feat(bpm): 新增流程变量本地服务及完善 XiSpeak 流程相关功能

- 新增 BpmVariableLocalService 流程变量本地服务接口及实现
- XiSpeakFlow 完善流程变量读取逻辑
- ActProcessController 流程控制器功能增强
- FlowNodeExpression 扩展表达式能力

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

jeecg-boot-module/jeecg-module-flow/src/main/java/org/jeecg/xispeak/XiSpeakFlow.java

@@ -194,6 +194,25 @@ public class XiSpeakFlow {
         return flowNodeExpression.getSonProcessHqVariableList(execution,xiSpeakConfig.getXiSpeak().getTemImplWorkerKey()).size();
     }
 
+    /**
+     * 流程表达式内用法: ${xiSpeakFlow.getIsEnd(execution)}
+     */
+    public int getIsEnd(DelegateExecution execution) {
+        Object value = flowNodeExpression.getSonProcessHqVariable(execution, "isEnd");
+        if (value == null) {
+            return 0;
+        }
+        if (value instanceof Number) {
+            return ((Number) value).intValue();
+        }
+        try {
+            return Integer.parseInt(String.valueOf(value));
+        } catch (NumberFormatException e) {
+            log.warn("isEnd变量值无法解析为int: {}", value);
+            return 0;
+        }
+    }
+
     /**
      * 流程表达式内用法: ${xiSpeakFlow.getTemImplLeaderList(execution)}
      */
@@ -222,6 +241,13 @@ public class XiSpeakFlow {
         return flowNodeExpression.getSonProcessHqVariableList(execution,xiSpeakConfig.getXiSpeak().getTemBgLeaderKey()).size();
     }
 
+    /**
+     * 流程表达式内用法: ${xiSpeakFlow.getTemBgLeaderListLength(execution)}
+     */
+    public int getImplDeptLeaderIsEnd(DelegateExecution execution) {
+        return flowNodeExpression.getSonProcessHqVariableList(execution,xiSpeakConfig.getXiSpeak().getTemBgLeaderKey());
+    }
+
 
     /**
      * 流程表达式内用法: ${xiSpeakFlow.getTemBgLeader(execution)}