fix(cli): keep opencode2 as a working alias

install

@@ -366,19 +366,14 @@ install_legacy_shim() {
     if [[ "$shim_os" == "windows" ]]; then
         cat > "$INSTALL_DIR/opencode2.cmd" <<'EOF'
 @echo off
-echo "opencode2" has been renamed to "opencode". Run "opencode" instead.
-echo.
-echo If you have OpenCode v1 installed, you may need to uninstall it so the "opencode" command launches the correct installation.
-exit /b 1
+"%~dp0opencode.exe" %*
+exit /b %errorlevel%
 EOF
         return
     fi
     cat > "$INSTALL_DIR/opencode2" <<'EOF'
 #!/bin/sh
-echo '"opencode2" has been renamed to "opencode". Run "opencode" instead.'
-echo
-echo 'If you have OpenCode v1 installed, you may need to uninstall it so the "opencode" command launches the correct installation.'
-exit 1
+exec "$(dirname "$0")/opencode" "$@"
 EOF
     chmod 755 "$INSTALL_DIR/opencode2"
 }