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/libghostty-spm/Script/support/libcxx-verbose-abort-compat.c

@@ -0,0 +1,18 @@
+// libc++'s std::__1::__libcpp_verbose_abort is only exported by the Apple
+// system libc++.1.dylib since iOS 16.3 / macOS 13.3 / tvOS 16.3. Zig's
+// bundled libc++ headers reference it unconditionally (no Apple availability
+// markup), so apps linking libghostty.a crash at launch on older OS versions
+// with dyld "Symbol missing". Shipping the definition inside the archive
+// resolves the reference at static link time instead.
+//
+// Header-free on purpose: zig cc has no Apple sysroot in this build.
+
+__attribute__((noreturn)) void abort(void);
+
+__attribute__((visibility("hidden"), noreturn))
+void libghostty_libcpp_verbose_abort(const char *format, ...) __asm__("__ZNSt3__122__libcpp_verbose_abortEPKcz");
+
+void libghostty_libcpp_verbose_abort(const char *format, ...) {
+    (void)format;
+    abort();
+}