feat(email): add persistent smartmta storage and runtime-managed email domain syncing

ts/opsserver/handlers/stats.handler.ts

@@ -530,13 +530,49 @@ export class StatsHandler {
       nextRetry?: number;
     }>;
   }> {
-    // TODO: Implement actual queue status collection
+    const emailServer = this.opsServerRef.dcRouterRef.emailServer;
+    if (!emailServer) {
+      return {
+        pending: 0,
+        active: 0,
+        failed: 0,
+        retrying: 0,
+        items: [],
+      };
+    }
+
+    const queueStats = emailServer.getQueueStats();
+    const items = emailServer.getQueueItems()
+      .sort((a, b) => {
+        const left = a.createdAt instanceof Date ? a.createdAt.getTime() : new Date(a.createdAt).getTime();
+        const right = b.createdAt instanceof Date ? b.createdAt.getTime() : new Date(b.createdAt).getTime();
+        return right - left;
+      })
+      .slice(0, 50)
+      .map((item) => {
+        const emailLike = item.processingResult;
+        const recipients = Array.isArray(emailLike?.to)
+          ? emailLike.to
+          : Array.isArray(emailLike?.email?.to)
+            ? emailLike.email.to
+            : [];
+        const subject = emailLike?.subject || emailLike?.email?.subject || '';
+        return {
+          id: item.id,
+          recipient: recipients[0] || '',
+          subject,
+          status: item.status,
+          attempts: item.attempts,
+          nextRetry: item.nextAttempt instanceof Date ? item.nextAttempt.getTime() : undefined,
+        };
+      });
+
     return {
-      pending: 0,
-      active: 0,
-      failed: 0,
-      retrying: 0,
-      items: [],
+      pending: queueStats.status.pending,
+      active: queueStats.status.processing,
+      failed: queueStats.status.failed,
+      retrying: queueStats.status.deferred,
+      items,
     };
   }
   
@@ -600,4 +636,4 @@ export class StatsHandler {
       ],
     };
   }
-}
+}