Add shared runner dependency setup for Linux and Windows

README.md

@@ -82,7 +82,9 @@ The workflow builds the **Windows installer**, pushes the **panel image to Gitea
 
 ### Gitea runner setup
 
-Register a Linux host runner with the `ubuntu-latest` label and a Windows host runner with `windows-latest`. The CI workflows check the host OS and required tools before building. The Linux host needs Rust with `rustfmt` and `clippy`, Node 22+, Java 21 and 25 for the integration matrix, Docker with Buildx, `pkg-config`, the Tauri WebKit/GTK development libraries, `curl`, and `jq`. The Windows host needs Rust, Node 22+, PowerShell and Git Bash. Enable Actions for the repository and allow its job token to write releases and packages. See [Gitea's runner labels](https://docs.gitea.com/runner/labels/) and [token permissions](https://docs.gitea.com/usage/actions/token-permissions/).
+Register a Linux host runner with the `ubuntu-latest` label and a Windows host runner with `windows-latest`. Linux builds the panel Docker image and server JARs; Windows builds the NSIS installer. The workflows use [the Linux setup tool](scripts/ci/install-linux.sh) and [the Windows setup tool](scripts/ci/install-windows.ps1) to install or check job dependencies. Node 22 and Java 21/25 are downloaded by `setup-node` and `setup-java`; the Linux tool installs Rust, Tauri system packages, and release utilities, while the Windows tool installs Rust and downloads PowerShell 7.6.6 if the runner cannot find it. Docker and Buildx are set up by Docker's Actions. The Linux runner must allow a Docker daemon to start or provide one, and system package installation needs root or passwordless sudo. Enable Actions for the repository and allow its job token to write releases and packages. See [Gitea's runner labels](https://docs.gitea.com/runner/labels/) and [token permissions](https://docs.gitea.com/usage/actions/token-permissions/).
+
+The setup tools also run directly on matching hosts: `bash scripts/ci/install-linux.sh rust` prepares Rust and Tauri builds, `bash scripts/ci/install-linux.sh image` checks Docker, `bash scripts/ci/install-linux.sh java 21` checks a Java integration runner, and `powershell -File scripts/ci/install-windows.ps1` prepares the Windows installer runner. Gitea uses them in CI and release jobs; GitHub provides a manual **Runner setup** workflow for both platforms. Run the Linux `rust` mode as root or with passwordless sudo; the Windows script may need administrator rights to install Microsoft C++ Build Tools.
 
 ## Repository layout