local-workspace: replace x-if/x-show with x-show only for preview panel

Root cause: Alpine 3.14.9 x-if on template element doesn't reliably re-render
when a reactive property changes. previewItem was being set (confirmed by logs)
but x-if never re-evaluated.

Fix: replace <template x-if> wrapper with direct x-show on the preview-panel div.
x-show with x-transition is the reliable pattern for this Alpine version.

app/templates/local_workspace.html

@@ -2805,8 +2805,7 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
   </div>
 
   <!-- Preview Panel — right side panel for file preview -->
-  <template x-if="previewItem">
-  <div class="preview-panel" x-transition:enter="preview-enter" x-transition:leave="preview-leave">
+  <div class="preview-panel" x-show="previewItem" x-transition:enter="preview-enter" x-transition:leave="preview-leave" x-cloak>
     <div class="preview-panel-header">
       <span x-html="_fileIcon(previewItem.name, previewItem.is_folder, previewItem.content_format)"></span>
       <span class="preview-panel-title" x-text="previewItem.name"></span>
@@ -2829,8 +2828,6 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
       <button class="btn btn-danger" @click="deleteWithUndo(previewItem)">{{ fd_icon("trash",14) }} Delete</button>
     </div>
   </div>
-  </template>
-
 </div><!-- /ws-split -->
 
 </div><!-- /_wsInitData wrapper -->