server : webui : Improve Chat Input with Auto-Sizing Textarea (#12785)

* Update ChatScreen.tsx

* useAutosizeTextarea.ts

useAutosizeTextarea to encapsulate the logic.

* Implement responsive auto-sizing chat textarea

Replaces the manual textarea resizing with an automatic height adjustment based on content.

- `useChatTextarea` hook to manage textarea state and auto-sizing logic via refs, preserving the optimization
- Textarea now grows vertically up to a maximum height (`lg:max-h-48`) on large screens (lg breakpoint and up).
- Disables auto-sizing and enables manual vertical resizing (`resize-vertical`) on smaller screens for better mobile usability.
- Aligns the "Send" button to the bottom of the textarea (`items-end`) for consistent positioning during resize.

* -update compressed index.html.gz after npm run build
-refactor: replace OptimizedTextareaValue with AutosizeTextareaApi in VSCode context hook

* chore: normalize line endings to LF
refactor: AutosizeTextareaApi -> chatTextareaApi

* refactor: Rename interface to PascalCase

---------

Co-authored-by: Xuan Son Nguyen <son@huggingface.co>

examples/server/webui/src/utils/llama-vscode.ts

@@ -1,6 +1,6 @@
 import { useEffect, useState } from 'react';
 import { MessageExtraContext } from './types';
-import { OptimizedTextareaValue } from '../components/ChatScreen';
+import { ChatTextareaApi } from '../components/useChatTextarea.ts';
 
 // Extra context when using llama.cpp WebUI from llama-vscode, inside an iframe
 // Ref: https://github.com/ggml-org/llama.cpp/pull/11940
@@ -15,7 +15,7 @@ interface SetTextEvData {
  * window.postMessage({ command: 'setText', text: 'Spot the syntax error', context: 'def test()\n  return 123' }, '*');
  */
 
-export const useVSCodeContext = (textarea: OptimizedTextareaValue) => {
+export const useVSCodeContext = (textarea: ChatTextareaApi) => {
   const [extraContext, setExtraContext] = useState<MessageExtraContext | null>(
     null
   );