Fix four reported bugs: typst export 500, export shown for all project types, Lumiere tile button layout, i18n

- ConversionController.js: add typst to CONVERSION_CONFIGS (missing entry caused 400→500 chain)
- export-project-with-conversion-button: hide button for non-LaTeX projects (typst/quarto) via compiler check
- project-list-lumiere.tsx + scss: revert lumiere-card-actions back inside .lumiere-card (put them back like they were)

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

services/clsi/app/js/ConversionController.js

@@ -25,6 +25,7 @@ const CONVERSION_CONFIGS = {
   docx: { extension: 'docx' },
   markdown: { extension: 'zip' },
   html: { extension: 'zip' },
+  typst: { extension: 'typ' },
 }
 
 async function convertDocumentToLaTeX(req, res) {
@@ -34,7 +35,7 @@ async function convertDocumentToLaTeX(req, res) {
     await fs.unlink(path).catch(() => {})
     return res.sendStatus(404)
   }
-  if (!conversionType || !['docx', 'markdown'].includes(conversionType)) {
+  if (!conversionType || !['docx', 'markdown', 'typst'].includes(conversionType)) {
     await fs.unlink(path).catch(() => {})
     return res.sendStatus(400)
   }

services/web/frontend/js/features/ide-react/components/toolbar/export-project-with-conversion-button.tsx

@@ -6,6 +6,7 @@ import { useCommandProvider } from '../../hooks/use-command-provider'
 import OLDropdownMenuItem from '@/shared/components/ol/ol-dropdown-menu-item'
 import { useRootDoc } from '@/shared/hooks/use-root-doc'
 import { useEditorManagerContext } from '@/features/ide-react/context/editor-manager-context'
+import { useProjectSettingsContext } from '@/features/editor-left-menu/context/project-settings-context'
 
 type ExportProjectWithConversionProps = {
   featureFlag?: string
@@ -22,6 +23,8 @@ export const ExportProjectWithConversionButton: FC<
   const enablePandocConversions =
     getMeta('ol-ExposedSettings')?.enablePandocConversions
   const anonymous = getMeta('ol-anonymous')
+  const { compiler } = useProjectSettingsContext()
+  const isLatexProject = !['typst', 'quarto'].includes(compiler ?? '')
   const getRootDocInfo = useRootDoc()
   const { openDocs } = useEditorManagerContext()
   const downloadConversion = useConvertProject(
@@ -31,7 +34,10 @@ export const ExportProjectWithConversionButton: FC<
   )
 
   const showExportButton =
-    splitTestEnabledIfNeeded && enablePandocConversions && !anonymous
+    splitTestEnabledIfNeeded &&
+    enablePandocConversions &&
+    !anonymous &&
+    isLatexProject
 
   useCommandProvider(
     () =>

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

@@ -171,9 +171,6 @@ const ProjectCard = memo(function ProjectCard({
             <span className="lumiere-card-date">{date}</span>
           </div>
         </a>
-      </div>
-      {/* Actions live outside .lumiere-card so Popper dropdowns are not
-          clipped by the card's backdrop-filter / transform context. */}
         <div className="lumiere-card-actions">
           <CopyProjectButtonTooltip project={project} />
           <DownloadProjectButtonTooltip project={project} />
@@ -186,6 +183,7 @@ const ProjectCard = memo(function ProjectCard({
           <TrashProjectButtonTooltip project={project} />
         </div>
       </div>
+    </div>
   )
 })
 

services/web/frontend/stylesheets/pages/project-list-lumiere.scss

@@ -537,28 +537,14 @@ $lum-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' wi
     }
   }
 
-  // Action strip — lives *outside* .lumiere-card so the dropdown menus inside
-  // are not trapped by the card's backdrop-filter and transform (both of which
-  // create a new containing block for position:fixed, clipping Popper menus).
-  // position:absolute on the wrapper (which has no transform/filter) lets any
-  // position:fixed child escape to the viewport as expected.
+  // Action strip — icon buttons that fade in when the card is hovered
   .lumiere-card-actions {
-    position: absolute;
-    bottom: 0;
-    left: 0;
-    right: 0;
-    z-index: 2;
     display: flex;
     align-items: center;
     justify-content: center;
     gap: 2px;
     padding: 3px 6px 5px;
-    // Solid background — intentionally no backdrop-filter here, which would
-    // also create a fixed containing block and trap the Popper dropdown.
-    background: rgba(255, 255, 255, 0.97);
     border-top: 1px solid rgba($lum-teal, 0.10);
-    border-bottom-left-radius: 10px;
-    border-bottom-right-radius: 10px;
     opacity: 0;
     transition: opacity 0.15s ease;
 
@@ -575,8 +561,8 @@ $lum-noise: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' wi
     }
   }
 
-  .lumiere-card-wrapper:hover .lumiere-card-actions,
-  .lumiere-card-wrapper:focus-within .lumiere-card-actions {
+  .lumiere-card:hover .lumiere-card-actions,
+  .lumiere-card:focus-within .lumiere-card-actions {
     opacity: 1;
   }