PlatformOrder create: add jump to subscriptions link when require_subscription

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

@@ -135,6 +135,29 @@
         </select>
         @if(! $canRenew)
             <small class="muted">提示：续费单必须绑定订阅。请从「订阅管理」列表/详情进入“续费下单”，系统会自动带入订阅ID。</small>
+
+            @php
+                $jumpQuery = [];
+                if ((int) ($defaults['merchant_id'] ?? 0) > 0) {
+                    $jumpQuery['merchant_id'] = (int) ($defaults['merchant_id'] ?? 0);
+                }
+                if ((int) ($defaults['plan_id'] ?? 0) > 0) {
+                    $jumpQuery['plan_id'] = (int) ($defaults['plan_id'] ?? 0);
+                }
+
+                $jumpBase = '/admin/site-subscriptions';
+                if (count($jumpQuery) > 0) {
+                    $jumpBase .= '?' . \Illuminate\Support\Arr::query($jumpQuery);
+                }
+
+                $jumpUrl = \App\Support\BackUrl::withBack($jumpBase, \App\Support\BackUrl::selfWithoutBack());
+            @endphp
+
+            @if(($requireSubscription ?? false) && $jumpUrl)
+                <div class="mt-6 actions">
+                    <a class="btn btn-secondary btn-sm" href="{!! $jumpUrl !!}">去订阅管理选择订阅</a>
+                </div>
+            @endif
         @endif
     </label>