feat: 彻底禁用 Flarum 邮件通知

- 从驱动层移除 EmailNotificationDriver，禁止所有邮件通知发送
- 新用户注册时自动关闭邮件通知偏好兜底
- 站点通知保持不变

LICENSE

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+MIT License
+
+Copyright (c) 2025 MetaLab
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

composer.json

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+{
+    "name": "metazone/disable-email-notifications",
+    "description": "彻底禁用 Flarum 邮件通知——从驱动层移除 EmailNotificationDriver，保留站点通知不受影响。",
+    "type": "flarum-extension",
+    "license": "MIT",
+    "require": {
+        "flarum/core": "^1.0"
+    },
+    "autoload": {
+        "psr-4": {
+            "MetaZone\\DisableEmailNotifications\\": "src/"
+        }
+    },
+    "extra": {
+        "flarum-extension": {
+            "title": "Disable Email Notifications",
+            "icon": {
+                "name": "fas fa-envelope",
+                "backgroundColor": "#e74c3c",
+                "color": "#fff"
+            }
+        }
+    }
+}

extend.php

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+<?php
+
+namespace MetaZone\DisableEmailNotifications;
+
+use Flarum\Extend;
+use Flarum\User\Event\Registered;
+use MetaZone\DisableEmailNotifications\Listener\DisableEmailNotificationsListener;
+
+return [
+    (new Extend\Event)
+        ->listen(Registered::class, DisableEmailNotificationsListener::class),
+
+    // 从驱动层彻底移除邮件通知，不依赖偏好设置
+    new RemoveEmailDriver(),
+];

src/Listener/DisableEmailNotificationsListener.php

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+<?php
+
+namespace MetaZone\DisableEmailNotifications\Listener;
+
+use Illuminate\Contracts\Container\Container;
+use Flarum\User\Event\Registered;
+use Flarum\User\User;
+
+class DisableEmailNotificationsListener
+{
+    public function __construct(
+        protected Container $container,
+    ) {
+    }
+
+    public function handle(Registered $event): void
+    {
+        $user = $event->user;
+
+        try {
+            // 从容器中获取所有已注册的通知类型（懒加载，make 会触发首次解析）
+            // flarum.notification.blueprints 格式: [BlueprintClass => ['alert', 'email'], ...]
+            $blueprints = $this->container->make('flarum.notification.blueprints');
+
+            foreach ($blueprints as $blueprintClass => $driversEnabledByDefault) {
+                // 只处理支持邮件通知的类型
+                if (!in_array('email', $driversEnabledByDefault)) {
+                    continue;
+                }
+
+                // 防御：跳过无法获取类型的 blueprint
+                if (!is_callable([$blueprintClass, 'getType'])) {
+                    continue;
+                }
+
+                $type = $blueprintClass::getType();
+                $key = User::getNotificationPreferenceKey($type, 'email');
+                $user->setPreference($key, false);
+            }
+
+            $user->save();
+        } catch (\Throwable $e) {
+            // 监听器内部错误不应阻断用户注册流程
+        }
+    }
+}

src/RemoveEmailDriver.php

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+<?php
+
+namespace MetaZone\DisableEmailNotifications;
+
+use Flarum\Extend\ExtenderInterface;
+use Flarum\Extension\Extension;
+use Illuminate\Contracts\Container\Container;
+
+class RemoveEmailDriver implements ExtenderInterface
+{
+    public function extend(Container $container, Extension $extension = null): void
+    {
+        $container->extend('flarum.notification.drivers', function (array $drivers) {
+            unset($drivers['email']);
+            return $drivers;
+        });
+    }
+}