chore: add anonymous logging disclaimer

src/components/chat.tsx

@@ -561,6 +561,10 @@ export function Chat() {
                             )}
                             <span>Enter to send · Shift+Enter for newline</span>
                         </div>
+
+                        <div className="mt-2 text-center text-[11px] leading-4 text-[#71717a]">
+                            Inputs and outputs are logged anonymously for debugging/usage analytics. We do not track who sent messages.
+                        </div>
                     </form>
                 </div>
             </footer>