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/components/GrowthQuality.vue

@@ -98,7 +98,7 @@
     <el-empty v-else-if="!loading" description="点击「诊断」查看当前账套增长质量" />
 
     <!-- 明细下钻弹窗 -->
-    <el-dialog v-model="showDetail" :title="currentDimLabel + ' — ' + (result?.entity_name || '')" width="550px">
+    <MyDialog v-model="showDetail" :title="currentDimLabel + ' — ' + (result?.entity_name || '')" :width="550">
       <template v-if="currentDimKey && result?.detail?.[currentDimKey]">
         <div class="detail-header">
           <span class="detail-score-badge" :class="scoreClass(result.detail[currentDimKey].score)">
@@ -130,7 +130,7 @@
           </div>
         </div>
       </template>
-    </el-dialog>
+    </MyDialog>
   </div>
 </template>
 
@@ -139,6 +139,7 @@ import { ref, computed } from 'vue'
 import VChart from 'vue-echarts'
 import 'echarts'
 import { predictApi } from '../api/index'
+import MyDialog from './MyDialog.vue'
 import { ElMessage } from 'element-plus'
 
 const loading = ref(false)