fix: show rolling three month sales headers

resources/views/business/pages/partials/prototype-page.blade.php

@@ -1,5 +1,11 @@
 @php
     $slug = $page['slug'] ?? '';
+    $recentCompletedMonthSalesColumns = collect(range(3, 1))
+        ->map(fn (int $monthsAgo): string => now()
+            ->startOfMonth()
+            ->subMonthsNoOverflow($monthsAgo)
+            ->format('n月销量'))
+        ->all();
     $definitions = [
         'overview' => [
             'title' => '经营总览', 'description' => '跨主体经营、风险与任务的当日视图',
@@ -51,7 +57,7 @@
         ],
         'entity-report' => [
             'title' => '主体维度经营报表', 'description' => '按公司主体汇总店铺经营表现',
-            'columns' => ['市', '主体', '公司类型', 'ERP系统店铺名称', '店铺所属利润中心', '店铺负责人', '部门负责人', '开店时间', '状态', '展示近3个月月度销量', '连续12个月店铺累计销量', '连续12个月主体累计销量', '能否变更主体', '规划', '新主体（变更流程同步新主体）'],
+            'columns' => ['市', '主体', '公司类型', 'ERP系统店铺名称', '店铺所属利润中心', '店铺负责人', '部门负责人', '开店时间', '状态', ...$recentCompletedMonthSalesColumns, '连续12个月店铺累计销量', '连续12个月主体累计销量', '能否变更主体', '规划', '新主体（变更流程同步新主体）'],
             'rows' => [['青岛 / 青岛哲晖义商贸有限公司', '小规模纳税人', '6 家', '华北项目组', '¥962,408', '+8.3%', '关注', '变更'], ['济南 / 济南弈辰电子商务有限公司', '一般纳税人', '3 家', '山东项目组', '¥815,220', '-3.7%', '正常', '保留']],
         ],
         'trademark-progress' => [

tests/Feature/Business/PrototypePageTest.php

@@ -0,0 +1,45 @@
+<?php
+
+namespace Tests\Feature\Business;
+
+use Illuminate\Support\Carbon;
+use Tests\Feature\FeatureTestCase;
+
+class PrototypePageTest extends FeatureTestCase
+{
+    protected function tearDown(): void
+    {
+        Carbon::setTestNow();
+
+        parent::tearDown();
+    }
+
+    public function testEntityReportShowsPreviousThreeCompleteMonthsAsSeparateSalesHeaders(): void
+    {
+        Carbon::setTestNow('2026-08-20 12:00:00');
+
+        $augustResponse = $this->loginAs()->get(route('business.pages.show', [
+            'section' => 'company-management',
+            'page' => 'entity-report',
+        ]));
+
+        $augustResponse
+            ->assertOk()
+            ->assertSeeTextInOrder(['5月销量', '6月销量', '7月销量'])
+            ->assertDontSeeText('8月销量')
+            ->assertDontSeeText('展示近3个月月度销量');
+
+        Carbon::setTestNow('2026-09-01 00:00:00');
+
+        $septemberResponse = $this->get(route('business.pages.show', [
+            'section' => 'company-management',
+            'page' => 'entity-report',
+        ]));
+
+        $septemberResponse
+            ->assertOk()
+            ->assertSeeTextInOrder(['6月销量', '7月销量', '8月销量'])
+            ->assertDontSeeText('5月销量')
+            ->assertDontSeeText('9月销量');
+    }
+}