feat(database): inline embed + Open button + side peek + title placeholder

- Page title placeholder: new pages created with empty title, CSS :empty::before shows 'New page' in gray
- Database is now inline embed within page (not full-page replacement)
- Embed block 'collection' renders database table via FlowDeckDB.renderInto()
- Open button in column 1 of each row opens page in side peek panel
- Side peek: iframe loading /pages/{id}?embed=1, close/fullscreen/resize
- DB scripts refactored as reusable DBInstance + global FlowDeckDB API

app/templates/_page_editor_scripts.html

@@ -55,6 +55,7 @@
       if(b.type==='image')return `<div class="block-wrapper"><div class="block-content block-image" style="text-align:center;padding:12px 0;"><img src="${b.src||''}" alt="${esc(b.alt||'')}" style="max-width:100%;max-height:70vh;border-radius:8px;display:block;margin:0 auto;" onerror="this.style.display='none';this.parentElement.innerHTML='<div style=\\'padding:40px;color:var(--text-tertiary)\\'>Image not found</div>'"></div></div>`;
       if(b.type==='embed'){
         if(b.embed_type==='inline_dbs')return `<div class="block-wrapper"><div class="block-content block-inline-dbs"><div style="padding:20px;text-align:center;color:var(--text-secondary);">📊 Inline Databases</div><div class="inline-dbs-grid">${(b.dbs||[]).map(db=>`<a href="/db/${db.id}/view/${db.view_type||'table'}" class="inline-db-card" target="_blank" style="display:block;padding:12px 16px;background:var(--bg-secondary);border-radius:8px;margin:8px 0;text-decoration:none;color:var(--text-primary);border:1px solid var(--border);"><span style="font-weight:500">📋 ${db.name}</span><span style="float:right;font-size:12px;color:var(--text-tertiary);">${db.view_type==='form'?'📝 Form':'📊 Table'} →</span></a>`).join('')}</div></div></div>`;
+        if(b.embed_type==='collection')return `<div class="block-wrapper"><div class="block-content block-embed-collection" id="inline-db-${b.collection_id}" style="padding:0;min-height:200px"><div style="padding:40px;text-align:center;color:var(--text-dim)">Loading database...</div></div><script>setTimeout(function(){var el=document.getElementById('inline-db-${b.collection_id}');if(el&&window.FlowDeckDB)window.FlowDeckDB.renderInto(el,${b.collection_id},null);},50);</script></div>`;
         if(b.embed_type==='pdf')return `<div class="block-wrapper"><div class="block-content block-embed" style="padding:0;"><iframe src="${b.src||''}" style="width:100%;height:80vh;border:none;border-radius:8px;" onerror="this.style.display='none';this.nextElementSibling.style.display='block';"></iframe><div style="display:none;text-align:center;padding:32px;color:var(--text-secondary);"><svg width="48" height="48" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="1.5"><path d="M14 2H6a2 2 0 0 0-2 2v16a2 2 0 0 0 2 2h12a2 2 0 0 0 2-2V8z"/><polyline points="14 2 14 8 20 8"/></svg><p style="margin-top:8px;">Failed to load PDF</p><a href="${b.src||''}" target="_blank" style="color:var(--accent);">Open in new tab →</a></div></div></div>`;
         if(b.embed_type==='download'){
           var sz=b.file_size||0;var szStr=sz<1024?sz+' B':sz<1048576?(sz/1024).toFixed(1)+' KB':(sz/1048576).toFixed(1)+' MB';
@@ -322,22 +323,23 @@
         },
         deletePage(){this.moreOpen=false;if(!confirm('Move to Trash?'))return;const csrf=document.cookie.match(/csrf_token=([^;]+)/);fetch(`/board/api/pages/${this.pid}/trash`,{method:'POST',headers:{'X-CSRF-Token':csrf?csrf[1]:''}}).then(()=>{window.location.href='/';}).catch(()=>{window.showToast('Failed','error');});},
 
-        // ── v4.5.0+: Get Started actions ──
-        inlineDBs:[],
+        // ── v4.6.0: Get Started actions ──
         async createDatabase(){
           const name=prompt('Database name:',this.pageTitle||'New Database');
           if(!name||!name.trim())return;
           const csrf=document.cookie.match(/csrf_token=([^;]+)/);
           try{
-            const r=await fetch(`/api/pages/${this.pid}/convert-to-database`,{
+            // Create collection via API
+            const r=await fetch('/db/api',{
               method:'POST',headers:{'Content-Type':'application/json','X-CSRF-Token':csrf?csrf[1]:''},
               body:JSON.stringify({name:name.trim()})
             });
             const d=await r.json();
-            if(d.status==='converted'){
-              this.showToast('Database created — reloading...');
-              // Reload to show the database table view
-              setTimeout(()=>{window.location.href=d.view_url;},500);
+            if(d.id){
+              // Add inline database embed block to the page
+              this.blocks.push(this.mkB('embed','',{embed_type:'collection',collection_id:d.id}));
+              this.render(); this.dirty=true; this.autoSave();
+              this.showToast('Database created: '+d.name);
             }else{
               this.showToast('Failed to create database');
             }