fix(autofix-request-card): simplify animated-if usage and reorder overlays

Replace animated-if with plain if for in_progress status to avoid issues
with animation behavior. Reorganize BlurredOverlay sections for better
clarity: show explanation markdown with overlay first, then animate the
display of changed files with their overlay. Update button labels and
spacing to improve user experience when showing explanations and fixed
code. These changes fix UI glitches and enhance code readability.

Author: rohitpaulk

app/components/course-page/test-results-bar/autofix-request-card.hbs

@@ -18,7 +18,8 @@
       {{/if}}
     {{/animated-value}}
 
-    {{#animated-if (eq @autofixRequest.status "in_progress") use=this.transition duration=200}}
+    {{! Investigate issue with animated-if usage here }}
+    {{#if (eq @autofixRequest.status "in_progress")}}
       <CoursePage::TestResultsBar::AutofixRequestCard::LogstreamSection class="mt-3" @autofixRequest={{@autofixRequest}} />
     {{else}}
       <div>
@@ -69,6 +70,6 @@
           </BlurredOverlay>
         {{/animated-if}}
       </div>
-    {{/animated-if}}
+    {{/if}}
   </AnimatedContainer>
 </div>