feat(ui): converge 6 page-level entity selectors to read-only session tag

- DataQuality / ProductMatrix / AlertList / ActionPlanLibrary /
  views.GrowthQuality / PredictAccuracy: drop entity el-select
  (including the "all entities" option), show read-only session
  entity tag (not clickable), same style as the top bar tag
- drop page-level entity param from those requests; backend resolves
  entity from the session token (assert_entity_scope / get_entity_id)
- utils/entity.ts: add sessionEntityName() (cma_entity_name else id map)
- P3: ReportCenter header emoji removed; components/GrowthQuality
  detail drill-down el-dialog -> MyDialog

(cma-entity-selectors-converge-6pages-20260914)

frontend/src/views/ActionPlanLibrary.vue

@@ -291,10 +291,8 @@
     <div>
       <div style="margin-bottom:12px;display:flex;gap:8px;align-items:center;">
         <span style="font-weight:500;">COSO内控自检表 — CMA P1内部控制五要素</span>
-        <el-select v-model="cosoEntity" size="small" style="width:160px;" @change="loadCosoChecklist">
-          <el-option label="陕西酣客（白酒经销）" value="hanke" />
-          <el-option label="陕西博海科技（IT服务）" value="bohai" />
-        </el-select>
+        <!-- 企业只读标识（不可点）：账套由登录窗口选定，页内无切换入口 -->
+        <el-tag size="small" type="primary" effect="plain">{{ entityLabel }}</el-tag>
         <el-button size="small" @click="loadCosoChecklist" :loading="cosoLoading">刷新</el-button>
         <el-button v-if="cosoData" type="primary" size="small" style="margin-left:12px;">生成改善行动</el-button>
       </div>
@@ -350,6 +348,7 @@ import { useRoute, useRouter } from 'vue-router'
 import { ElMessage, ElMessageBox } from 'element-plus'
 import { actionPlanApi, kpiApi, userApi, okrApi } from '../api/index'
 import MyDialog from '../components/MyDialog.vue'
+import { sessionEntityName } from '../utils/entity'
 
 const route = useRoute()
 const router = useRouter()
@@ -645,7 +644,8 @@ function statusLabel(status: string) {
 }
 
 // ── COSO内控自检 ──
-const cosoEntity = ref('hanke')
+// 企业只读标识（账套由登录窗口选定，页内无切换入口）
+const entityLabel = ref(sessionEntityName())
 const cosoData = ref<any>(null)
 const cosoLoading = ref(false)
 const cosoExpanded = ref<Record<string, boolean>>({})
@@ -657,7 +657,7 @@ function toggleCosoElement(id: string) {
 async function loadCosoChecklist() {
   cosoLoading.value = true
   try {
-    const r: any = await actionPlanApi.cosoChecklist({ entity: cosoEntity.value })
+    const r: any = await actionPlanApi.cosoChecklist()
     cosoData.value = r
     // 默认展开第一个
     if (r?.elements?.length > 0) {