feat: 账套模式全量接入 — 12个API entity_id统一走token解析链 + 前端登录选公司/切换器重签token

- 后端: kpis/bsc_layers/cash/predict/growth_quality/tax_compliance/data 的 entity_id 参数统一改为 Depends(get_entity_id)
- 前端: 拦截器删除自动附加X-Entity-Id/entity_id; 登录页公司选择器(按用户名授权过滤); 切换器改POST /auth/switch-entity重新签发token+整页刷新; ReportCenter同步改造
- 修复前后端不匹配: login-entities路由→/auth/entities; login响应entity_id取user.entity_id

frontend/src/views/Login.vue

@@ -4,7 +4,17 @@
       <h1>管理会计OS</h1>
       <p class="subtitle">博海网络科技</p>
       <el-form ref="formRef" :model="form" label-width="0" @keyup.enter="handleLogin">
-        <el-form-item><el-input v-model="form.username" placeholder="用户名" size="large" /></el-form-item>
+        <el-form-item>
+          <el-input v-model="form.username" placeholder="用户名" size="large" @input="onUsernameChange" />
+        </el-form-item>
+        <el-form-item>
+          <el-select v-model="form.entity_id" placeholder="选择登录公司" size="large" style="width:100%" :disabled="entities.length === 0">
+            <el-option v-for="e in entities" :key="e.id" :label="e.short_name || e.name" :value="e.id">
+              <span>{{ e.short_name || e.name }}</span>
+              <span style="float:right;color:#999;font-size:12px;">{{ e.name }}</span>
+            </el-option>
+          </el-select>
+        </el-form-item>
         <el-form-item><el-input v-model="form.password" type="password" placeholder="密码" size="large" show-password /></el-form-item>
         <el-form-item><el-button type="primary" size="large" style="width:100%" :loading="loading" @click="handleLogin">登 录</el-button></el-form-item>
       </el-form>
@@ -13,27 +23,53 @@
 </template>
 
 <script setup lang="ts">
-import { ref, reactive } from 'vue'
+import { ref, reactive, onMounted } from 'vue'
 import { useRouter } from 'vue-router'
 import { ElMessage } from 'element-plus'
 import { authApi } from '../api/index'
 
 const router = useRouter()
 const loading = ref(false)
-const form = reactive({ username: 'admin', password: 'admin123' })
+const entities = ref<any[]>([])
+const form = reactive({ username: 'admin', password: 'admin123', entity_id: undefined as number | undefined })
+
+async function loadEntities(username: string) {
+  try {
+    const r: any = await authApi.loginEntities(username)
+    entities.value = r.data || []
+    // 默认选中第一个授权企业
+    if (entities.value.length > 0 && (form.entity_id === undefined || !entities.value.some((e: any) => e.id === form.entity_id))) {
+      form.entity_id = entities.value[0].id
+    }
+  } catch (_) {
+    entities.value = []
+  }
+}
+
+function onUsernameChange(val: string) {
+  if (val && val.trim()) loadEntities(val.trim())
+}
 
 async function handleLogin() {
+  if (form.entity_id === undefined) {
+    ElMessage.warning('请选择登录公司')
+    return
+  }
   loading.value = true
   try {
-    const res: any = await authApi.login(form)
+    const res: any = await authApi.login({ ...form, entity_id: Number(form.entity_id) })
     localStorage.setItem('cma_token', res.token)
     localStorage.setItem('cma_user', JSON.stringify(res.user))
+    localStorage.setItem('cma_entity_id', String(res.user?.entity_id ?? 1))
+    localStorage.setItem('cma_entity_name', res.user?.entity_short_name || res.user?.entity_name || '')
     router.push('/dashboard')
   } catch (e: any) {
     ElMessage.error(e?.response?.data?.detail || '登录失败')
   }
   loading.value = false
 }
+
+onMounted(() => loadEntities(form.username))
 </script>
 
 <style scoped>