🎤 fix: Keep Microphone Icon Visible On Initial Chat Render (#13788)

* 🎤 fix: Keep Microphone Icon Visible On Initial Chat Render

AudioRecorder returned null while the parent ChatForm's textAreaRef was still null on first paint, hiding the mic icon until an unrelated re-render. Render the button disabled instead so the icon is always present.

Closes #13786

* 🎤 refactor: Drop Unused textAreaRef Dependency From AudioRecorder

Per Codex review: deriving the button's disabled state from textAreaRef.current could leave the mic permanently disabled until an unrelated re-render, since assigning a ref does not trigger one. The handlers never read the ref, so remove the dependency entirely along with the now-unused prop.

client/src/components/Chat/Input/AudioRecorder.tsx

@@ -11,13 +11,11 @@ export default memo(function AudioRecorder({
   disabled,
   ask,
   methods,
-  textAreaRef,
   isSubmitting,
 }: {
   disabled: boolean;
   ask: TAskFunction;
   methods: ReturnType<typeof useChatFormContext>;
-  textAreaRef: React.RefObject<HTMLTextAreaElement>;
   isSubmitting: boolean;
 }) {
   const { setValue, reset, getValues } = methods;
@@ -82,10 +80,6 @@ export default memo(function AudioRecorder({
     onTranscriptionComplete,
   );
 
-  if (!textAreaRef.current) {
-    return null;
-  }
-
   const handleStartRecording = async () => {
     existingTextRef.current = getValues('text') || '';
     startRecording();

client/src/components/Chat/Input/ChatForm.tsx

@@ -385,7 +385,6 @@ const ChatForm = memo(function ChatForm({
                 <AudioRecorder
                   methods={methods}
                   ask={submitMessage}
-                  textAreaRef={textAreaRef}
                   disabled={disableInputs || isNotAppendable}
                   isSubmitting={isSubmitting}
                 />