fix(user): show IP city on home/center and force /user + profile templates

inc/modules/user-parts/template-registry.php

@@ -488,8 +488,16 @@ function aksrt_ensure_template_page(string $key): void {
     $cfg = $_aksrt_special_templates[$key];
     $desired_slug = sanitize_title($cfg['slug'] ?? $key);
 
-    // 已有页面使用此模板？
-    if (aksrt_find_template_page($cfg['file'])) return;
+    // 已有页面使用此模板？仍校验模板 meta，避免空白默认页。
+    $found_page = aksrt_find_template_page($cfg['file']);
+    if ($found_page instanceof WP_Post) {
+        $current_tpl = get_post_meta((int) $found_page->ID, '_wp_page_template', true);
+        if ($current_tpl !== $cfg['file']) {
+            update_post_meta((int) $found_page->ID, '_wp_page_template', $cfg['file']);
+            aksrt_clear_template_page_cache();
+        }
+        return;
+    }
 
     if ($desired_slug !== '') {
         $existing_page = get_page_by_path($desired_slug, OBJECT, 'page');