✨ feat: 添加文档标题规范化功能和优化文档显示逻辑

web/docs.php

@@ -3,6 +3,15 @@ require_once('./include/db_info.inc.php');
 require_once('./include/setlang.php');
 require_once('./include/const.inc.php');
 
+function normalize_doc_title($text) {
+    $text = trim((string)$text);
+    $text = preg_replace('/[\s\p{P}\p{S}]+/u', '', $text);
+    if (function_exists('mb_strtolower')) {
+        return mb_strtolower($text, 'UTF-8');
+    }
+    return strtolower($text);
+}
+
 $docs_dir = __DIR__ . '/doc';
 $doc_entries = array();
 
@@ -30,6 +39,7 @@ if (empty($selected_file) && !empty($doc_entries)) {
 
 $selected_title = '文档';
 $selected_markdown = '';
+$show_selected_title = true;
 
 if (!empty($selected_file)) {
     $selected_path = realpath($docs_dir . DIRECTORY_SEPARATOR . $selected_file);
@@ -49,6 +59,9 @@ if (!empty($selected_file)) {
             $selected_markdown = preg_replace('/^\xEF\xBB\xBF/', '', $selected_markdown);
         }
         $selected_title = preg_replace('/\.md$/i', '', basename($selected_path));
+        if (preg_match('/^\s*#\s+(.+)$/mu', $selected_markdown, $heading_match)) {
+            $show_selected_title = normalize_doc_title($heading_match[1]) !== normalize_doc_title($selected_title);
+        }
     }
 }