perf: skip processChineseContent for non-Chinese content (open-webui#23162)

Author: Algorithm5838

src/lib/utils/index.ts

@@ -103,6 +103,7 @@ function isChineseChar(char: string): boolean {
 // Tackle "Model output issue not following the standard Markdown/LaTeX format" in Chinese.
 function processChineseContent(content: string): string {
 	// This function is used to process the response content before the response content is rendered.
+	if (!/[\u4e00-\u9fa5]/.test(content)) return content;
 	const lines = content.split('\n');
 	const processedLines = lines.map((line) => {
 		if (/[\u4e00-\u9fa5]/.test(line)) {