0.27.0-beta.5

feat: improve native preview (#15223)

#### PR Dependency Tree


* **PR #15223** 👈

This tree was auto-generated by
[Charcoal](https://github.com/danerwilliams/charcoal)

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## Summary by CodeRabbit

* **Improvements**
* Updated Mermaid and Typst preview rendering in native/mobile apps to
use a shared preview implementation.
* Improved production Release builds with additional Rust release tuning
and enhanced iOS Release stripping/symbol settings.
* Enabled stronger release output optimization for the native package
build.
* **Bug Fixes**
* Strengthened handling of unsupported self-hosted server versions
during login preflight.
* Refreshed unsupported-version messaging with localized text and a
direct upgrade link.
* **Tests**
* Added coverage for login preflight behavior when the server version is
unsupported.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->