local-workspace: add Open button on file hover like Library, opens in side preview panel

- Add openSidePeek(id) helper method to find node by id and open in side preview
- Update renderChildren() static HTML OPEN button: replace full page nav with selectForPreview
- Add OPEN button in Alpine x-for tree template actions div for file items
- Uses existing preview-panel (right side panel) instead of navigating away

app/templates/local_workspace.html

@@ -1123,11 +1123,11 @@ window._wsInitData = (function() {
         }
         html += '<button class="ws-act" data-ws-action="rename" data-ws-id="'+escId+'" data-ws-name="'+escName+'" title="Rename">'+getSvgIcon('edit',14)+'</button>';
         html += '<button class="ws-act danger" data-ws-action="delete" data-ws-id="'+escId+'" data-ws-name="'+escName+'" title="Delete">'+getSvgIcon('trash',14)+'</button>';
-        // Open button for files
+        // Open button for files — opens in side preview panel (like Library)
         if (!c.is_folder) {
-          html += '<a href="/pages/'+escId+'" class="btn-open" style="display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border:1px solid var(--border);border-radius:4px;font-size:12px;color:var(--text-secondary);background:var(--bg-tertiary);cursor:pointer;text-decoration:none;margin-left:4px;opacity:0;"'
-               + ' onmouseover="this.style.opacity=\'1\'" onmouseout="this.style.opacity=\'0\'"'
-               + ' onclick="event.stopPropagation();return true">\u2931 Open</a>';
+          html += '<a href="#" class="btn-open hover-only" style="display:inline-flex;align-items:center;gap:4px;padding:3px 10px;border:1px solid var(--border);border-radius:4px;font-size:12px;color:var(--text-secondary);background:var(--bg-tertiary);cursor:pointer;text-decoration:none;margin-left:auto;"'
+               + ' onclick="event.stopPropagation();event.preventDefault();var d=window._wsData;if(d)d.openSidePeek('+escId+')"\n'
+               + ' title="Open in side preview">\u21e2 Open</a>';
         }
         // Tags
         if (c.tags && c.tags.length > 0) {
@@ -1791,6 +1791,10 @@ window._wsInitData = (function() {
     },
 
     openPage(id) { window.location = '/pages/'+id; },
+    openSidePeek(id) {
+      var node = this._findNodeById(this.tree, id) || this._findNodeById(this.displayTree, id);
+      if (node) this.selectForPreview(node);
+    },
 
     startRename(node) {
       this.target = node;
@@ -2441,6 +2445,9 @@ console.log('FLOWDECK v2.4.6 — IIFE done, _wsInitData keys:', Object.keys(wind
             </template>
             <button class="ws-act" @click.stop="startRename(node)" title="Rename">{{ fd_icon("edit",14) }}</button>
             <button class="ws-act danger" @click.stop="deleteWithUndo(node)" title="Delete">{{ fd_icon("trash",14) }}</button>
+            <template x-if="!node.is_folder">
+              <a href="#" class="btn-open" @click.prevent.stop="selectForPreview(node)" title="Open in side preview" style="margin-left:auto;">↢ Open</a>
+            </template>
           </div>
         </div>
         <!-- Children -->