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/routes/(org-site)/course/[slug]/enroll/+page.svelte

@@ -13,6 +13,7 @@
   import { resolve } from '$app/paths';
   import { authClient } from '$lib/utils/services/auth/client';
   import { appInitApi } from '$features/app/init.svelte';
+  import { getStudentCourseContinuePath } from '$features/course/utils/student-course-navigation';
 
   let { data } = $props();
 
@@ -28,10 +29,6 @@
   const isLoggedIn = $derived(sessionReady && Boolean(sessionUser));
   const isEmailVerified = $derived(Boolean($profile.isEmailVerified || sessionUser?.emailVerified));
 
-  function resolvePostEnrollRedirect(): string {
-    return '/lms';
-  }
-
   async function sendVerificationEmail() {
     const email = $profile.email || sessionUser?.email;
     if (!email) {
@@ -141,7 +138,7 @@
       }
 
       navigatingAway = true;
-      window.location.href = resolvePostEnrollRedirect();
+      await goto(resolve(getStudentCourseContinuePath(data.course.id), {}));
     } finally {
       enrollmentInFlight = false;
       if (!navigatingAway) {