fix(app): correct inverted chevron direction in todo list (#14628)

Co-authored-by: shenghui kevin <shenghuikevin@shenghuideMac-mini.local>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

packages/app/src/pages/session/composer/session-todo-dock.tsx

@@ -87,7 +87,7 @@ export function SessionTodoDock(props: { todos: Todo[]; title: string; collapseL
             icon="chevron-down"
             size="normal"
             variant="ghost"
-            classList={{ "rotate-180": !store.collapsed }}
+            classList={{ "rotate-180": store.collapsed }}
             onMouseDown={(event) => {
               event.preventDefault()
               event.stopPropagation()