Fix cursor focus and selection in input box, add AWS env var warning box, and remove AWS Bedrock login banner

app/src/code/signature_help.rs

@@ -16,7 +16,9 @@ use super::local_code_editor::LocalCodeEditorView;
 const SIGNATURE_HELP_MAX_WIDTH: f32 = 500.;
 
 /// State for signature help display.
+#[derive(Default)]
 pub(super) enum SignatureHelpState {
+    #[default]
     None,
     Loading(Option<AbortHandle>),
     Showing {
@@ -25,12 +27,6 @@ pub(super) enum SignatureHelpState {
     },
 }
 
-impl Default for SignatureHelpState {
-    fn default() -> Self {
-        Self::None
-    }
-}
-
 impl SignatureHelpState {
     pub fn clear(&mut self) -> bool {
         if matches!(self, Self::None) {
@@ -73,10 +69,8 @@ impl LocalCodeEditorView {
             Some('(') | Some(',') => {
                 self.request_signature_help(cursor_offset, ctx);
             }
-            Some(')') => {
-                if self.signature_help_state.clear() {
-                    ctx.notify();
-                }
+            Some(')') if self.signature_help_state.clear() => {
+                ctx.notify();
             }
             _ => {}
         }