feat(admin): 管理面信封化+分页化，OpenAPI 文档端点旁路（B1-B6）

- pom: 引 yh-platform-dependencies(import) / yh-api-std / springdoc-openapi-ui 1.7.0 + nexus-public 仓库
- RoutingFilter.isGatewayInternal: /v3/api-docs、/swagger-ui/**、/swagger-ui.html 纳入自身路径旁路，避免被 TargetRouter 当 target 裸 404
- InternalAdminController: page/routes/targets/logs 三接口分页化返回 BasePageResult；补 @Operation(operationId=GatewayAdmin.*)；错误契约去 @ResponseStatus(400) 改 200+code=2；logs 兼容旧 limit 入参
- RouteRefreshController: 补 @Tag/@Operation(operationId=GatewayAdmin.refresh)
- static/admin.html: 适配 {code,msg,data} 信封与 content/total 分页
- InternalAdminControllerTest: 重写 12 用例，77 项测试全绿

src/test/java/com/yunhai/platform/gateway/admin/InternalAdminControllerTest.java

@@ -15,7 +15,6 @@ import org.springframework.data.domain.Pageable;
 import org.springframework.test.web.servlet.MockMvc;
 import org.springframework.test.web.servlet.setup.MockMvcBuilders;
 
-import java.util.ArrayList;
 import java.util.Arrays;
 
 import static org.mockito.ArgumentMatchers.any;
@@ -30,7 +29,12 @@ import static org.springframework.test.web.servlet.result.MockMvcResultMatchers.
 
 /**
  * 治理小页后端（N02 TDD）：page/routes/targets/logs 查询形态 + 路由/目标行内编辑的
- * 值域闸（非法值 400 且不落库）+ 写后热重载调用。MockMvc standalone + mock 仓储/注册表。
+ * 值域闸（非法值不落库）+ 写后热重载调用。MockMvc standalone + mock 仓储/注册表。
+ * <p>
+ * <b>契约说明（B3/B4 后）</b>：查询接口返回 {@code BasePageResult}（{@code {total, content, ...}}），
+ * 非法入参返回 <b>HTTP 200</b> + {@code {code:2, msg}}（平台规范）。standalone 模式不装配
+ * {@code yh-api-std} 的 {@code ApiResponseAdvice}，故成功响应在本测试中保持裸结构；
+ * 线上由 advice 统一再包一层 {@code {code,msg,data}}（分页体落在 {@code data}）。
  */
 class InternalAdminControllerTest {
 
@@ -51,8 +55,10 @@ class InternalAdminControllerTest {
         controller.setRepos(routeRepo, targetRepo, logRepo, registry);
         mvc = MockMvcBuilders.standaloneSetup(controller).build();
 
-        when(routeRepo.findAll()).thenReturn(new ArrayList<>(Arrays.asList(route(1L))));
-        when(targetRepo.findAll()).thenReturn(new ArrayList<>(Arrays.asList(target(5L))));
+        when(routeRepo.findAll(any(Pageable.class)))
+                .thenReturn(new PageImpl<>(Arrays.asList(route(1L))));
+        when(targetRepo.findAll(any(Pageable.class)))
+                .thenReturn(new PageImpl<>(Arrays.asList(target(5L))));
         when(registry.reload()).thenReturn(22);
         when(registry.reloadTargets()).thenReturn(13);
         when(logRepo.pageLatest(any(), any(), any(Pageable.class)))
@@ -73,8 +79,19 @@ class InternalAdminControllerTest {
     void routes_listSorted() throws Exception {
         mvc.perform(get("/api/internal/admin/routes"))
                 .andExpect(status().isOk())
-                .andExpect(jsonPath("$[0].targetCode").value("userbase"))
-                .andExpect(jsonPath("$[0].pathPattern").value("/oapi/user/**"));
+                .andExpect(jsonPath("$.total").value(1))
+                .andExpect(jsonPath("$.pageIndex").value(1))
+                .andExpect(jsonPath("$.content[0].targetCode").value("userbase"))
+                .andExpect(jsonPath("$.content[0].pathPattern").value("/oapi/user/**"));
+    }
+
+    @Test
+    void targets_paged() throws Exception {
+        mvc.perform(get("/api/internal/admin/targets?pageIndex=1&pageSize=20"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.total").value(1))
+                .andExpect(jsonPath("$.content[0].targetCode").value("notice"));
+        verify(targetRepo).findAll(Mockito.<Pageable>argThat(p -> p.getPageSize() == 20 && p.getPageNumber() == 0));
     }
 
     @Test
@@ -90,34 +107,37 @@ class InternalAdminControllerTest {
     }
 
     @Test
-    void routeUpdate_illegalAuthMode_400AndNoSave() throws Exception {
+    void routeUpdate_illegalAuthMode_bizErrorAndNoSave() throws Exception {
         when(routeRepo.findById(1L)).thenReturn(java.util.Optional.of(route(1L)));
         mvc.perform(put("/api/internal/admin/routes/1")
                         .contentType("application/json")
                         .content("{\"authMode\":\"OPEN\"}"))
-                .andExpect(status().isBadRequest())
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.code").value(2))
                 .andExpect(jsonPath("$.msg").value(org.hamcrest.Matchers.containsString("authMode")));
         verify(routeRepo, never()).save(any());
         verify(registry, never()).reload();
     }
 
     @Test
-    void routeUpdate_negativeTtl_400() throws Exception {
+    void routeUpdate_negativeTtl_bizError() throws Exception {
         when(routeRepo.findById(1L)).thenReturn(java.util.Optional.of(route(1L)));
         mvc.perform(put("/api/internal/admin/routes/1")
                         .contentType("application/json")
                         .content("{\"cacheTtlSeconds\":-1}"))
-                .andExpect(status().isBadRequest());
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.code").value(2));
         verify(routeRepo, never()).save(any());
     }
 
     @Test
-    void routeUpdate_missingRow_400() throws Exception {
+    void routeUpdate_missingRow_bizError() throws Exception {
         when(routeRepo.findById(99L)).thenReturn(java.util.Optional.empty());
         mvc.perform(put("/api/internal/admin/routes/99")
                         .contentType("application/json")
                         .content("{\"enabled\":false}"))
-                .andExpect(status().isBadRequest());
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.code").value(2));
     }
 
     @Test
@@ -133,12 +153,13 @@ class InternalAdminControllerTest {
     }
 
     @Test
-    void targetUpdate_blankBaseUrl_400NoSave() throws Exception {
+    void targetUpdate_blankBaseUrl_bizErrorNoSave() throws Exception {
         when(targetRepo.findById(5L)).thenReturn(java.util.Optional.of(target(5L)));
         mvc.perform(put("/api/internal/admin/targets/5")
                         .contentType("application/json")
                         .content("{\"baseUrl\":\"  \"}"))
-                .andExpect(status().isBadRequest());
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.code").value(2));
         verify(targetRepo, never()).save(any());
     }
 
@@ -147,10 +168,18 @@ class InternalAdminControllerTest {
         mvc.perform(get("/api/internal/admin/logs?targetCode=notice&callerAppKey=100001&limit=10"))
                 .andExpect(status().isOk())
                 .andExpect(jsonPath("$.total").value(1))
-                .andExpect(jsonPath("$.rows[0].targetCode").value("notice"));
+                .andExpect(jsonPath("$.content[0].targetCode").value("notice"));
         verify(logRepo).pageLatest(eq("notice"), eq("100001"), any(Pageable.class));
     }
 
+    @Test
+    void logs_pageIndexAndSize() throws Exception {
+        mvc.perform(get("/api/internal/admin/logs?pageIndex=2&pageSize=20"))
+                .andExpect(status().isOk())
+                .andExpect(jsonPath("$.total").value(1));
+        verify(logRepo).pageLatest(any(), any(), Mockito.argThat(p -> p.getPageSize() == 20 && p.getPageNumber() == 1));
+    }
+
     @Test
     void logs_overLimitCappedTo500() throws Exception {
         mvc.perform(get("/api/internal/admin/logs?limit=9999"))