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/ReportCenter.vue

@@ -2,7 +2,7 @@
   <div class="report-page">
     <!-- 顶部 -->
     <div class="report-header">
-      <h3 class="page-title">📊 CMA管理报表</h3>
+      <h3 class="page-title">CMA管理报表</h3>
       <div class="header-right">
         <!-- 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" class="entity-tag">{{ currentEntityNameTag }}</el-tag>
@@ -16,7 +16,7 @@
           @change="onPeriodChange"
         />
         <el-button text size="small" :loading="loading" @click="loadAll">刷新</el-button>
-        <el-button type="primary" size="small" @click="openDupont">📊 杜邦分析</el-button>
+        <el-button type="primary" size="small" @click="openDupont">杜邦分析</el-button>
         <el-button type="success" size="small" @click="openSubjectManage">📋 科目打标</el-button>
       </div>
     </div>