fix(ci): checkout 拉 submodules — 修 mac 端 qwen-asr build fail

[appergb]

User description

现象

release-tauri run 25415755417 中 mac arm64 在 `cargo build` 阶段挂掉：

```
error: no such file or directory: 'vendor/qwen-asr/qwen_asr.c'
clang: error: no input files

Linux / Windows 这次同 run 都过了（验证 PR #281 的 Tauri 版本锁有效）。

## 根因
- \`build.rs\` 的 \`#[cfg(target_os = "macos")]\` 分支用 cc-rs 编译 \`vendor/qwen-asr/*.c\`
- \`vendor/qwen-asr\` 是 git submodule（\`.gitmodules\` → antirez/qwen-asr）
- CI \`actions/checkout@v4\` 默认 \*\*不\*\* 拉 submodule → 目录空 → cc 找不到源文件
- Linux / Windows \`build.rs\` 不进 cc 路径，没踩；mac 是唯一编译 qwen-asr 的平台

## 修复
\`release-tauri.yml\` + \`ci.yml\` 两处 \`actions/checkout@v4\` 都加 \`with: submodules: recursive\`。

ci.yml 实际只跑 windows，理论上不需要 submodule，但跟 release-tauri.yml 保持一致避免后续踩同一坑。

## Test plan
- [ ] PR CI 通过
- [ ] 合并后 \`workflow_dispatch release-tauri.yml\` 全 4 platform build 成功（这次 mac 应能编 qwen-asr）


___

### **PR Type**
Bug fix


___

### **Description**
- Enable recursive submodule checkout

- Fix macOS `qwen-asr` build failures

- Keep CI and release workflows aligned


___

### Diagram Walkthrough


```mermaid
flowchart LR
  A["actions/checkout@v4"] -- "without submodules" --> B["Empty vendor/qwen-asr"]
  B -- "macOS build.rs compiles C sources" --> C["cargo build fails"]
  A -- "with `submodules: recursive`" --> D["Submodule sources available"]
  D -- "shared workflow fix" --> E["CI and release builds succeed"]

File Walkthrough

	Relevant files
Configuration changes	ci.yml Fetch submodules in Windows CI                                                      .github/workflows/ci.yml Added submodules: recursive to actions/checkout@v4. Ensures the Windows CI job also fetches vendor/qwen-asr. Keeps CI checkout behavior consistent with the release workflow. +4/-0
Bug fix	release-tauri.yml Fix release workflow submodule checkout                                    .github/workflows/release-tauri.yml Added recursive submodule checkout to the release workflow. Prevents macOS cargo build failures caused by missing vendor/qwen-asr sources. Documents why the submodule is required for build.rs. +4/-0

---

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