diff --git a/src/Core/DBMigrator.php b/src/Core/DBMigrator.php
index 10bf9092..d36ded0d 100644
--- a/src/Core/DBMigrator.php
+++ b/src/Core/DBMigrator.php
@@ -1,43 +1,44 @@
-<?php
-/**
- * @package AKSRT
- */
-
-namespace AKSRT\Core;
-
-defined('ABSPATH') || exit;
-
-class DBMigrator {
-    use DBMigratorPart2;
-    use DBMigratorPart3;
-    use DBMigratorIdentity;
-    use DBMigratorVip;
-
-    /** Current schema version; changing it re-runs dbDelta. */
-    // 2.5.1: order_aftersale 新增 images 列（售后举证图片）。dbDelta 仅在版本变化时
-    // 重跑，新增/调整列必须同步升版本，否则老安装不会执行 ALTER TABLE。
-    const SCHEMA_VERSION = '2.5.1';
-
-    const OPT_KEY = 'aksrt_db_schema_version';
-
-    /**
-     * Register hooks.
-     */
-    public static function init(): void {
-        add_action('after_switch_theme', [self::class, 'maybe_migrate']);
-        add_action('admin_init', [self::class, 'maybe_migrate']);
-    }
-
-    /**
-     * Run table schema upgrade when version mismatches.
-     */
-    public static function maybe_migrate(): void {
-        $current = get_option(self::OPT_KEY, '');
-        if ($current === self::SCHEMA_VERSION) {
-            return;
-        }
-
-        self::run();
-        update_option(self::OPT_KEY, self::SCHEMA_VERSION);
-    }
-}
+<?php
+/**
+ * @package AKSRT
+ */
+
+namespace AKSRT\Core;
+
+defined('ABSPATH') || exit;
+
+class DBMigrator {
+    use DBMigratorPart2;
+    use DBMigratorPart3;
+    use DBMigratorIdentity;
+    use DBMigratorVip;
+
+    /** Current schema version; changing it re-runs dbDelta. */
+    // 2.5.1: order_aftersale 新增 images 列（售后举证图片）。dbDelta 仅在版本变化时
+    // 重跑，新增/调整列必须同步升版本，否则老安装不会执行 ALTER TABLE。
+    // 2.5.2: order_aftersale 新增 apply_form 列（结构化申请表单：预置原因 / 申请资料 / 申请说明）。
+    const SCHEMA_VERSION = '2.5.2';
+
+    const OPT_KEY = 'aksrt_db_schema_version';
+
+    /**
+     * Register hooks.
+     */
+    public static function init(): void {
+        add_action('after_switch_theme', [self::class, 'maybe_migrate']);
+        add_action('admin_init', [self::class, 'maybe_migrate']);
+    }
+
+    /**
+     * Run table schema upgrade when version mismatches.
+     */
+    public static function maybe_migrate(): void {
+        $current = get_option(self::OPT_KEY, '');
+        if ($current === self::SCHEMA_VERSION) {
+            return;
+        }
+
+        self::run();
+        update_option(self::OPT_KEY, self::SCHEMA_VERSION);
+    }
+}