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/Tests/GhosttyKitTest/TerminalSurfaceOptionsTests.swift

@@ -0,0 +1,23 @@
+@testable import GhosttyTerminal
+import Testing
+
+struct TerminalSurfaceOptionsTests {
+    @Test
+    func `envVars default to empty`() {
+        #expect(TerminalSurfaceOptions().envVars.isEmpty)
+    }
+
+    @Test
+    func `isEquivalent considers envVars`() {
+        let base = TerminalSurfaceOptions(workingDirectory: "/tmp", envVars: ["A": "1"])
+        #expect(base.isEquivalent(to: base))
+
+        var changedValue = base
+        changedValue.envVars = ["A": "2"]
+        #expect(!base.isEquivalent(to: changedValue))
+
+        var extraEntry = base
+        extraEntry.envVars = ["A": "1", "B": "2"]
+        #expect(!base.isEquivalent(to: extraEntry))
+    }
+}