feat(admin-ui): 平台订单筛选区可折叠并记忆状态

public/css/admin-components.css

@@ -108,6 +108,24 @@
     line-height:1.5;
 }
 
+/* 可复用：折叠面板（参考 Ant Design Pro 的筛选区交互：可折叠、摘要做成一条可点 Header） */
+.collapsible > summary{
+    list-style:none;
+    cursor:pointer;
+}
+
+.collapsible > summary::-webkit-details-marker{
+    display:none;
+}
+
+.collapsible-summary{
+    user-select:none;
+}
+
+.collapsible-body{
+    margin-top:10px;
+}
+
 /* 平台订单：工具区（两列分组卡片化，避免表单散落） */
 .tool-grid{
     display:grid;

public/js/admin.js

@@ -43,6 +43,37 @@
         });
     })();
 
+    // 通用：折叠面板（collapsible）记忆展开状态（localStorage）
+    // 用法：<details data-role="collapsible" data-storage-key="xxx">
+    (function () {
+        var nodes = document.querySelectorAll('details[data-role="collapsible"][data-storage-key]');
+        if (!nodes || nodes.length === 0) {
+            return;
+        }
+
+        nodes.forEach(function (d) {
+            var key = d.getAttribute('data-storage-key');
+            if (!key) {
+                return;
+            }
+
+            try {
+                var saved = window.localStorage.getItem(key);
+                if (saved === 'open') {
+                    d.open = true;
+                } else if (saved === 'closed') {
+                    d.open = false;
+                }
+            } catch (e) {}
+
+            d.addEventListener('toggle', function () {
+                try {
+                    window.localStorage.setItem(key, d.open ? 'open' : 'closed');
+                } catch (e) {}
+            });
+        });
+    })();
+
     // 通用：将后端 flash 信息同步到 toast（更像 Ant Design Pro 的反馈方式）
     // 说明：渐进增强。页面仍保留原本的提示块，不依赖 JS。
     (function () {

resources/views/admin/platform_orders/index.blade.php

@@ -295,8 +295,14 @@
     </div>
 </div>
 
-<div class="card mb-20">
+<details class="card mb-20 collapsible" data-role="collapsible" data-storage-key="admin.platform_orders.filters" open>
-    <h3>筛选条件</h3>
+    <summary class="collapsible-summary">
+        <div class="flex-between items-center">
+            <h3 class="mb-0">筛选条件</h3>
+            <span class="muted muted-xs">点击收起/展开</span>
+        </div>
+    </summary>
+    <div class="collapsible-body">
         <form method="get" action="/admin/platform-orders" class="grid-3">
         @if($safeBackForLinks !== '')
             <input type="hidden" name="back" value="{!! $safeBackForLinks !!}">
@@ -391,7 +397,8 @@
             <button class="btn btn-sm" type="submit">应用筛选</button>
         </div>
     </form>
-</div>
+    </div>
+</details>
 
 <div class="grid-3 mb-20">
     <div class="card">

tests/Feature/AdminPlatformOrderIndexFilterPanelShouldBeCollapsibleTest.php

@@ -0,0 +1,36 @@
+<?php
+
+namespace Tests\Feature;
+
+use Illuminate\Foundation\Testing\RefreshDatabase;
+use Tests\TestCase;
+
+class AdminPlatformOrderIndexFilterPanelShouldBeCollapsibleTest extends TestCase
+{
+    use RefreshDatabase;
+
+    protected function loginAsPlatformAdmin(): void
+    {
+        $this->seed();
+
+        $this->post('/admin/login', [
+            'email' => 'platform.admin@demo.local',
+            'password' => 'Platform@123456',
+        ])->assertRedirect('/admin');
+    }
+
+    public function test_index_filter_panel_should_be_collapsible(): void
+    {
+        $this->loginAsPlatformAdmin();
+
+        $res = $this->get('/admin/platform-orders');
+        $res->assertOk();
+
+        $html = (string) $res->getContent();
+
+        $this->assertStringContainsString('data-role="collapsible"', $html);
+        $this->assertStringContainsString('data-storage-key="admin.platform_orders.filters"', $html);
+        $this->assertStringContainsString('<summary', $html);
+        $this->assertStringContainsString('筛选条件', $html);
+    }
+}