feat(icon): Notion-style icon picker + custom workspace emojis; fix side peek file content & ctx menu overflow

app/templates/local_workspace.html

@@ -1098,7 +1098,6 @@ window._wsInitData = (function() {
     async setItemIcon(node, icon) {
       if (!node || !node.id) return;
       icon = (icon || '').trim();
-      if (!icon) return;
       try {
         var r = await fetch('/board/api/pages/' + node.id + '/icon', {
           method: 'POST',
@@ -1774,7 +1773,10 @@ window._wsInitData = (function() {
 
     // ── File type icon ──
     _fileIcon(name, isFolder, contentFormat, customIcon) {
-      if (customIcon) return '<span class="page-icon-svg" style="font-size:14px;line-height:1;">'+this.esc(customIcon)+'</span>';
+      if (customIcon) {
+        var html = window.fdIconHtml ? window.fdIconHtml(customIcon, 14) : this.esc(customIcon);
+        return '<span class="page-icon-svg" style="font-size:14px;line-height:1;display:inline-flex;align-items:center;">'+html+'</span>';
+      }
       if (isFolder) return '<span class="page-icon-svg">'+getSvgIcon('folder',14)+'</span>';
       // FlowDeck internal pages (no extension, blocks/markdown format)
       if (contentFormat && contentFormat !== 'file') return '<span class="page-icon-svg">'+getSvgIcon('edit',14)+'</span>';