Refine tool call summaries and scrolling (#2069)

* feat(app): refine tool call summaries and scrolling

Keep summary groups stable from the first tool call, preserve live activity feedback, and scroll expanded groups to the latest entry. Consolidate web scrollbar styling around the native browser mechanism.

* refactor(app): reuse tool call height constant

* fix(app): preserve tool call summary state

* fix(app): refresh web tool groups on expand

* fix(app): preserve grouped tool errors

packages/app/src/screens/settings/appearance/appearance-section.tsx

@@ -214,9 +214,8 @@ function AutoExpandReasoningRow({ value, onChange }: AutoExpandReasoningRowProps
 
 const TOOL_CALL_DETAIL_ROW_STYLE = [settingsStyles.row, settingsStyles.rowBorder];
 const TOOL_CALL_DETAIL_LEVELS: readonly AppSettings["toolCallDetailLevel"][] = [
-  "overview",
-  "concise",
   "detailed",
+  "overview",
 ];
 
 function getToolCallDetailLevelLabel(