feat: support select child packer

boot/src/main/java/com/reajason/javaweb/boot/controller/ConfigController.java

@@ -1,6 +1,7 @@
 package com.reajason.javaweb.boot.controller;
 
 import com.reajason.javaweb.boot.vo.CommandConfigVO;
+import com.reajason.javaweb.boot.vo.PackerVO;
 import com.reajason.javaweb.memshell.ServerFactory;
 import com.reajason.javaweb.memshell.config.CommandConfig;
 import com.reajason.javaweb.memshell.server.AbstractServer;
@@ -40,6 +41,21 @@ public class ConfigController {
                 .map(Packers::name).toList();
     }
 
+    /**
+     * 返回父/子 packer 层级结构，供前端在「父模式 / 子模式」之间选择。
+     * 单独新增端点而非修改 {@link #getPackers()}，以避免破坏旧版本前端对返回值的依赖。
+     */
+    @RequestMapping("/packers/tree")
+    public List<PackerVO> getPackerTree() {
+        return Arrays.stream(Packers.values())
+                .filter(packers -> packers.getParentPacker() == null)
+                .map(packers -> new PackerVO(
+                        packers.name(),
+                        Packers.getPackersWithParent(packers.getInstance().getClass())
+                                .stream().map(Packers::name).toList()))
+                .toList();
+    }
+
     @RequestMapping
     public Map<String, Map<?, ?>> config() {
         Map<String, Map<?, ?>> coreMap = new HashMap<>(16);

boot/src/main/java/com/reajason/javaweb/boot/vo/PackerVO.java

@@ -0,0 +1,10 @@
+package com.reajason.javaweb.boot.vo;
+
+import java.util.List;
+
+/**
+ * @author ReaJason
+ * @since 2026/6/27
+ */
+public record PackerVO(String name, List<String> children) {
+}