test(agent): cover skill tool container fallback and defensive paths

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

liteflow-testcase-el/liteflow-testcase-el-react-agent/src/test/java/com/yomahub/liteflow/test/agent/unit/SkillBoxFactoryTest.java

@@ -100,6 +100,36 @@ public class SkillBoxFactoryTest {
         }
     }
 
+    @Test
+    public void testToolFallsBackToReflectionWhenAbsentFromContainer() throws Exception {
+        StubContextAware emptyContainer = new StubContextAware(); // 不注册任何 bean
+        installContextAware(emptyContainer);
+        try {
+            SkillLoadResult result = SkillBoxFactory.build(new Toolkit(), cfg, List.of("tool-skill"));
+
+            Assertions.assertEquals(List.of("tool-skill"), result.skillNames());
+            // 容器中无该 bean，降级反射实例化一次
+            Assertions.assertEquals(1, SkillEchoTool.CONSTRUCT_COUNT.get());
+        } finally {
+            ContextAwareHolder.clean();
+        }
+    }
+
+    @Test
+    public void testToolFallsBackToReflectionWhenContainerAccessFails() throws Exception {
+        StubContextAware brokenContainer = new StubContextAware(true); // hasBean 抛异常，模拟容器未就绪
+        installContextAware(brokenContainer);
+        try {
+            SkillLoadResult result = SkillBoxFactory.build(new Toolkit(), cfg, List.of("tool-skill"));
+
+            Assertions.assertEquals(List.of("tool-skill"), result.skillNames());
+            // 容器访问异常被吞掉并降级反射实例化一次
+            Assertions.assertEquals(1, SkillEchoTool.CONSTRUCT_COUNT.get());
+        } finally {
+            ContextAwareHolder.clean();
+        }
+    }
+
     @Test
     public void testEmptyAllowListLoadsAllSkills() {
         SkillLoadResult result = SkillBoxFactory.build(new Toolkit(), cfg, List.of());