M5: Workerman 常驻服务 + AI 审核/润色插件 + 支付插件（支付宝/微信/沙箱）+ 会员插件（套餐/订阅/付费文章）

plugins/neatstudio.membership/src/Models/MembershipPlan.php

@@ -0,0 +1,23 @@
+<?php
+
+namespace Plugins\Neatstudio\Membership\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\HasMany;
+
+class MembershipPlan extends Model
+{
+    protected $fillable = [
+        'name', 'slug', 'description', 'price', 'duration_days', 'permissions', 'active', 'sort',
+    ];
+
+    protected $casts = [
+        'permissions' => 'array',
+        'active' => 'boolean',
+    ];
+
+    public function subscriptions(): HasMany
+    {
+        return $this->hasMany(Subscription::class);
+    }
+}

plugins/neatstudio.membership/src/Models/Subscription.php

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+<?php
+
+namespace Plugins\Neatstudio\Membership\Models;
+
+use App\Models\User;
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+class Subscription extends Model
+{
+    protected $fillable = [
+        'user_id', 'membership_plan_id', 'status', 'starts_at', 'ends_at',
+    ];
+
+    protected $casts = [
+        'starts_at' => 'datetime',
+        'ends_at' => 'datetime',
+    ];
+
+    public function user(): BelongsTo
+    {
+        return $this->belongsTo(User::class);
+    }
+
+    public function plan(): BelongsTo
+    {
+        return $this->belongsTo(MembershipPlan::class, 'membership_plan_id');
+    }
+
+    public function isActive(): bool
+    {
+        return $this->status === 'active' && $this->ends_at && $this->ends_at->isFuture();
+    }
+}