fix(chat): restore Facebook keyboard avoidance

src/app/chat/components/chat-input-bar.tsx

@@ -4,8 +4,8 @@ import { useRef, useState } from "react";
 import { useChatDispatch } from "@/stores/chat/chat-context";
 import { Logger } from "@/utils/logger";
 
+import { useChatKeyboardAvoidance } from "../hooks/use-chat-keyboard-avoidance";
 import { useChatKeyboardDiagnostics } from "../hooks/use-chat-keyboard-diagnostics";
-import { useChatVirtualKeyboardOverlayExperiment } from "../hooks/use-chat-virtual-keyboard-overlay-experiment";
 import { ChatInputTextField } from "./chat-input-text-field";
 import { ChatSendButton } from "./chat-send-button";
 import styles from "./chat-input-bar.module.css";
@@ -27,7 +27,10 @@ export function ChatInputBar({ disabled = false }: ChatInputBarProps) {
 
   const hasContent = input.trim().length > 0;
 
-  useChatVirtualKeyboardOverlayExperiment();
+  useChatKeyboardAvoidance({
+    active: isFocused,
+    containerRef: barRef,
+  });
   useChatKeyboardDiagnostics({ containerRef: barRef });
 
   const handleInputChange = (value: string) => {