fix(ci): avoid Groovy GString parse errors in Jenkins shell block

Jenkins CPS Groovy rejects patterns like if [ "${params.X}" = "true" ].
Assign params to shell variables first, then use $VAR in tests and EXTRA_ARGS.

Made-with: Cursor

Jenkinsfile

@@ -135,24 +135,27 @@ pipeline {
                             [ -f "\\$HOME/.zshrc" ] && source "\\$HOME/.zshrc" > /dev/null 2>&1
                             cd apps/${currentApp}
                             
-                            if [ "${params.CLEAN_BUILD}" = "true" ]; then
+                            # 先写入 shell 变量，避免 GString 里出现 "\${params.xxx}" 触发 Groovy 解析错误
+                            CLEAN_BUILD='${params.CLEAN_BUILD}'
+                            VERSION_NAME='${params.VERSION_NAME}'
+                            BUILD_NUMBER='${params.BUILD_NUMBER}'
+                            BUILD_ENV='${params.BUILD_ENVIRONMENT}'
+                            
+                            if [ "\$CLEAN_BUILD" = "true" ]; then
                                 echo "  - 执行 flutter clean..."
                                 fvm flutter clean
                             fi
                             
                             fvm flutter pub get
                             
-                            # 拼接附加构建参数 (Groovy 中 \$ 转义 $，避免被当作 Jenkins 变量插值)
                             EXTRA_ARGS=""
-                            if [ ! -z "${params.VERSION_NAME}" ]; then
-                                EXTRA_ARGS="\$EXTRA_ARGS --build-name=${params.VERSION_NAME}"
+                            if [ -n "\$VERSION_NAME" ]; then
+                                EXTRA_ARGS="\$EXTRA_ARGS --build-name=\$VERSION_NAME"
                             fi
-                            if [ ! -z "${params.BUILD_NUMBER}" ]; then
-                                EXTRA_ARGS="\$EXTRA_ARGS --build-number=${params.BUILD_NUMBER}"
+                            if [ -n "\$BUILD_NUMBER" ]; then
+                                EXTRA_ARGS="\$EXTRA_ARGS --build-number=\$BUILD_NUMBER"
                             fi
-                            
-                            # 注入环境变量参数用于代码判断 (如需要)
-                            EXTRA_ARGS="\$EXTRA_ARGS --dart-define=APP_ENV=${params.BUILD_ENVIRONMENT}"
+                            EXTRA_ARGS="\$EXTRA_ARGS --dart-define=APP_ENV=\$BUILD_ENV"
                             
                             echo "  - 开始构建 APK 参数: \$EXTRA_ARGS"
                             fvm flutter build apk --release \$EXTRA_ARGS