se.
+.SH SEE ALSO
+.BR libssh2_session_init_ex(3)