fix: reconcile stale queued messages (#1063)

Recover missed messages-consumed events from authoritative Hub state after session SSE reconnects.

web/src/api/client.ts

@@ -39,6 +39,7 @@ import type {
     MachinePathsExistsResponse,
     OpencodeModelsResponse,
     OpencodeReasoningEffortResponse,
+    QueuedStateResponse,
     ReopenSessionResponse,
     UploadFileResponse
 } from '@hapi/protocol/apiTypes'
@@ -408,6 +409,16 @@ export class ApiClient {
         })
     }
 
+    async getQueuedState(sessionId: string, localIds: string[]): Promise<QueuedStateResponse> {
+        return await this.request<QueuedStateResponse>(
+            `/api/sessions/${encodeURIComponent(sessionId)}/messages/queued-state`,
+            {
+                method: 'POST',
+                body: JSON.stringify({ localIds })
+            }
+        )
+    }
+
     async cancelMessage(sessionId: string, messageId: string): Promise<CancelMessageResponse> {
         const response = await this.request(
             `/api/sessions/${encodeURIComponent(sessionId)}/messages/${encodeURIComponent(messageId)}`,