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

apps/dashboard/src/routes/(app)/courses/[id]/+layout.svelte

@@ -13,14 +13,21 @@
   import { courseApi } from '$features/course/api';
   import ContentCreateModal from '$features/course/components/content/content-create-modal.svelte';
   import CourseCompletionModal from '$features/course/components/ceritficate/course-completion-modal.svelte';
-  import { aiAssistantPanelDefinition } from '$features/ai-assistant';
+  import { aiAssistantPanelDefinition, ContentAskAiBar, AI_ASSISTANT_PANEL_ID } from '$features/ai-assistant';
+  import {
+    getContentAskAiBarWidthClass,
+    isCourseContentLockedForStudent
+  } from '$features/ai-assistant/utils/content-ask-ai-bar';
   import { initialChatPrompt, openAiAssistant } from '$features/ai-assistant/utils/store';
   import { sidePanel, SidePanelRail } from '$features/side-panel';
   import { transcriptPanelDefinition } from '$features/course/components/lesson/video/transcript-panel-definition';
   import { get } from 'svelte/store';
+  import { page } from '$app/state';
   import { profile } from '$lib/utils/store/user';
   import { isOrgAdmin } from '$lib/utils/store/org';
+  import { isOrgStudent } from '$lib/utils/store/app';
   import { t } from '$lib/utils/functions/translations';
+  import { ContentType } from '@cio/utils/constants/content';
   import type { CourseMember } from '$features/course/utils/types';
   import {
     COURSE_SIDEBAR_DEFAULT_WIDTH,
@@ -79,6 +86,28 @@
 
   const isExercisePage = $derived(!!data.exerciseId);
 
+  const lessonId = $derived(page.params.lessonId as string | undefined);
+  const exerciseId = $derived((page.params.exerciseId as string | undefined) ?? data.exerciseId);
+  const isLessonOrExercisePage = $derived(Boolean(lessonId || exerciseId));
+  const isLessonEditMode = $derived(page.url.searchParams.get('mode') === 'edit');
+
+  const contentAskAiWidthClass = $derived(getContentAskAiBarWidthClass({ lessonId, isLessonEditMode }));
+
+  const isContentLockedForStudent = $derived(
+    isCourseContentLockedForStudent(
+      courseApi.course,
+      lessonId ?? exerciseId,
+      lessonId ? ContentType.Lesson : exerciseId ? ContentType.Exercise : null
+    )
+  );
+
+  const showContentAskAiBar = $derived(
+    isCourseReady &&
+      isLessonOrExercisePage &&
+      !($isOrgStudent && isContentLockedForStudent) &&
+      sidePanel.activePanelId !== AI_ASSISTANT_PANEL_ID
+  );
+
   function clampSidebarWidth(width: number) {
     return Math.min(COURSE_SIDEBAR_MAX_WIDTH, Math.max(COURSE_SIDEBAR_MIN_WIDTH, width));
   }
@@ -188,6 +217,10 @@
       {/if}
 
       {@render children?.()}
+
+      {#if showContentAskAiBar}
+        <ContentAskAiBar class={contentAskAiWidthClass} />
+      {/if}
     {/if}
   </Sidebar.Inset>