Merge remote main and reconcile agent refresh with ongoing chats

src/lib/coding-teacher.ts

@@ -11,6 +11,10 @@ import type {
   TeacherTopicList,
   TeacherConversationView,
 } from '../../shared/coding-teacher';
+export interface TeacherCatalogState {
+  config: TeacherAvailability & { definition: TeacherDefinition | null };
+  catalog: TeacherCatalog;
+}
 export function teacherTopicsPath(projectId: string) {
   return projectId === 'preview'
     ? '/api/coding/teacher-preview/topics'