fix: show presentation download dropdown for all Quarto projects

quartoFlavor is set only after a project is compiled with the current
build. Existing Quarto projects that haven't been recompiled have
quartoFlavor=undefined, so the old check (quartoFlavor === 'revealjs')
fell through to the regular PDF compile button with no dropdown.

Drop the quartoFlavor guard — compiler === 'quarto' is sufficient since
all Quarto projects in Verso are RevealJS presentations. Changes applied
to ActionsCell (desktop icon), DownloadPresentationButtonTooltip guard,
and ActionsDropdown (mobile three-dot menu).

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

services/web/frontend/js/features/project-list/components/dropdown/actions-dropdown.tsx

@@ -78,8 +78,7 @@ function ActionsDropdown({ project }: ActionDropdownProps) {
             </li>
           )}
         </DownloadProjectButton>
-        {project.compiler === 'quarto' &&
-        project.quartoFlavor === 'revealjs' ? (
+        {project.compiler === 'quarto' ? (
           <DownloadPresentationButton project={project}>
             {(startExport, exporting) => (
               <>

services/web/frontend/js/features/project-list/components/table/cells/action-buttons/download-presentation-button.tsx

@@ -138,7 +138,7 @@ const DownloadPresentationButtonTooltip = memo(
   }: { project: Project }) {
     const { t } = useTranslation()
 
-    if (project.compiler !== 'quarto' || project.quartoFlavor !== 'revealjs') {
+    if (project.compiler !== 'quarto') {
       return null
     }
 

services/web/frontend/js/features/project-list/components/table/cells/actions-cell.tsx

@@ -15,7 +15,7 @@ type ActionsCellProps = {
 }
 
 const isQuartoSlides = (project: Project) =>
-  project.compiler === 'quarto' && project.quartoFlavor === 'revealjs'
+  project.compiler === 'quarto'
 
 export default function ActionsCell({ project }: ActionsCellProps) {
   return (