fix: ensure apidoc uses utf-8 text

nginx.conf

@@ -13,7 +13,8 @@ server {
 
     # Markdown 接口说明，直接返回文本内容
     location = /apidoc {
-        default_type text/markdown;
+        types { }
+        default_type text/plain;
         charset utf-8;
         try_files /apidoc =404;
         add_header Cache-Control "no-store";

scripts/generate-api.mjs

@@ -37,7 +37,8 @@ function writeTextFile(target, content) {
 function copyApiDoc() {
   const source = path.join(rootDir, 'docs', '知识库API接口说明.md')
   const content = fs.readFileSync(source, 'utf8')
-  writeTextFile(apiDocPath, content)
+  // /apidoc 是无扩展名文本接口；写入 UTF-8 BOM，避免部分静态服务器或浏览器按非 UTF-8 猜测导致中文乱码。
+  writeTextFile(apiDocPath, `\uFEFF${content}`)
 }
 
 function extractConstArrayFromTs(filePath, constName) {