feat: add workapp mail sync API

ts/opsserver/handlers/workhoster.handler.ts

@@ -129,6 +129,36 @@ export class WorkHosterHandler {
         },
       ),
     );
+
+    this.typedrouter.addTypedHandler(
+      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_GetWorkAppMailIdentities>(
+        'getWorkAppMailIdentities',
+        async (dataArg) => {
+          await this.requireAuth(dataArg, 'workhosters:read');
+          const manager = this.opsServerRef.dcRouterRef.workAppMailManager;
+          if (!manager) return { identities: [] };
+          return { identities: await manager.listMailIdentities(dataArg.ownership) };
+        },
+      ),
+    );
+
+    this.typedrouter.addTypedHandler(
+      new plugins.typedrequest.TypedHandler<interfaces.requests.IReq_SyncWorkAppMailIdentity>(
+        'syncWorkAppMailIdentity',
+        async (dataArg) => {
+          const userId = await this.requireAuth(dataArg, 'workhosters:write');
+          const manager = this.opsServerRef.dcRouterRef.workAppMailManager;
+          if (!manager) {
+            return { success: false, message: 'WorkApp mail manager not initialized' };
+          }
+          try {
+            return await manager.syncMailIdentity(dataArg, userId);
+          } catch (error) {
+            return { success: false, message: (error as Error).message };
+          }
+        },
+      ),
+    );
   }
 
   private getGatewayCapabilities(): interfaces.data.IGatewayCapabilities {