feat: HLS streaming, transcripts, agent course generation & landing-page course previews (#663)

New features:
- HLS video encoding/streaming (hls routes, hls-encoder) and a media
  transcripts pipeline (transcripts route + media-transcript queries)
- AI assistant chat vs. run model: agent-course-generation worker/queue,
  run-monitor pane, chat-changes card, content ask-ai bar
- Per-theme course-page previews across org landing-page themes (bold,
  classic, corporate, editorial, etc.) with a shared course token/component set
- View-as-student mode and login-link / link-invite invite flows

Refactor:
- Extract packages/core consolidating config (env, storage, dashboard-url),
  services and utils previously duplicated under apps/api/src/config
- Remove legacy agent service modules (chat-tools, chat-context,
  context-window, document, fetch-url, lesson-content)
- Relax Cross-Origin-Resource-Policy to allow cross-origin media embedding
- Add format script to tenant-router so turbo run format covers it

packages/jobs/src/enqueue/agent-course-generation.ts

@@ -0,0 +1,25 @@
+import type { JobsOptions } from 'bullmq';
+
+import { JOB_NAMES, QUEUE_NAMES } from '../queues/names';
+import { QUEUE_DEFAULTS } from '../queues/defaults';
+import { getQueue } from '../queues/factories';
+import type { TAgentCourseGenerationPayload } from '../payloads/agent-course-generation';
+
+function toJobId(runId: string, attempt: number): string {
+  return `agent-course-generation-${runId}-${attempt}`;
+}
+
+export async function enqueueAgentCourseGenerationRun(
+  payload: TAgentCourseGenerationPayload,
+  options: { attempt: number } & JobsOptions
+): Promise<string | undefined> {
+  const { attempt, ...jobOptions } = options;
+
+  const job = await getQueue(QUEUE_NAMES.agentCourseGeneration).add(JOB_NAMES.agentCourseGeneration.run, payload, {
+    ...QUEUE_DEFAULTS[QUEUE_NAMES.agentCourseGeneration],
+    jobId: toJobId(payload.runId, attempt),
+    ...jobOptions
+  });
+
+  return job.id;
+}

packages/jobs/src/enqueue/index.ts

@@ -1,2 +1,3 @@
 export * from './media';
 export * from './emails';
+export * from './agent-course-generation';

packages/jobs/src/payloads/agent-course-generation.ts

@@ -0,0 +1,15 @@
+import * as z from 'zod';
+
+/**
+ * Payload for long-running AI course-generation runs.
+ *
+ * The worker re-loads the full run from Postgres by id. Keep the queue payload
+ * tiny so retries always use the latest durable run state and checkpoints.
+ */
+export const ZAgentCourseGenerationPayload = z.object({
+  runId: z.string().uuid(),
+  requestedByUserId: z.string().uuid(),
+  organizationId: z.string().uuid()
+});
+
+export type TAgentCourseGenerationPayload = z.infer<typeof ZAgentCourseGenerationPayload>;

packages/jobs/src/payloads/index.ts

@@ -1,3 +1,4 @@
 export * from './media';
 export * from './emails';
 export * from './maintenance';
+export * from './agent-course-generation';

packages/jobs/src/payloads/maintenance.ts

@@ -23,6 +23,15 @@ export type TDeadLetterCleanupPayload = z.infer<typeof ZDeadLetterCleanupPayload
  * stops blocking new runs after a worker crash, server restart, or lost
  * BullMQ job.
  */
+/**
+ * Daily aggregation of raw analytics page events into the daily rollup tables.
+ * Defaults to rolling up yesterday's data.
+ */
+export const ZAnalyticsDailyRollupPayload = z.object({
+  daysAgo: z.number().int().positive().default(1)
+});
+export type TAnalyticsDailyRollupPayload = z.infer<typeof ZAnalyticsDailyRollupPayload>;
+
 export const ZMediaJobReapPayload = z.object({
   staleAfterMinutes: z.number().int().positive().default(30)
 });

packages/jobs/src/queues/defaults.ts

@@ -47,6 +47,12 @@ export const QUEUE_DEFAULTS: Record<QueueName, JobsOptions> = {
     removeOnComplete: { age: 7 * 86_400, count: 500 },
     removeOnFail: { age: 14 * 86_400 }
   },
+  [QUEUE_NAMES.agentCourseGeneration]: {
+    attempts: 3,
+    backoff: { type: 'exponential', delay: 60_000 },
+    removeOnComplete: { age: 7 * 86_400, count: 1_000 },
+    removeOnFail: { age: 14 * 86_400 }
+  },
   [QUEUE_NAMES.onboardingBootstrap]: {
     attempts: 3,
     backoff: { type: 'exponential', delay: 30_000 },

packages/jobs/src/queues/names.ts

@@ -9,6 +9,7 @@ export const QUEUE_NAMES = {
   notifications: 'notifications',
   webhooks: 'webhooks',
   courseImports: 'course-imports',
+  agentCourseGeneration: 'agent-course-generation',
   onboardingBootstrap: 'onboarding-bootstrap',
   maintenance: 'maintenance'
 } as const;
@@ -35,9 +36,13 @@ export const JOB_NAMES = {
   webhooks: {
     deliver: 'deliver'
   },
+  agentCourseGeneration: {
+    run: 'run'
+  },
   maintenance: {
     retentionCompact: 'retention-compact',
     deadLetterCleanup: 'dead-letter-cleanup',
-    mediaJobReap: 'media-job-reap'
+    mediaJobReap: 'media-job-reap',
+    analyticsDailyRollup: 'analytics-daily-rollup'
   }
 } as const;