Show reasoning output automatically when enabled (#1943)

* feat(app): add auto-expand reasoning setting

* chore: add cross-env mise tool

* fix(app): stabilize web export and settings detail placement

* Revert "chore: add cross-env mise tool"

This reverts commit f56a367e0cd6766140db2d3b30a1c57bff4d9a14.

* perf(app): narrow settings reads in agent stream

---------

Co-authored-by: Mohamed Boudra <boudra.moha@gmail.com>

packages/app/src/hooks/use-settings/storage.ts

@@ -39,6 +39,7 @@ export interface AppSettings {
   codeFontSize: number; // clamped px, default 12
   syntaxTheme: SyntaxThemeId; // default "one"
   workspaceTitleSource: WorkspaceTitleSource;
+  autoExpandReasoning: boolean;
 }
 
 export interface Settings extends AppSettings {
@@ -58,6 +59,7 @@ export const DEFAULT_CLIENT_SETTINGS: AppSettings = {
   codeFontSize: DEFAULT_CODE_FONT_SIZE,
   syntaxTheme: "one",
   workspaceTitleSource: "title",
+  autoExpandReasoning: false,
 };
 
 export const DEFAULT_APP_SETTINGS: Settings = {
@@ -204,6 +206,9 @@ function pickAppSettings(stored: Partial<AppSettings>): Partial<AppSettings> {
   ) {
     result.workspaceTitleSource = stored.workspaceTitleSource;
   }
+  if (typeof stored.autoExpandReasoning === "boolean") {
+    result.autoExpandReasoning = stored.autoExpandReasoning;
+  }
   return result;
 }