feat: real timestamp + working Export + polished More menu in page editor

- 'Edited X ago' now shows real relative time from page.updated_at
- timeAgo computed getter in editorState() calculates relative time
- Export now generates a Markdown file from blocks and triggers download
- blocksToMarkdown() helper converts blocks to proper Markdown syntax
  (headings, lists, todos, quotes, dividers, code blocks)
- More menu items: Duplicate (was working), Export (now works),
  Move to Trash (was working), Copy link (via shortcut)

app/templates/page_editor.html

@@ -8,7 +8,7 @@ page_title %}{{ page.title }}{% endblock %} {% block topbar %}
     <!-- ═══════════ Action Bar (Share, Copy, Favorite, More) ═══════════ -->
     <div class="page-topbar">
         <div class="page-topbar-right" style="position: relative">
-            <span class="topbar-edited">Edited just now</span>
+            <span class="topbar-edited">Edited <span x-text="timeAgo"></span></span>
             <button
                 class="page-action-btn share-btn"
                 @click="shareOpen = !shareOpen"
@@ -583,6 +583,7 @@ page_title %}{{ page.title }}{% endblock %} {% block topbar %}
     function editorState(){
       return {
         pid:null,pageTitle:'',blocks:[],dirty:false,saving:false,lastSaved:'',st:null,
+        updatedAt:'{{ page.get("updated_at", "") }}',
         fmt:{open:false,top:0,left:0,idx:-1},
         shareOpen:false,moreOpen:false,gsMoreOpen:false,accessMenuOpen:false,
         shareTab:'share',favorited:false,
@@ -592,6 +593,14 @@ page_title %}{{ page.title }}{% endblock %} {% block topbar %}
         pageUrl:window.location.href,publishedUrl:'',
         inviteEmail:'',invitePermission:'editor',accessList:[],
         toastVisible:false,toastMsg:'',
+        get timeAgo() {
+          if (!this.updatedAt) return 'just now';
+          var diff = Math.floor((Date.now() - new Date(this.updatedAt + 'Z').getTime()) / 1000);
+          if (diff < 60) return 'just now';
+          if (diff < 3600) return Math.floor(diff / 60) + 'm ago';
+          if (diff < 86400) return Math.floor(diff / 3600) + 'h ago';
+          return Math.floor(diff / 86400) + 'd ago';
+        },
         init(){
           _bid=Math.floor(Math.random()*10000);
           const dataEl=document.getElementById('page-data');
@@ -706,7 +715,21 @@ page_title %}{{ page.title }}{% endblock %} {% block topbar %}
         },
         invitePerson(){if(!this.inviteEmail.trim())return;this.accessList.push({email:this.inviteEmail,permission:this.invitePermission,permOpen:false});this.inviteEmail='';},
         removeAccess(email){this.accessList=this.accessList.filter(a=>a.email!==email);},
-        exportPage(){this.moreOpen=false;},
+        exportPage(){
+          this.moreOpen=false;
+          // Export blocks as Markdown
+          var md = '# ' + (this.pageTitle || 'Untitled') + '\n\n';
+          for (var i = 0; i < this.blocks.length; i++) {
+            var b = this.blocks[i];
+            md += blocksToMarkdown(b) + '\n\n';
+          }
+          var blob = new Blob([md], {type: 'text/markdown'});
+          var url = URL.createObjectURL(blob);
+          var a = document.createElement('a');
+          a.href = url; a.download = (this.pageTitle || 'export') + '.md';
+          a.click(); URL.revokeObjectURL(url);
+          this.showToast('Exported as Markdown');
+        },
         duplicatePage(){this.moreOpen=false;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages?title=${encodeURIComponent(this.pageTitle+' copy')}&section=Private&project=${encodeURIComponent('{{ workspace_key }}')}`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(r=>r.json()).then(d=>{window.location.href=`/pages/${d.id}`;}).catch(()=>{window.showToast('Duplicate failed','error');});},
         movePage(){this.moreOpen=false;},
         deletePage(){this.moreOpen=false;if(!confirm('Move to Trash?'))return;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages/${this.pid}/trash`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(()=>{window.location.href='/';}).catch(()=>{window.showToast('Failed','error');});},
@@ -783,5 +806,22 @@ page_title %}{{ page.title }}{% endblock %} {% block topbar %}
     	  };
     	}
     document.addEventListener('mouseup',()=>{setTimeout(()=>{const s=window.getSelection();if(!s||s.isCollapsed)return;const ed=document.querySelector('.page-editor-wrapper');if(!ed?.__x)return;const d=ed.__x.$data;const ct=document.getElementById('_blocksCt');if(!ct?.contains(s.anchorNode))return;const bel=s.anchorNode.parentElement?.closest('[data-bid]');if(bel){const idx=d.getIdx(bel.dataset.bid);if(idx>=0)d.showFmt(idx);}},80);});
+    function blocksToMarkdown(b) {
+      var c = b.content || '';
+      switch(b.type) {
+        case 'heading_1': return '# ' + c;
+        case 'heading_2': return '## ' + c;
+        case 'heading_3': return '### ' + c;
+        case 'heading_4': return '#### ' + c;
+        case 'bulleted_list': return '- ' + c;
+        case 'numbered_list': return '1. ' + c;
+        case 'to_do': return (b.checked ? '- [x] ' : '- [ ] ') + c;
+        case 'quote': return '> ' + c;
+        case 'divider': return '---';
+        case 'code': return '```' + (b.language || '') + '\n' + c + '\n```';
+        case 'toggle': return '## ' + c;
+        default: return c;
+      }
+    }
 </script>
 {% endblock %}