fix(dashboard): redirect to course start after auto-enroll (#741)

* fix(dashboard): redirect to course start after auto-enroll

After successful enrollment on the org-site enroll page, verified users
were always sent to /lms because resolvePostEnrollRedirect was hardcoded.
Restore the API redirectTo target (/courses/:id/lessons?next=true) so
students land on their first lesson, with /course/:slug as fallback.

Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

* fix(dashboard): match LMS continue path after auto-enroll

Use the same student course continue URL as the LMS home page
(/courses/:id/lessons?next=true) via a shared helper, and navigate with
goto instead of a hard reload or org-site /course/:slug fallback.

Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

---------
Co-authored-by: Rotimi Best <rotimi-best@users.noreply.github.com>

apps/dashboard/src/lib/features/lms/components/learning.svelte

@@ -13,10 +13,11 @@
     getStudentCourseComplianceStatusVariant,
     getStudentCourseProgressPercent
   } from '$features/course/utils/compliance-utils';
+  import { getStudentCourseContinuePath } from '$features/course/utils/student-course-navigation';
 
   const gotoCourse = (id: string | undefined) => {
     if (!id) return;
-    goto(`/courses/${id}/lessons?next=true`);
+    goto(getStudentCourseContinuePath(id));
   };
 
   let highlightedCourses = $derived.by(() => {