fix(admin): validate GitHub URL host (#3847)

fix(admin): validate exact GitHub host

Co-authored-by: kiloconnect[bot] <240665456+kiloconnect[bot]@users.noreply.github.com>

Author: kilo-code-bot[bot]

apps/web/src/app/admin/oss/page.tsx

@@ -77,7 +77,7 @@ function extractRepoName(githubUrl: string): string | null {
       url = 'https://' + url;
     }
     const parsed = new URL(url);
-    if (!parsed.hostname.includes('github.com')) {
+    if (!['github.com', 'www.github.com'].includes(parsed.hostname.toLowerCase())) {
       return null;
     }
     const pathParts = parsed.pathname.split('/').filter(Boolean);