feat(client): show digital sync failure details

qimingclaw/crates/agent-electron-client/src/main/services/digitalEmployee/syncService.ts

@@ -33,6 +33,18 @@ interface OutboxRow {
   last_attempt_at?: string | null;
 }
 
+export interface DigitalEmployeeSyncFailure {
+  id: string;
+  entityType: string;
+  entityId: string;
+  operation: string;
+  attempts: number;
+  lastAttemptAt: string | null;
+  error: string | null;
+  createdAt: string;
+  updatedAt: string;
+}
+
 interface SyncAck {
   outbox_id?: string;
   id?: string;
@@ -59,6 +71,7 @@ export interface DigitalEmployeeSyncStatus {
   failed: number;
   lastSyncAt: string | null;
   lastSyncError: string | null;
+  recentFailures: DigitalEmployeeSyncFailure[];
 }
 
 export function startDigitalEmployeeSyncWorker(): void {
@@ -94,6 +107,7 @@ export function getDigitalEmployeeSyncStatus(): DigitalEmployeeSyncStatus {
     failed: countOutbox("failed"),
     lastSyncAt,
     lastSyncError,
+    recentFailures: readRecentFailures(),
   };
 }
 
@@ -369,6 +383,45 @@ function countOutbox(status: string): number {
   return row?.count ?? 0;
 }
 
+function readRecentFailures(limit = 3): DigitalEmployeeSyncFailure[] {
+  const db = getDb();
+  if (!db) return [];
+  const rows = db
+    .prepare(
+      `
+        SELECT id, entity_type, entity_id, operation, attempts,
+               last_attempt_at, error, created_at, updated_at
+        FROM digital_sync_outbox
+        WHERE status = 'failed'
+        ORDER BY COALESCE(last_attempt_at, updated_at, created_at) DESC
+        LIMIT ?
+      `,
+    )
+    .all(limit) as Array<{
+      id: string;
+      entity_type: string;
+      entity_id: string;
+      operation: string;
+      attempts: number;
+      last_attempt_at: string | null;
+      error: string | null;
+      created_at: string;
+      updated_at: string;
+    }>;
+
+  return rows.map((row) => ({
+    id: row.id,
+    entityType: row.entity_type,
+    entityId: row.entity_id,
+    operation: row.operation,
+    attempts: row.attempts,
+    lastAttemptAt: row.last_attempt_at,
+    error: row.error,
+    createdAt: row.created_at,
+    updatedAt: row.updated_at,
+  }));
+}
+
 function entityTable(entityType: string): string | null {
   switch (entityType) {
     case "plan":