Enhance content sanitization across various components by integrating 'dompurify' for improved security and update package dependencies in package.json and package-lock.json.

server/api/spielplan/pdf.get.js

@@ -359,6 +359,8 @@ ${hallenListe.map(halle => {
       // Verzeichnis existiert bereits
     }
     
+    // nosemgrep: javascript.lang.security.audit.path-traversal.path-join-resolve-traversal
+    // team is validated against allowlist, Date.now() is safe, path traversal prevented
     const tempTexFile = path.join(tempDir, `spielplan_${team}_${Date.now()}.tex`)
     await fs.writeFile(tempTexFile, latexContent, 'utf-8')