fix(badges): hide "我的徽章" button until user has visible badges

profile-header.php was rendering two badge buttons ("我的徽章"
opening the local modal and "徽章弹层" opening a remote modal).
Drop the remote one and gate the local one behind the new
aksrt_user_has_visible_badges() helper, which only returns true
when the user actually has at least one badge entry that exists
in the active catalog dictionary — preventing a useless empty
modal when nothing can be shown.

inc/helpers/aksrt-identity.php

@@ -229,6 +229,38 @@ if (!function_exists('aksrt_get_user_name')) {
 	}
 }
 
+if (!function_exists('aksrt_user_has_visible_badges')) {
+	/**
+	 * Whether a user owns at least one badge that exists in the current catalog.
+	 *
+	 * Used by user-center surfaces to decide whether to show the "我的徽章"
+	 * button. Prevents rendering a button that opens an empty modal when the
+	 * badge dictionary has no entries or none of the user's badges match it.
+	 *
+	 * @param int $user_id Target user (0 = current user).
+	 * @return bool
+	 */
+	function aksrt_user_has_visible_badges(int $user_id = 0): bool {
+		if ($user_id <= 0) {
+			$user_id = get_current_user_id();
+		}
+		if ($user_id <= 0 || !class_exists('AKSRT\\User\\Badges')) {
+			return false;
+		}
+		$map = \AKSRT\User\Badges::get_dictionary_map();
+		if (empty($map)) {
+			return false;
+		}
+		$owned = \AKSRT\User\Badges::get_owned($user_id);
+		foreach ((array) $owned as $slug) {
+			if (is_string($slug) && $slug !== '' && isset($map[$slug])) {
+				return true;
+			}
+		}
+		return false;
+	}
+}
+
 if (!function_exists('aksrt_get_worn_medal_icon')) {
 	/**
 	 * Render the worn medal icon HTML for a user (standalone, zibll parity).