feat: integrate pixel teacher presence and resilient classroom preview

src/types/coding-conversation.ts

@@ -61,6 +61,8 @@ export type CodingPromptRequestStatus =
 
 export interface CodingPromptRequestState {
   clientRequestId: string;
+  /** The run returned by Main when this request is accepted. */
+  runId?: string;
   mode: PromptMode;
   nodeId?: string;
   status: CodingPromptRequestStatus;