[Feature] 鸿蒙平台客户端支持 (agent-mobile / Tauri)

[Islatri]

Affected area

Mobile Client (agent-mobile / Tauri)

Problem statement (what should this solve)

基本与 #464 相同

Linked PR

WIP

Proposed behavior

详见 #464

Estimated change scope

crates/agent-mobile

Alternatives considered

实际上tauri对鸿蒙的支持还未合入主干版本，仅停留在feat/open-harmony分支，但是已经具备开发薄壳应用、编译打包.hap并发行的能力，更多系统能力的适配和支持有待于tauri的ohos开源生态发展

Pre-submit checklist

• I searched existing issues and pull requests and found no duplicates.
• This proposal is focused on a single feature or improvement.
• I understand a PR should come after this issue is confirmed by maintainers, otherwise it will be converted to draft.

[Islatri]

• 先等安卓pr合入主干，支持ohos还需要在agent-mobile基础上配置解决一下tauri相关patch包的问题