refactor(chat): remove keyboard compatibility layer

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

@@ -4,7 +4,7 @@ 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 { ChatInputTextField } from "./chat-input-text-field";
 import { ChatSendButton } from "./chat-send-button";
 import styles from "./chat-input-bar.module.css";
@@ -26,10 +26,7 @@ export function ChatInputBar({ disabled = false }: ChatInputBarProps) {
 
   const hasContent = input.trim().length > 0;
 
-  useChatKeyboardAvoidance({
-    containerRef: barRef,
-    active: isFocused,
-  });
+  useChatKeyboardDiagnostics({ containerRef: barRef });
 
   const handleInputChange = (value: string) => {
     setInput(value);