fix: replace remaining ReDoS-vulnerable regex in JS minify

Change `\/\/.*$/gm` to `\/\/[^\n]*/g` to avoid backtracking with
`.*` and `$` anchor in multiline mode.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/tools/css-js-prettify-minify/css-js-prettify-minify.vue

@@ -41,7 +41,7 @@ function minifyCss(input: string): string {
 function minifyJs(input: string): string {
   return input
     .replace(/\/\*[\s\S]*?\*\//g, '')
-    .replace(/\/\/.*$/gm, '')
+    .replace(/\/\/[^\n]*/g, '')
     .replace(/\s+/g, ' ')
     .replace(/ ?([{}();,=:+\-*/<>!&|?]) ?/g, '$1')
     .trim();