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/mbedtls/.github/pull_request_template.md

@@ -0,0 +1,28 @@
+## Description
+
+Please write a few sentences describing the overall goals of the pull request's commits.
+
+
+
+## PR checklist
+
+Please tick as appropriate and edit the reasons (e.g.: "backport: not needed because this is a new feature")
+
+- [ ] **changelog** provided, or not required
+- [ ] **3.6 backport** done, or not required
+- [ ] **2.28 backport** done, or not required
+- [ ] **tests** provided, or not required
+
+
+
+## Notes for the submitter
+
+Please refer to the [contributing guidelines](https://github.com/Mbed-TLS/mbedtls/blob/development/CONTRIBUTING.md), especially the
+checklist for PR contributors.
+
+Help make review efficient:
+* Multiple simple commits
+  - please structure your PR into a series of small commits, each of which does one thing
+* Avoid force-push
+  - please do not force-push to update your PR - just add new commit(s)
+* See our [Guidelines for Contributors](https://mbed-tls.readthedocs.io/en/latest/reviews/review-for-contributors/) for more details about the review process.