docs: define the Vite+ user-level default

Author: fengmk2

README.md

@@ -345,7 +345,7 @@ jobs:
 
 When `working-directory` is set, relative `run-install.cwd`, `node-version-file`, `version-file`, and `cache-dependency-path` values are resolved from that directory.
 
-Omitting both `node-version` and `node-version-file` leaves the session without an override. With the Vite+ Node.js manager enabled, its shims search the current directory and its parents for `.node-version`, `package.json#devEngines.runtime`, `package.json#engines.node`, and `.nvmrc`, in that order. If the project does not declare a version, Vite+ uses its global default and then latest LTS.
+Omitting both `node-version` and `node-version-file` leaves the session without an override. With the Vite+ Node.js manager enabled, its shims search the current directory and its parents for `.node-version`, `package.json#devEngines.runtime`, `package.json#engines.node`, and `.nvmrc`, in that order. If the project does not declare a version, Vite+ uses the user-level default. Set this default with `vp env default <version>`. Vite+ stores this setting under `VP_HOME` (`~/.vite-plus` by default). If no user-level default exists, Vite+ uses the latest LTS release.
 
 `node-manager: false` skips Node.js shim creation and runs `vp env off`, so `vp` commands prefer the Node.js already on `PATH`. It cannot be combined with `node-version` or `node-version-file`.
 

action.yml

@@ -22,7 +22,7 @@ inputs:
     required: false
     default: "false"
   node-version:
-    description: "Node.js version to install via `vp env use`. Omit this input and node-version-file to let Vite+ resolve the version from the project, then its global default, then latest LTS."
+    description: "Node.js version to install via `vp env use`. Omit this input and node-version-file to let Vite+ resolve the version. `vp env default <version>` sets the user-level default. Vite+ checks the project, this default, and then the latest LTS release."
     required: false
   node-version-file:
     description: "Path to file containing the Node.js version spec (.nvmrc, .node-version, .tool-versions, package.json). Ignored when node-version is specified."