chore: Improve Chat Performance (#35)

* refactor

* optimistically update message list

* fix

* update

* handle duplicate messages

* update ui

* refactor input

* update multi line input

* clean up

crates/ui/src/input/clear_button.rs

@@ -0,0 +1,16 @@
+use gpui::{App, Styled};
+use theme::ActiveTheme;
+
+use crate::{
+    button::{Button, ButtonVariants as _},
+    Icon, IconName, Sizable as _,
+};
+
+#[inline]
+pub(crate) fn clear_button(cx: &App) -> Button {
+    Button::new("clean")
+        .icon(Icon::new(IconName::CloseCircle))
+        .ghost()
+        .xsmall()
+        .text_color(cx.theme().text_muted)
+}