feat(platform-orders): 支持退款留痕与支付状态自动推进（meta.refund_receipts）

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

@@ -87,6 +87,7 @@
     $activationError = data_get($order->meta, 'subscription_activation_error');
     $audit = (array) (data_get($order->meta, 'audit', []) ?? []);
     $paymentReceipts = (array) (data_get($order->meta, 'payment_receipts', []) ?? []);
+    $refundReceipts = (array) (data_get($order->meta, 'refund_receipts', []) ?? []);
 @endphp
 
 @php
@@ -166,6 +167,64 @@
     </details>
 </div>
 
+<div class="card mb-20">
+    <h3>退款记录（退款轨迹留痕）</h3>
+    <p class="muted muted-tight">用于记录退款动作与对账轨迹（先落 meta，不引入独立表）。追加退款后，系统会自动把支付状态推进为“部分退款/已退款”（仅在订单当前为已支付时）。</p>
+
+    @if(count($refundReceipts) > 0)
+        @php $items = array_slice(array_reverse($refundReceipts), 0, 20); @endphp
+        <table>
+            <thead>
+            <tr>
+                <th style="width:140px;">类型</th>
+                <th style="width:120px;">渠道</th>
+                <th style="width:120px;">金额</th>
+                <th style="width:200px;">退款时间</th>
+                <th style="width:160px;">记录时间</th>
+                <th style="width:100px;">管理员</th>
+                <th>备注</th>
+            </tr>
+            </thead>
+            <tbody>
+            @foreach($items as $r)
+                <tr>
+                    <td>{{ data_get($r, 'type') ?: '-' }}</td>
+                    <td>{{ data_get($r, 'channel') ?: '-' }}</td>
+                    <td>¥{{ number_format((float) (data_get($r, 'amount') ?? 0), 2) }}</td>
+                    <td>{{ data_get($r, 'refunded_at') ?: '-' }}</td>
+                    <td>{{ data_get($r, 'created_at') ?: '-' }}</td>
+                    <td>{{ data_get($r, 'admin_id') ?: '-' }}</td>
+                    <td class="muted">{{ data_get($r, 'note') ?: '' }}</td>
+                </tr>
+            @endforeach
+            </tbody>
+        </table>
+    @else
+        <p class="muted">暂无退款记录。</p>
+    @endif
+
+    <details style="margin-top:12px;">
+        <summary class="muted">追加一条退款记录（会自动推进支付状态）</summary>
+        <form method="post" action="/admin/platform-orders/{{ $order->id }}/add-refund-receipt" style="margin-top:10px;" onsubmit="return confirm('确认追加退款记录？该操作会写入退款轨迹，并可能推进支付状态为部分退款/已退款');">
+            @csrf
+            <div class="grid-3">
+                <input type="text" name="type" placeholder="类型：refund/chargeback/手工退款等" value="refund">
+                <input type="text" name="channel" placeholder="渠道（可选）" value="{{ (string) ($order->payment_channel ?? '') }}">
+                <input type="number" step="0.01" name="amount" placeholder="金额" value="0.00">
+            </div>
+            <div style="margin-top:10px;">
+                <input type="text" name="refunded_at" placeholder="退款时间：YYYY-mm-dd HH:ii:ss（可选）" value="{{ optional($order->refunded_at)->format('Y-m-d H:i:s') }}">
+            </div>
+            <div style="margin-top:10px;">
+                <textarea name="note" placeholder="备注（可选，用于退款说明/对账）" rows="3" style="width:100%;"></textarea>
+            </div>
+            <div style="margin-top:10px;">
+                <button type="submit">追加退款记录</button>
+            </div>
+        </form>
+    </details>
+</div>
+
 <div class="card mb-20">
     <h3>订阅同步记录</h3>
     @if($activation)