feat: 按模型上下文自动配置智能体压缩阈值

- 从 llm.json 解析上下文与输出上限，并增强短模型 ID 匹配

- 切换模型、保存和试运行时按预算公式重算，目录缺失时回退 30K

- 修复模型列表接口未返回能力元数据

easyflow-api/easyflow-api-admin/src/test/java/tech/easyflow/admin/controller/ai/ModelControllerTest.java

@@ -0,0 +1,41 @@
+package tech.easyflow.admin.controller.ai;
+
+import org.testng.Assert;
+import org.testng.annotations.Test;
+import tech.easyflow.ai.entity.Model;
+import tech.easyflow.ai.service.ModelService;
+import tech.easyflow.common.domain.Result;
+
+import java.util.List;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+/**
+ * 模型列表控制器测试。
+ */
+public class ModelControllerTest {
+
+    /**
+     * 验证模型列表使用包含目录能力元数据的服务查询。
+     */
+    @Test
+    public void listShouldReturnCapabilityDecoratedModels() {
+        ModelService service = mock(ModelService.class);
+        Model query = new Model();
+        Model decoratedModel = new Model();
+        decoratedModel.setContextWindowTokens(1_000_000L);
+        decoratedModel.setMaxOutputTokens(64_000L);
+        when(service.listSelectableModels(query, false, "id", "desc"))
+                .thenReturn(List.of(decoratedModel));
+        ModelController controller = new ModelController(service);
+
+        Result<List<Model>> result = controller.list(query, false, "id", "desc");
+
+        Assert.assertSame(decoratedModel, result.getData().get(0));
+        Assert.assertEquals(Long.valueOf(1_000_000L),
+                result.getData().get(0).getContextWindowTokens());
+        verify(service).listSelectableModels(query, false, "id", "desc");
+    }
+}