Fix NameError: use require_auth instead of _require_auth on /api/complaint

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

Author: Dennis Braun

app/web.py

@@ -568,7 +568,7 @@ def api_report():
 
 
 @app.route("/api/complaint")
-@_require_auth
+@require_auth
 def api_complaint():
     """Generate ISP complaint letter as text."""
     from .report import generate_complaint_text