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/os400/os400sys.c

@@ -0,0 +1,168 @@
+/*
+ * Copyright (C) Patrick Monnerat <patrick@monnerat.net>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms,
+ * with or without modification, are permitted provided
+ * that the following conditions are met:
+ *
+ *   Redistributions of source code must retain the above
+ *   copyright notice, this list of conditions and the
+ *   following disclaimer.
+ *
+ *   Redistributions in binary form must reproduce the above
+ *   copyright notice, this list of conditions and the following
+ *   disclaimer in the documentation and/or other materials
+ *   provided with the distribution.
+ *
+ *   Neither the name of the copyright holder nor the names
+ *   of any other contributors may be used to endorse or
+ *   promote products derived from this software without
+ *   specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
+ * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
+ * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
+ * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
+ * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
+ * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE
+ * USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY
+ * OF SUCH DAMAGE.
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+/* OS/400 additional support. */
+
+#define LIBSSH2_DISABLE_QADRT_EXT
+
+#include "libssh2_priv.h"
+
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <sys/un.h>
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stddef.h>
+#include <stdarg.h>
+#include <string.h>
+#include <alloca.h>
+#include <netdb.h>
+#include <qadrt.h>
+#include <errno.h>
+
+#include <netinet/in.h>
+#include <arpa/inet.h>
+
+#ifdef LIBSSH2_HAVE_ZLIB
+# include <zlib.h>
+#endif
+
+
+/**
+***     QADRT OS/400 ASCII runtime defines only the most used procedures, but
+***             a lot of them are not supported. This module implements
+***             ASCII wrappers for those that are used by libssh2, but not
+***             defined by QADRT.
+**/
+
+#pragma convert(37)                             /* Restore EBCDIC. */
+
+
+static int
+convert_sockaddr(struct sockaddr_storage *dstaddr,
+                 const struct sockaddr *srcaddr, int srclen)
+{
+    const struct sockaddr_un *srcu;
+    struct sockaddr_un *dstu;
+    unsigned int i;
+    unsigned int dstsize;
+
+    /* Convert a socket address into job CCSID, if needed. */
+
+    if(!srcaddr || srclen < offsetof(struct sockaddr, sa_family) +
+       sizeof(srcaddr->sa_family) || srclen > sizeof(*dstaddr)) {
+        errno = EINVAL;
+        return -1;
+    }
+
+    memcpy((char *) dstaddr, (char *) srcaddr, srclen);
+
+    switch(srcaddr->sa_family) {
+
+    case AF_UNIX:
+        srcu = (const struct sockaddr_un *) srcaddr;
+        dstu = (struct sockaddr_un *) dstaddr;
+        dstsize = sizeof(*dstaddr) - offsetof(struct sockaddr_un, sun_path);
+        srclen -= offsetof(struct sockaddr_un, sun_path);
+        i = QadrtConvertA2E(dstu->sun_path, srcu->sun_path,
+                            dstsize - 1, srclen);
+        dstu->sun_path[i] = '\0';
+        i += offsetof(struct sockaddr_un, sun_path);
+        srclen = i;
+    }
+
+    return srclen;
+}
+
+
+int
+_libssh2_os400_connect(int sd, struct sockaddr *destaddr, int addrlen)
+{
+    int i;
+    struct sockaddr_storage laddr;
+
+    i = convert_sockaddr(&laddr, destaddr, addrlen);
+
+    if(i < 0)
+        return -1;
+
+    return connect(sd, (struct sockaddr *) &laddr, i);
+}
+
+
+#ifdef LIBSSH2_HAVE_ZLIB
+int
+_libssh2_os400_inflateInit_(z_streamp strm,
+                            const char *version, int stream_size)
+{
+    char *ebcversion;
+    int i;
+
+    if(!version)
+        return Z_VERSION_ERROR;
+    i = strlen(version);
+    ebcversion = alloca(i + 1);
+    if(!ebcversion)
+        return Z_VERSION_ERROR;
+    i = QadrtConvertA2E(ebcversion, version, i, i - 1);
+    ebcversion[i] = '\0';
+    return inflateInit_(strm, ebcversion, stream_size);
+}
+
+int
+_libssh2_os400_deflateInit_(z_streamp strm, int level,
+                            const char *version, int stream_size)
+{
+    char *ebcversion;
+    int i;
+
+    if(!version)
+        return Z_VERSION_ERROR;
+    i = strlen(version);
+    ebcversion = alloca(i + 1);
+    if(!ebcversion)
+        return Z_VERSION_ERROR;
+    i = QadrtConvertA2E(ebcversion, version, i, i - 1);
+    ebcversion[i] = '\0';
+    return deflateInit_(strm, level, ebcversion, stream_size);
+}
+
+#endif