Add no-trailing-slash route to AIAccessibility

AIAccessibility/app/main.py

@@ -125,6 +125,12 @@ def index() -> FileResponse:
     base = os.path.dirname(__file__)
     return FileResponse(os.path.join(base, "static", "index.html"))
 
+@router.get("")
+def index_no_slash() -> FileResponse:
+    """Serve the Accessibility Checker page (no trailing slash)."""
+    base = os.path.dirname(__file__)
+    return FileResponse(os.path.join(base, "static", "index.html"))
+
 @router.get("/health")
 def health() -> dict:
     return {"status":"ok","openai_key": bool(os.getenv("OPENAI_API_KEY")), "model": os.getenv("OPENAI_MODEL","gpt-4o-mini")}