refactor(flow): 目录键归一 flowcenter→flow-center（D1）——PlatformService.FLOW_CENTER 机械跟随，FlowCenterClientTest 失败文案断言同步新键；NoticeFlowProperties 注释残留随移动门户线 WIP 后续处理

src/main/java/com/yunhai/notice/service/flow/FlowCenterClient.java

@@ -18,7 +18,7 @@ import java.util.Map;
 
 /**
  * FlowClient 默认实现：主路径走 SDK 类型化门面 {@link YschFlowOpenApi}（服务目录 key=
- * {@code flowcenter}：yh.call.targets > yh.open.services > 枚举 base-host 兜底，
+ *{@code flow-center}：yh.call.targets > yh.open.services > 枚举 base-host 兜底，
  * 《子应用配置优化方案》§4.2 零专属地址配置）；目录未显式配置时回落本应用 legacy 键
  * {@code notice.flow.base-url}（ad-hoc TargetSpec，迁移期兼容）。签名/信封解析/错误映射
  * 全部由 SDK 统一承载（401/403→DException、code!=0→DException、传输错→OpenApiException）。
@@ -54,7 +54,7 @@ public class FlowCenterClient implements FlowClient {
         }
         this.openCall = call;
         // 服务目录显式配置（targets/services）则走门面命名目标；否则回落 legacy base-url ad-hoc
-        this.directoryResolved = call.hasTarget(com.yunhai.platform.openapi.core.PlatformService.FLOWCENTER.key());
+        this.directoryResolved = call.hasTarget(com.yunhai.platform.openapi.core.PlatformService.FLOW_CENTER.key());
         if (directoryResolved) {
             com.yunhai.platform.openapi.flow.YschFlowOpenApi.setCall(call);
         }
@@ -64,7 +64,7 @@ public class FlowCenterClient implements FlowClient {
             // 避免静默打 localhost 把"地址没配"伪装成"流程中心不可达"。
             // enabled=false（显式未接入）时不校验——地址本就不需要。
             throw new IllegalStateException("流程中心调用地址未配置：请配置服务目录 yh.open.services."
-                    + com.yunhai.platform.openapi.core.PlatformService.FLOWCENTER.key()
+                    + com.yunhai.platform.openapi.core.PlatformService.FLOW_CENTER.key()
                     + "（推荐，容器直连完整 URL）或回落键 notice.flow.base-url");
         }
     }

src/main/java/com/yunhai/notice/service/flow/NoticeApprovalClient.java

@@ -26,7 +26,7 @@ import java.util.Map;
 @Service
 public class NoticeApprovalClient {
 
-    private static final String TARGET = PlatformService.FLOWCENTER.key();
+    private static final String TARGET = PlatformService.FLOW_CENTER.key();
     private static final String NOT_CONNECTED = "流程中心未接入，审批功能不可用";
 
     private final NoticeFlowProperties properties;

src/test/java/com/yunhai/notice/service/flow/FlowCenterClientTest.java

@@ -150,7 +150,7 @@ class FlowCenterClientTest {
                 (host, basePath) -> java.util.Collections.emptyList());
         IllegalStateException e = assertThrows(IllegalStateException.class,
                 () -> new FlowCenterClient(props, new FixedProvider<>(openCall), null, objectMapper));
-        assertTrue(e.getMessage().contains("yh.open.services.flowcenter"), e.getMessage());
+        assertTrue(e.getMessage().contains("yh.open.services.flow-center"), e.getMessage());
         assertTrue(e.getMessage().contains("notice.flow.base-url"), e.getMessage());
     }