fix(cli): wrap zsh completion in eval for dash compatibility (#1280)

#### Description
Fixes an issue where Ubuntu desktop login fails because the generated
`~/.vite-plus/env` file contains Zsh-specific array syntax that is
incompatible with the POSIX `dash` shell used during login.

#### Changes
- Wrapped Zsh completion logic in an `eval` block in
`crates/vite_global_cli/src/commands/env/setup.rs`.
- Updated unit tests to check for the `eval` wrapper.

#### Verification
- Manually verified the snippet using `dash` (POSIX compliant).
- Note: Full `pnpm test` was blocked by upstream `fspy` compilation
issues, but the fix follows the standard shell-portability pattern used
in similar projects (e.g., nvm).

Co-authored-by: MK (fengmk2) <fengmk2@gmail.com>

Author: shaneturner

crates/vite_global_cli/src/commands/env/setup.rs

@@ -449,13 +449,15 @@ if [ -n "$BASH_VERSION" ] && type complete >/dev/null 2>&1; then
     eval "$(VP_COMPLETE=bash command vp)"
 elif [ -n "$ZSH_VERSION" ] && type compdef >/dev/null 2>&1; then
     eval "$(VP_COMPLETE=zsh command vp)"
+    eval '
     _vpr_complete() {
         local -a orig=("${words[@]}")
         words=("vp" "run" "${orig[@]:1}")
         CURRENT=$((CURRENT + 1))
         ${=_comps[vp]}
     }
     compdef _vpr_complete vpr
+    '
 fi
 "#
     .replace("__VP_BIN__", &bin_path_ref);
@@ -918,6 +920,10 @@ mod tests {
             env_content.contains("compdef _vpr_complete vpr"),
             "env should have vpr completion for zsh"
         );
+        assert!(
+            env_content.contains("eval '") && env_content.contains("_vpr_complete() {"),
+            "env should wrap zsh-specific code in eval"
+        );
         assert!(fish_content.contains("complete -c vpr"), "env.fish should have vpr completion");
         assert!(
             ps1_content.contains("Register-ArgumentCompleter -Native -CommandName vpr"),