进行了一些小优化

src/User/Center.php

@@ -188,11 +188,11 @@ class Center {
                 'priority' => 55,
                 'type'     => 'panel',
             ],
-            'notif' => [
+            'msg' => [
                 'label'    => __('消息通知', 'aksrt'),
                 'icon'     => 'bell',
                 'priority' => 60,
-                'type'     => 'link',
+                'type'     => 'panel',
             ],
             'auth' => [
                 'label'    => __('官方认证', 'aksrt'),
@@ -307,6 +307,9 @@ class Center {
         if (!in_array('settings', $order, true)) {
             $order[] = 'settings';
         }
+        if (!in_array('msg', $order, true)) {
+            $order[] = 'msg';
+        }
 
         foreach ($order as $key) {
             if (!isset($definitions[$key])) {
@@ -339,9 +342,6 @@ class Center {
             $this->panels[$key] = $panel;
         }
 
-        // Notif is a link entry (messages page), not a dashboard panel body.
-        $this->panels['notif'] = $definitions['notif'];
-
         // Keep stable order by priority.
         uasort($this->panels, static function (array $a, array $b): int {
             return ((int) ($a['priority'] ?? 100)) <=> ((int) ($b['priority'] ?? 100));

src/User/NotificationPreferences.php

@@ -0,0 +1,135 @@
+<?php
+/**
+ * User notification category preferences and REST persistence.
+ *
+ * @package AKSRT
+ */
+
+namespace AKSRT\User;
+
+defined('ABSPATH') || exit;
+
+final class NotificationPreferences {
+	private const META_KEY = 'aksrt_notification_preferences';
+
+	private const CATEGORIES = ['posts', 'like', 'system'];
+
+	public static function init(): void {
+		add_action('rest_api_init', [self::class, 'register_rest_route']);
+	}
+
+	public static function register_rest_route(): void {
+		register_rest_route('aksrt/v1', '/user/notification-preferences', [
+			'methods'             => \WP_REST_Server::CREATABLE,
+			'callback'            => [self::class, 'save'],
+			'permission_callback' => static function (): bool {
+				return get_current_user_id() > 0 && current_user_can('read');
+			},
+			'args'                => [
+				'preferences' => [
+					'type'              => 'object',
+					'required'          => true,
+					'properties'        => [
+						'posts'  => ['type' => 'boolean', 'required' => true],
+						'like'   => ['type' => 'boolean', 'required' => true],
+						'system' => ['type' => 'boolean', 'required' => true],
+					],
+					'additionalProperties' => false,
+					'validate_callback' => [self::class, 'validate_preferences'],
+					'sanitize_callback' => [self::class, 'sanitize_preferences'],
+				],
+			],
+		]);
+	}
+
+	/** @return array{posts:bool,like:bool,system:bool} */
+	public static function get(int $user_id): array {
+		$defaults = array_fill_keys(self::CATEGORIES, true);
+		$stored = get_user_meta($user_id, self::META_KEY, true);
+		if (!is_array($stored)) {
+			return $defaults;
+		}
+
+		foreach (self::CATEGORIES as $category) {
+			if (array_key_exists($category, $stored)) {
+				$defaults[$category] = (bool) $stored[$category];
+			}
+		}
+		return $defaults;
+	}
+
+	public static function allows(int $user_id, string $notification_type): bool {
+		if ($user_id <= 0) {
+			return false;
+		}
+		$preferences = self::get($user_id);
+		return $preferences[self::category_for_type($notification_type)];
+	}
+
+	public static function category_for_type(string $notification_type): string {
+		$type = sanitize_key($notification_type);
+		if (
+			in_array($type, ['posts', 'post', 'comment', 'favorite', 'pending_comments'], true)
+			|| str_starts_with($type, 'post_')
+			|| str_starts_with($type, 'comment_')
+			|| str_starts_with($type, 'favorite_')
+		) {
+			return 'posts';
+		}
+		if (
+			in_array($type, ['like', 'follow', 'followed', 'hot'], true)
+			|| str_starts_with($type, 'like_')
+			|| str_starts_with($type, 'follow_')
+			|| str_starts_with($type, 'followed_')
+		) {
+			return 'like';
+		}
+		return 'system';
+	}
+
+	public static function validate_preferences($value): bool {
+		if (
+			!is_array($value)
+			|| count($value) !== count(self::CATEGORIES)
+			|| array_diff(array_keys($value), self::CATEGORIES)
+			|| array_diff(self::CATEGORIES, array_keys($value))
+		) {
+			return false;
+		}
+		foreach (self::CATEGORIES as $category) {
+			if (!is_bool($value[$category])) {
+				return false;
+			}
+		}
+		return true;
+	}
+
+	/** @return array{posts:bool,like:bool,system:bool} */
+	public static function sanitize_preferences($value): array {
+		$value = is_array($value) ? $value : [];
+		return [
+			'posts'  => (bool) ($value['posts'] ?? false),
+			'like'   => (bool) ($value['like'] ?? false),
+			'system' => (bool) ($value['system'] ?? false),
+		];
+	}
+
+	public static function save(\WP_REST_Request $request) {
+		$user_id = get_current_user_id();
+		if ($user_id <= 0) {
+			return new \WP_Error('aksrt_notification_preferences_auth', __('请先登录', 'aksrt'), ['status' => 401]);
+		}
+
+		$preferences = self::sanitize_preferences($request->get_param('preferences'));
+		$result = update_user_meta($user_id, self::META_KEY, $preferences);
+		if ($result === false && self::get($user_id) !== $preferences) {
+			return new \WP_Error('aksrt_notification_preferences_save', __('消息通知设置保存失败', 'aksrt'), ['status' => 500]);
+		}
+
+		return rest_ensure_response([
+			'success'     => true,
+			'message'     => __('消息通知设置已保存', 'aksrt'),
+			'preferences' => $preferences,
+		]);
+	}
+}