feat(ui): remove in-app entity switcher, entity fixed at login

- MainLayout/ReportCenter: drop switch-entity switcher, keep read-only entity tag
- KPIList/PredictDashboard/GrowthQuality: entity selectors locked to session entity
- api/index.ts: drop switchEntity/myEntities wrappers (endpoint kept for compat)
- sidebar brand now shows logged-in entity name

(cma-remove-inapp-entity-switcher-20260914)

frontend/src/components/GrowthQuality.vue

@@ -4,12 +4,8 @@
     <div class="gq-header">
       <h3 class="gq-title">📊 增长质量诊断</h3>
       <div class="gq-controls">
-        <el-select v-model="selectedEntityId" placeholder="选择企业" size="small" style="width:160px" @change="loadQuality">
-          <el-option v-for="e in entities" :key="e.id" :label="e.short_name || e.name" :value="e.id" />
-        </el-select>
-        <el-select v-model="compareEntityId" placeholder="对比企业（可选）" size="small" style="width:160px" clearable @change="loadQuality">
-          <el-option v-for="e in entities" :key="e.id" :label="e.short_name || e.name" :value="e.id" />
-        </el-select>
+        <!-- 企业只读标识（不可点）：账套由登录窗口选定，组件内无切换/对比入口 -->
+        <el-tag size="small" type="primary" effect="plain">{{ currentEntityLabel }}</el-tag>
         <el-button size="small" type="primary" @click="loadQuality" :loading="loading">诊断</el-button>
       </div>
     </div>
@@ -58,7 +54,6 @@
         <div class="diag-text">{{ result.diagnosis }}</div>
         <div class="diag-actions">
           <el-button size="small" @click="openDetail('revenueStructure')">查看明细</el-button>
-          <el-button size="small" v-if="!showCompare && entities.length >= 2" @click="enableCompare">双实体对比</el-button>
         </div>
       </div>
 
@@ -100,7 +95,7 @@
     </div>
 
     <!-- 空状态 -->
-    <el-empty v-else-if="!loading" description="请选择企业进行增长质量诊断" />
+    <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">
@@ -140,16 +135,15 @@
 </template>
 
 <script setup lang="ts">
-import { ref, computed, onMounted } from 'vue'
+import { ref, computed } from 'vue'
 import VChart from 'vue-echarts'
 import 'echarts'
-import { predictApi, entityApi } from '../api/index'
+import { predictApi } from '../api/index'
 import { ElMessage } from 'element-plus'
 
 const loading = ref(false)
-const entities = ref<any[]>([])
 const selectedEntityId = ref<number | null>(null)
-const compareEntityId = ref<number | null>(null)
+const compareEntityId = ref<number | null>(null)  // 跨企业对比已下线（登录即定企业），保留占位
 const result = ref<any>(null)
 const compareResult = ref<any>(null)
 const showCompare = ref(false)
@@ -162,6 +156,14 @@ const fallbackEntities = [
   { id: -2, short_name: '陕西博海', name: '陕西博海网络科技' },
 ]
 
+// 实体列表固定为内置演示实体；当前实体跟随登录账套（1=酣客 / 2=博海），组件内不可切换
+const entities = ref<any[]>(fallbackEntities)
+selectedEntityId.value = Number(localStorage.getItem('cma_entity_id') || 1) === 2 ? -2 : -1
+const currentEntityLabel = computed(() => {
+  const e = entities.value.find((x: any) => x.id === selectedEntityId.value)
+  return e ? (e.short_name || e.name) : '当前企业'
+})
+
 // 预设测试数据（酣客 + 博海）
 const testDataMap: Record<number, any> = {
   [-1]: {
@@ -286,24 +288,7 @@ const radarOption = computed(() => {
   }
 })
 
-async function loadEntities() {
-  try {
-    const r = await entityApi.list()
-    if (r?.data?.length) {
-      entities.value = r.data
-      // 如果有数据库实体，尝试预设选择
-      if (!selectedEntityId.value && entities.value.length >= 1) {
-        selectedEntityId.value = entities.value[0].id
-      }
-    } else {
-      entities.value = fallbackEntities
-      selectedEntityId.value = -1
-    }
-  } catch {
-    entities.value = fallbackEntities
-    selectedEntityId.value = -1
-  }
-}
+// ── 实体列表已固定（不再按登录用户拉取可选企业，也不提供切换）──
 
 async function loadQuality() {
   if (!selectedEntityId.value) return
@@ -366,18 +351,6 @@ function openDetail(dimKey: string) {
   showDetail.value = true
 }
 
-function enableCompare() {
-  // 自动选择第一个不同的实体作为对比
-  const other = entities.value.find((e: any) => e.id !== selectedEntityId.value)
-  if (other) {
-    compareEntityId.value = other.id
-    loadQuality()
-  }
-}
-
-onMounted(() => {
-  loadEntities()
-})
 </script>
 
 <style scoped>