feat: project Pi conversation events

tests/unit/pi-runtime-auth-recovery.test.ts

@@ -35,7 +35,22 @@ class AuthFailureWorker implements PiConversationWorker {
     if (command.type === 'prompt') {
       throw new PiProcessError('PI_RPC_RESPONSE_ERROR', '401 provider authentication failed');
     }
-    return { type: 'response', id: 'fake', success: true };
+    const data = command.type === 'get_state'
+      ? { sessionId: `session-${this.id}`, isStreaming: false, isCompacting: false }
+      : command.type === 'get_entries'
+        ? { entries: [], leafId: null }
+        : command.type === 'get_session_stats'
+          ? {
+            contextUsage: { tokens: 0, contextWindow: 100_000, percent: 0 },
+            tokens: { input: 0, output: 0, cacheRead: 0, cacheWrite: 0, total: 0 },
+          }
+          : undefined;
+    return {
+      type: 'response',
+      id: 'fake',
+      success: true,
+      ...(data === undefined ? {} : { data: data as T }),
+    };
   }
 
   subscribe(_listener: (event: PiRpcEvent) => void): () => void { return () => undefined; }