feat: 插件依赖强制校验 + 文章后台表单/表格注入 hook

- PluginManager: requires 依赖链校验（enable 需依赖已启用，disable 阻止有启用依赖者的插件，boot 跳过依赖未满足插件），all() 输出依赖状态供后台展示
- Plugins 页：卡片显示依赖链徽章，依赖未满足时禁用启用按钮，启停失败弹错误通知
- PostResource: form()/table() 增加 filament.post_form / filament.post_table 注入点
- membership 插件：注入「付费设置」Section（meta.price 单篇价格 + meta.members_only 会员专享）与表格价格/会员列

plugins/neatstudio.membership/src/ServiceProvider.php

@@ -7,6 +7,13 @@ namespace Plugins\Neatstudio\Membership;
 
 use App\Blog\Support\PluginManager;
 use App\Blog\Support\PluginServiceProvider;
+use Filament\Forms\Components\TextInput;
+use Filament\Forms\Components\Toggle;
+use Filament\Schemas\Components\Section;
+use Filament\Schemas\Schema;
+use Filament\Tables\Columns\IconColumn;
+use Filament\Tables\Columns\TextColumn;
+use Filament\Tables\Table;
 use Illuminate\Support\Str;
 use Plugins\Neatstudio\Membership\Models\MembershipPlan;
 use Plugins\Neatstudio\Membership\Models\Subscription;
@@ -75,5 +82,39 @@ class ServiceProvider extends PluginServiceProvider
 
             return $html;
         }, 10);
+
+        // 后台文章表单注入：付费设置（meta.price 单篇价格 + meta.members_only 会员专享）
+        $manager->addAction('filament.post_form', function (Schema $schema) {
+            $schema->components([
+                ...$schema->getComponents(),
+                Section::make('付费设置')
+                    ->description('需启用支付插件并配置支付渠道；0 = 免费')
+                    ->columns(3)
+                    ->collapsible()
+                    ->schema([
+                        TextInput::make('meta.price')
+                            ->label('单篇价格（分）')
+                            ->numeric()
+                            ->minValue(0)
+                            ->default(0)
+                            ->helperText('例：9900 = ¥99；填 0 表示单篇免费'),
+                        Toggle::make('meta.members_only')
+                            ->label('会员专享')
+                            ->helperText('整篇文章仅会员可读'),
+                    ]),
+            ]);
+        });
+
+        // 后台文章表格注入：价格 / 会员列
+        $manager->addAction('filament.post_table', function (Table $table) {
+            $table->pushColumns([
+                TextColumn::make('meta.price')
+                    ->label('单篇价格')
+                    ->formatStateUsing(fn ($state) => $state > 0 ? '¥'.number_format((float) $state / 100, 2) : '—'),
+                IconColumn::make('meta.members_only')
+                    ->label('会员')
+                    ->boolean(),
+            ]);
+        });
     }
 }