feat: add BullMQ job queue with admin monitoring UI

- Add BullMQ to backend; mail jobs (verification, password reset) now enqueued instead of sent inline
- Mail worker processes jobs with 3-attempt exponential backoff retry
- Admin GraphQL resolvers: adminQueues, adminQueueJobs, adminRetryJob, adminRemoveJob, adminPauseQueue, adminResumeQueue
- Admin frontend page at /admin/queues: queue cards with counts, job table with status filter, retry/remove/pause actions

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

packages/frontend/src/lib/i18n/locales/en.ts

@@ -913,6 +913,7 @@ export default {
       articles: "Articles",
       comments: "Comments",
       recordings: "Recordings",
+      queues: "Queues",
     },
     common: {
       save_changes: "Save changes",
@@ -1058,6 +1059,36 @@ export default {
       delete_success: "Recording deleted",
       delete_error: "Failed to delete recording",
     },
+    queues: {
+      title: "Job Queues",
+      pause: "Pause",
+      resume: "Resume",
+      paused_badge: "Paused",
+      retry: "Retry",
+      remove: "Remove",
+      retry_success: "Job retried",
+      retry_error: "Failed to retry job",
+      remove_success: "Job removed",
+      remove_error: "Failed to remove job",
+      pause_success: "Queue paused",
+      pause_error: "Failed to pause queue",
+      resume_success: "Queue resumed",
+      resume_error: "Failed to resume queue",
+      col_id: "ID",
+      col_name: "Name",
+      col_status: "Status",
+      col_attempts: "Attempts",
+      col_created: "Created",
+      col_actions: "Actions",
+      no_jobs: "No jobs found",
+      status_all: "All",
+      status_waiting: "Waiting",
+      status_active: "Active",
+      status_completed: "Completed",
+      status_failed: "Failed",
+      status_delayed: "Delayed",
+      failed_reason: "Reason: {reason}",
+    },
     article_form: {
       new_title: "New article",
       edit_title: "Edit article",

packages/frontend/src/lib/services.ts

@@ -1876,3 +1876,145 @@ export async function adminDeleteRecording(id: string): Promise<void> {
     await getGraphQLClient().request(ADMIN_DELETE_RECORDING_MUTATION, { id });
   });
 }
+
+// --- Queues ---
+
+export type JobCounts = {
+  waiting: number;
+  active: number;
+  completed: number;
+  failed: number;
+  delayed: number;
+  paused: number;
+};
+
+export type QueueInfo = {
+  name: string;
+  counts: JobCounts;
+  isPaused: boolean;
+};
+
+export type Job = {
+  id: string;
+  name: string;
+  queue: string;
+  status: string;
+  data: Record<string, unknown>;
+  result: unknown;
+  failedReason: string | null;
+  attemptsMade: number;
+  createdAt: string;
+  processedAt: string | null;
+  finishedAt: string | null;
+  progress: number | null;
+};
+
+const ADMIN_QUEUES_QUERY = gql`
+  query AdminQueues {
+    adminQueues {
+      name
+      isPaused
+      counts {
+        waiting
+        active
+        completed
+        failed
+        delayed
+        paused
+      }
+    }
+  }
+`;
+
+export async function getAdminQueues(
+  fetchFn?: typeof globalThis.fetch,
+  token?: string,
+): Promise<QueueInfo[]> {
+  return loggedApiCall("getAdminQueues", async () => {
+    const client = token ? getAuthClient(token, fetchFn) : getGraphQLClient(fetchFn);
+    const data = await client.request<{ adminQueues: QueueInfo[] }>(ADMIN_QUEUES_QUERY);
+    return data.adminQueues;
+  });
+}
+
+const ADMIN_QUEUE_JOBS_QUERY = gql`
+  query AdminQueueJobs($queue: String!, $status: String, $limit: Int, $offset: Int) {
+    adminQueueJobs(queue: $queue, status: $status, limit: $limit, offset: $offset) {
+      id
+      name
+      queue
+      status
+      data
+      result
+      failedReason
+      attemptsMade
+      createdAt
+      processedAt
+      finishedAt
+      progress
+    }
+  }
+`;
+
+export async function getAdminQueueJobs(
+  queue: string,
+  status?: string,
+  limit?: number,
+  offset?: number,
+): Promise<Job[]> {
+  return loggedApiCall("getAdminQueueJobs", async () => {
+    const data = await getGraphQLClient().request<{ adminQueueJobs: Job[] }>(
+      ADMIN_QUEUE_JOBS_QUERY,
+      { queue, status, limit, offset },
+    );
+    return data.adminQueueJobs;
+  });
+}
+
+const ADMIN_RETRY_JOB_MUTATION = gql`
+  mutation AdminRetryJob($queue: String!, $jobId: String!) {
+    adminRetryJob(queue: $queue, jobId: $jobId)
+  }
+`;
+
+export async function adminRetryJob(queue: string, jobId: string): Promise<void> {
+  return loggedApiCall("adminRetryJob", async () => {
+    await getGraphQLClient().request(ADMIN_RETRY_JOB_MUTATION, { queue, jobId });
+  });
+}
+
+const ADMIN_REMOVE_JOB_MUTATION = gql`
+  mutation AdminRemoveJob($queue: String!, $jobId: String!) {
+    adminRemoveJob(queue: $queue, jobId: $jobId)
+  }
+`;
+
+export async function adminRemoveJob(queue: string, jobId: string): Promise<void> {
+  return loggedApiCall("adminRemoveJob", async () => {
+    await getGraphQLClient().request(ADMIN_REMOVE_JOB_MUTATION, { queue, jobId });
+  });
+}
+
+const ADMIN_PAUSE_QUEUE_MUTATION = gql`
+  mutation AdminPauseQueue($queue: String!) {
+    adminPauseQueue(queue: $queue)
+  }
+`;
+
+const ADMIN_RESUME_QUEUE_MUTATION = gql`
+  mutation AdminResumeQueue($queue: String!) {
+    adminResumeQueue(queue: $queue)
+  }
+`;
+
+export async function adminPauseQueue(queue: string): Promise<void> {
+  return loggedApiCall("adminPauseQueue", async () => {
+    await getGraphQLClient().request(ADMIN_PAUSE_QUEUE_MUTATION, { queue });
+  });
+}
+
+export async function adminResumeQueue(queue: string): Promise<void> {
+  return loggedApiCall("adminResumeQueue", async () => {
+    await getGraphQLClient().request(ADMIN_RESUME_QUEUE_MUTATION, { queue });
+  });
+}