fix: #2087 chat box font size use global config

app/components/chat.tsx

@@ -927,6 +927,9 @@ export function Chat() {
             onBlur={() => setAutoScroll(false)}
             rows={inputRows}
             autoFocus={autoFocus}
+            style={{
+              fontSize: config.fontSize,
+            }}
           />
           <IconButton
             icon={<SendWhiteIcon />}