diff --git a/src/api/BaseApi.ts b/src/api/BaseApi.ts
index ca374b5..5d4b084 100644
--- a/src/api/BaseApi.ts
+++ b/src/api/BaseApi.ts
@@ -107,18 +107,18 @@ class Base extends Abstract {
     // ===== 消息中心代理（§3.5：经后端签名代理 UserMsg，前端不直连）=====
 
     /**
-     * 消息中心分页列表（{total, list[]}；元素含改写后的绝对 jumpUrl）。
-     * 可选服务端筛选：msgType 0/1/2、appKey、isRead 0/1、keyword 标题/内容模糊。
+     * 消息中心分页列表（{total, list[]}；元素含改写后的绝对 jumpUrl、appId/appName）。
+     * 可选服务端筛选：msgType 0/1/2、appId（注册表应用 id）、isRead 0/1、keyword 标题/内容模糊。
      * @memberof Basic
      */
-    getMsgCenterList(params: PageParams & { msgType?: number; appKey?: string; isRead?: number; keyword?: string }) {
+    getMsgCenterList(params: PageParams & { msgType?: number; appId?: string; isRead?: number; keyword?: string }) {
         const url = path + "/msgCenter/list";
         return this.getRequest<PageData>({ url, params });
     }
 
     /**
-     * 铃铛摘要：未读数 + 各应用待办角标 + 分类计数（sysUnread/bizUnread/approvalUnread/total/readCount，
-     * 旧版 UserMsg 无 summary 端点时这些字段缺省，前端按降级处理）
+     * 铃铛摘要：未读数 + 各应用待办角标 + 分类计数（sysUnread/bizUnread/approvalUnread 为未读口径，
+     * sysTotal/bizTotal/approvalTotal/total/readCount 为总数口径；旧版 UserMsg 无这些端点字段时缺省，前端按降级处理）
      * @memberof Basic
      */
     getMsgCenterSummary() {
@@ -129,18 +129,22 @@ class Base extends Abstract {
             sysUnread?: number;
             bizUnread?: number;
             approvalUnread?: number;
+            sysTotal?: number;
+            bizTotal?: number;
+            approvalTotal?: number;
             total?: number;
             readCount?: number;
         }>({ url });
     }
 
     /**
-     * 消息中心：按来源应用未读数映射（「按应用」清单角标）：{appKey: 未读数}，无未读的 appKey 不出现
+     * 消息中心：按来源应用消息计数（「按应用」清单角标）：[{appId, appName, total, unread}]，
+     * total 含已读；无消息的应用不出现
      * @memberof Basic
      */
-    getMsgCenterUnreadCountByApp() {
-        const url = path + "/msgCenter/unreadCountByApp";
-        return this.getRequest<Record<string, number>>({ url });
+    getMsgCenterCountByApp() {
+        const url = path + "/msgCenter/countByApp";
+        return this.getRequest<{ appId: number | null; appName: string | null; total: number; unread: number }[]>({ url });
     }
 
     /**
diff --git a/src/views/msg/index.vue b/src/views/msg/index.vue
index f6c8f2b..829e613 100644
--- a/src/views/msg/index.vue
+++ b/src/views/msg/index.vue
@@ -23,7 +23,7 @@
                 </div>
             </div>
 
-            <!-- 模式二：按应用（应用清单=GetUserApp 用户应用全集；角标=unreadCountByApp 按应用未读数） -->
+            <!-- 模式二：按应用（应用清单=GetUserApp 用户应用全集；角标=countByApp 消息总数，0 不显示） -->
             <div v-show="mode === 'app'">
                 <div class="side-title">全部应用</div>
                 <div :class="['cat', { active: curApp === 'all' }]" @click="onClickApp('all')">
@@ -32,9 +32,9 @@
                 <div class="side-sep"></div>
                 <div
                     v-for="a in appList"
-                    :key="a.appKey"
-                    :class="['cat', { active: curApp === a.appKey }]"
-                    @click="onClickApp(a.appKey)"
+                    :key="a.appId"
+                    :class="['cat', { active: curApp === String(a.appId) }]"
+                    @click="onClickApp(String(a.appId))"
                 >
                     <span class="dot dot-primary"></span>{{ a.name }}<span class="cnt">{{ a.cnt }}</span>
                 </div>
@@ -129,7 +129,7 @@ interface MsgRow {
     content: string;
     msgType: number; // 0 系统通知 / 1 业务提醒 / 2 审批待办
     appName?: string | null;
-    appKey?: string | null;
+    appId?: number | null; // 注册表应用 id（appKey 不下发前端）
     sendTime?: string; // yyyy-MM-dd HH:mm:ss
     isRead: number; // 1=已读
     jumpUrl?: string | null;
@@ -158,39 +158,40 @@ const loadError = ref(false);
 const hasMore = computed(() => rows.value.length < total.value);
 const refMsgBody = ref<HTMLElement | null>(null);
 
-/** summary 左栏计数（旧版 UserMsg 无 summary 端点时分类字段缺省 → 显示 —） */
-const catCounts = ref<{ sysUnread?: number; bizUnread?: number; approvalUnread?: number; total?: number; readCount?: number }>({});
+/** summary 左栏计数（分类总数口径；旧版 UserMsg 无字段时缺省 → 显示 —） */
+const catCounts = ref<{ sysTotal?: number; bizTotal?: number; approvalTotal?: number; total?: number; readCount?: number }>({});
 const summaryTotalHint = computed(() => (catCounts.value.total == null ? "—" : String(catCounts.value.total)));
 
 function isUnread(m: MsgRow) {
     return m.isRead !== 1;
 }
 
-/** appName 缺失降级：按 appKey 匹配用户应用清单（与桌面网格同源），再退类型标签 */
+/** appName 缺失降级：按 appId 匹配用户应用清单（与桌面网格同源），再退类型标签 */
 function typeAppName(m: MsgRow) {
-    if (m.appKey) {
-        const hit = userApps.value.find(a => a.appKey === String(m.appKey));
+    if (m.appId != null) {
+        const hit = userApps.value.find(a => a.appId === m.appId);
         if (hit && hit.name) return hit.name;
     }
     return typeName(m.msgType);
 }
 
-/** 分类导航（计数走 summary：分类未读数；「已读」= 已读总数） */
+/** 分类导航（计数=分类消息总数含已读，与列表内容对齐；「全部」=全部总数、「已读」=已读总数） */
 const catList = computed(() => [
     { key: "all", name: "全部消息", color: "#5979ea", cnt: catCounts.value.total == null ? "—" : catCounts.value.total },
-    { key: "sys", name: "系统通知", color: "#5979ea", cnt: catCounts.value.sysUnread == null ? "—" : catCounts.value.sysUnread },
-    { key: "biz", name: "业务提醒", color: "#e9b954", cnt: catCounts.value.bizUnread == null ? "—" : catCounts.value.bizUnread },
-    { key: "appr", name: "审批待办", color: "#e8684a", cnt: catCounts.value.approvalUnread == null ? "—" : catCounts.value.approvalUnread },
+    { key: "sys", name: "系统通知", color: "#5979ea", cnt: catCounts.value.sysTotal == null ? "—" : catCounts.value.sysTotal },
+    { key: "biz", name: "业务提醒", color: "#e9b954", cnt: catCounts.value.bizTotal == null ? "—" : catCounts.value.bizTotal },
+    { key: "appr", name: "审批待办", color: "#e8684a", cnt: catCounts.value.approvalTotal == null ? "—" : catCounts.value.approvalTotal },
     { key: "read", name: "已读", color: "#c0c6ce", cnt: catCounts.value.readCount == null ? "—" : catCounts.value.readCount },
 ]);
 
-/** 应用导航：清单=用户应用全集（GetUserApp，BoaApp 自带 appKey/name，与桌面网格同源）；角标=按应用未读数 */
-const userApps = ref<{ appKey: string; name: string }[]>([]);
-const unreadByApp = ref<Record<string, number>>({});
+/** 应用导航：清单=用户应用全集（GetUserApp）；角标=countByApp 按应用消息总数（含已读），0 不显示 */
+const userApps = ref<{ appId: number; name: string }[]>([]);
+const appCountByAppId = ref<Record<number, { total: number; unread: number }>>({});
 const appList = computed(() =>
     userApps.value
-        .map(a => ({ appKey: a.appKey, name: a.name, cnt: unreadByApp.value[a.appKey] || 0 }))
-        .sort((x, y) => y.cnt - x.cnt) // 未读多的排前（稳定排序，同计数保持注册表顺序）
+        .map(a => ({ appId: a.appId, name: a.name, cnt: appCountByAppId.value[a.appId]?.total || 0 }))
+        .filter(a => a.cnt > 0)
+        .sort((x, y) => y.cnt - x.cnt) // 总数多的排前（稳定排序，同计数保持注册表顺序）
 );
 
 /** 应用清单一次拉齐（GetUserApp；失败降级空，不打扰列表） */
@@ -199,8 +200,8 @@ async function loadApps() {
         const groups: any[] = await BaseApi.getUserApp(store.getCurUserId, store.getCurSchId);
         userApps.value = (groups || [])
             .flatMap((g: any) => (g && Array.isArray(g.apps) ? g.apps : []))
-            .filter((a: any) => a && a.appKey != null)
-            .map((a: any) => ({ appKey: String(a.appKey), name: a.name }));
+            .filter((a: any) => a && a.id != null)
+            .map((a: any) => ({ appId: Number(a.id), name: a.name }));
     } catch (e) {
         /* 应用清单失败降级空 */
     }
@@ -213,13 +214,13 @@ const curTitle = computed(() => {
         return hit ? hit.name : "全部消息";
     }
     if (curApp.value === "all") return "全部应用消息";
-    const hit = appList.value.find(a => a.appKey === curApp.value);
+    const hit = appList.value.find(a => String(a.appId) === curApp.value);
     return hit ? hit.name : "全部应用消息";
 });
 
-/** 当前筛选条件 → 服务端参数（筛选语义归服务端，本地不过滤） */
+/** 当前筛选条件 → 服务端参数（筛选语义归服务端，本地不过滤；应用筛选传注册表 appId） */
 function currentParams(extra: { page: number }) {
-    const params: { page: number; count: number; msgType?: number; appKey?: string; isRead?: number; keyword?: string } = {
+    const params: { page: number; count: number; msgType?: number; appId?: string; isRead?: number; keyword?: string } = {
         page: extra.page,
         count: PAGE_SIZE,
     };
@@ -229,7 +230,7 @@ function currentParams(extra: { page: number }) {
         else if (curCat.value === "appr") params.msgType = 2;
         else if (curCat.value === "read") params.isRead = 1;
     } else if (curApp.value !== "all") {
-        params.appKey = curApp.value;
+        params.appId = curApp.value;
     }
     const kw = searchText.value.trim();
     if (kw) params.keyword = kw;
@@ -270,28 +271,28 @@ function onScroll() {
     }
 }
 
-/** 左栏计数一次拉齐（未读总数进 store 与铃铛同源；按应用未读数一并拉取） */
+/** 左栏计数一次拉齐（未读总数进 store 与铃铛同源；按应用消息计数一并拉取） */
 async function loadSummary() {
     try {
         const [s, byApp] = await Promise.all([
             BaseApi.getMsgCenterSummary(),
-            BaseApi.getMsgCenterUnreadCountByApp().catch(() => null),
+            BaseApi.getMsgCenterCountByApp().catch(() => null),
         ]);
         if (s) {
             store.setUnreadCount(s.unreadCount);
             catCounts.value = {
-                sysUnread: (s as any).sysUnread,
-                bizUnread: (s as any).bizUnread,
-                approvalUnread: (s as any).approvalUnread,
+                sysTotal: (s as any).sysTotal,
+                bizTotal: (s as any).bizTotal,
+                approvalTotal: (s as any).approvalTotal,
                 total: (s as any).total,
                 readCount: (s as any).readCount,
             };
         }
-        const map: Record<string, number> = {};
-        if (byApp && typeof byApp === "object") {
-            Object.entries(byApp).forEach(([k, v]) => (map[k] = Number(v) || 0));
-        }
-        unreadByApp.value = map;
+        const map: Record<number, { total: number; unread: number }> = {};
+        ((byApp as any) || []).forEach((e: any) => {
+            if (e && e.appId != null) map[Number(e.appId)] = { total: Number(e.total) || 0, unread: Number(e.unread) || 0 };
+        });
+        appCountByAppId.value = map;
     } catch (e) {
         /* 摘要失败不打扰列表 */
     }