fix: rewrite copy/paste/duplicate using Fabric's native clone(), add layer features

- Copy/paste/duplicate now uses obj.clone() instead of broken fromObject() serialization
- Ctrl+C stores actual object refs, Ctrl+V clones them — works for images, groups, paths, text
- System clipboard copy (Ctrl+C / Ctrl+Shift+C) properly re-selects after screenshot
- Layer panel: double-click to rename, collapsible groups with expand/collapse arrow
- Auto-indexed names: Image 1, Image 2, Drawing 1, Drawing 2, etc.
- Group children visible in layer panel when expanded
- Copy/paste works on groups and mixed multi-selections

frontend/src/components/LayerPanel.tsx

@@ -18,6 +18,7 @@ interface LayerPanelProps {
   onToggleLock: (id: string) => void;
   onReorder: (fromIndex: number, toIndex: number) => void;
   onDelete: (id: string) => void;
+  onRename: (id: string, name: string) => void;
   onGroup: () => void;
   onUngroup: () => void;
   hasSelection: boolean;
@@ -26,10 +27,13 @@ interface LayerPanelProps {
 
 export default function LayerPanel({
   layers, selectedIds, onSelect, onToggleVisible, onToggleLock,
-  onReorder, onDelete, onGroup, onUngroup, hasSelection, hasGroupSelection,
+  onReorder, onDelete, onRename, onGroup, onUngroup, hasSelection, hasGroupSelection,
 }: LayerPanelProps) {
   const [collapsed, setCollapsed] = useState(false);
   const [dragIdx, setDragIdx] = useState<number | null>(null);
+  const [editingId, setEditingId] = useState<string | null>(null);
+  const [editValue, setEditValue] = useState('');
+  const [expandedGroups, setExpandedGroups] = useState<Set<string>>(new Set());
 
   const onDragStart = useCallback((idx: number) => setDragIdx(idx), []);
   const onDragOver = useCallback((e: React.DragEvent) => e.preventDefault(), []);
@@ -40,15 +44,36 @@ export default function LayerPanel({
     setDragIdx(null);
   }, [dragIdx, onReorder]);
 
+  const toggleGroupExpand = useCallback((id: string) => {
+    setExpandedGroups((prev) => {
+      const next = new Set(prev);
+      if (next.has(id)) next.delete(id); else next.add(id);
+      return next;
+    });
+  }, []);
+
+  const startRename = useCallback((id: string, currentName: string) => {
+    setEditingId(id);
+    setEditValue(currentName);
+  }, []);
+
+  const commitRename = useCallback(() => {
+    if (editingId && editValue.trim()) {
+      onRename(editingId, editValue.trim());
+    }
+    setEditingId(null);
+    setEditValue('');
+  }, [editingId, editValue, onRename]);
+
   if (collapsed) {
     return (
       <div style={{
         position: 'absolute', right: 0, top: 0, bottom: 0, width: '28px',
-        background: '#1e1e1e', borderLeft: '1px solid #2a2a2a', zIndex: 100,
+        background: '#111', borderLeft: '1px solid #1a1a1a', zIndex: 100,
         display: 'flex', alignItems: 'flex-start', justifyContent: 'center', paddingTop: '8px',
       }}>
         <button onClick={() => setCollapsed(false)} title="Show layers"
-          style={{ background: 'none', border: 'none', color: '#888', cursor: 'pointer', fontSize: '14px', padding: '4px' }}>
+          style={{ background: 'none', border: 'none', color: '#555', cursor: 'pointer', fontSize: '14px', padding: '4px' }}>
           <svg width="14" height="14" viewBox="0 0 14 14" fill="none" stroke="currentColor" strokeWidth="1.5">
             <path d="M7 2L2 7l5 5" strokeLinecap="round" strokeLinejoin="round" />
           </svg>
@@ -57,35 +82,151 @@ export default function LayerPanel({
     );
   }
 
+  function getTypeIcon(type: string, isGroup: boolean) {
+    if (isGroup) return '\u25B8'; // triangle
+    if (type === 'image') return '\u{1F5BC}';
+    if (type === 'i-text') return 'T';
+    if (type === 'path') return '\u270E';
+    return '\u25C7';
+  }
+
+  function renderLayer(layer: LayerItem, realIdx: number, depth = 0) {
+    const selected = selectedIds.includes(layer.id);
+    const isExpanded = expandedGroups.has(layer.id);
+    const isEditing = editingId === layer.id;
+
+    return (
+      <React.Fragment key={layer.id}>
+        <div
+          draggable={!isEditing}
+          onDragStart={() => onDragStart(realIdx)}
+          onDragOver={onDragOver}
+          onDrop={() => onDrop(realIdx)}
+          onClick={() => onSelect(layer.id)}
+          style={{
+            display: 'flex', alignItems: 'center', gap: '3px',
+            padding: `3px 6px 3px ${6 + depth * 12}px`, cursor: 'pointer',
+            background: selected ? 'rgba(74,158,255,0.1)' : dragIdx === realIdx ? '#1a1a1a' : 'transparent',
+            borderBottom: '1px solid #151515',
+            borderLeft: selected ? '2px solid #4a9eff' : '2px solid transparent',
+            opacity: layer.visible ? 1 : 0.35,
+            transition: 'background 0.1s',
+          }}
+          onMouseEnter={(e) => { if (!selected) (e.currentTarget as HTMLDivElement).style.background = '#161616'; }}
+          onMouseLeave={(e) => { if (!selected) (e.currentTarget as HTMLDivElement).style.background = 'transparent'; }}
+        >
+          {/* Group expand/collapse */}
+          {layer.isGroup ? (
+            <button onClick={(e) => { e.stopPropagation(); toggleGroupExpand(layer.id); }}
+              style={{ background: 'none', border: 'none', padding: '2px', cursor: 'pointer', color: '#666', flexShrink: 0, fontSize: '10px', width: '14px' }}>
+              {isExpanded ? '\u25BE' : '\u25B8'}
+            </button>
+          ) : (
+            <span style={{ width: '14px', flexShrink: 0 }} />
+          )}
+
+          {/* Visibility toggle */}
+          <button onClick={(e) => { e.stopPropagation(); onToggleVisible(layer.id); }}
+            title={layer.visible ? 'Hide' : 'Show'}
+            style={{ background: 'none', border: 'none', padding: '1px', cursor: 'pointer', color: layer.visible ? '#666' : '#333', flexShrink: 0 }}>
+            <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.2">
+              {layer.visible ? (
+                <><ellipse cx="5" cy="5" rx="4" ry="2.5" /><circle cx="5" cy="5" r="1" fill="currentColor" /></>
+              ) : (
+                <><line x1="1" y1="1" x2="9" y2="9" /><ellipse cx="5" cy="5" rx="4" ry="2.5" /></>
+              )}
+            </svg>
+          </button>
+
+          {/* Lock toggle */}
+          <button onClick={(e) => { e.stopPropagation(); onToggleLock(layer.id); }}
+            title={layer.locked ? 'Unlock' : 'Lock'}
+            style={{ background: 'none', border: 'none', padding: '1px', cursor: 'pointer', color: layer.locked ? '#e8a946' : '#333', flexShrink: 0 }}>
+            <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.2">
+              {layer.locked ? (
+                <><rect x="2" y="5" width="6" height="4" rx="0.5" /><path d="M3.5 5V3.5a1.5 1.5 0 013 0V5" /></>
+              ) : (
+                <><rect x="2" y="5" width="6" height="4" rx="0.5" /><path d="M3.5 5V3.5a1.5 1.5 0 013 0" /></>
+              )}
+            </svg>
+          </button>
+
+          {/* Type icon */}
+          <span style={{ fontSize: '9px', color: '#444', flexShrink: 0, width: '12px', textAlign: 'center' }}>
+            {getTypeIcon(layer.type, layer.isGroup)}
+          </span>
+
+          {/* Name (editable) */}
+          {isEditing ? (
+            <input
+              autoFocus
+              value={editValue}
+              onChange={(e) => setEditValue(e.target.value)}
+              onBlur={commitRename}
+              onKeyDown={(e) => {
+                if (e.key === 'Enter') commitRename();
+                if (e.key === 'Escape') { setEditingId(null); setEditValue(''); }
+              }}
+              onClick={(e) => e.stopPropagation()}
+              style={{
+                flex: 1, fontSize: '11px', color: '#ddd', background: '#0d0d0d',
+                border: '1px solid #333', borderRadius: '3px', padding: '1px 4px',
+                outline: 'none', minWidth: 0,
+              }}
+            />
+          ) : (
+            <span
+              onDoubleClick={(e) => { e.stopPropagation(); startRename(layer.id, layer.name); }}
+              style={{
+                flex: 1, fontSize: '11px', color: selected ? '#ccc' : '#888',
+                overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap',
+                cursor: 'text',
+              }}
+              title="Double-click to rename"
+            >
+              {layer.name}
+            </span>
+          )}
+
+          {/* Delete */}
+          <button onClick={(e) => { e.stopPropagation(); onDelete(layer.id); }}
+            title="Delete"
+            style={{ background: 'none', border: 'none', padding: '2px', cursor: 'pointer', color: '#333', flexShrink: 0 }}
+            onMouseEnter={(e) => { e.currentTarget.style.color = '#ff6b6b'; }}
+            onMouseLeave={(e) => { e.currentTarget.style.color = '#333'; }}>
+            <svg width="8" height="8" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.5">
+              <line x1="2" y1="2" x2="8" y2="8" /><line x1="8" y1="2" x2="2" y2="8" />
+            </svg>
+          </button>
+        </div>
+
+        {/* Group children */}
+        {layer.isGroup && isExpanded && layer.children && (
+          layer.children.map((child, ci) => renderLayer(child, realIdx, depth + 1))
+        )}
+      </React.Fragment>
+    );
+  }
+
   return (
     <div style={{
       position: 'absolute', right: 0, top: 0, bottom: 0, width: '200px',
-      background: '#1e1e1e', borderLeft: '1px solid #2a2a2a', zIndex: 100,
+      background: '#111', borderLeft: '1px solid #1a1a1a', zIndex: 100,
       display: 'flex', flexDirection: 'column', userSelect: 'none',
     }}>
       {/* Header */}
       <div style={{
         display: 'flex', alignItems: 'center', justifyContent: 'space-between',
-        padding: '6px 8px', borderBottom: '1px solid #2a2a2a', flexShrink: 0,
+        padding: '6px 8px', borderBottom: '1px solid #1a1a1a', flexShrink: 0,
       }}>
-        <span style={{ fontSize: '11px', fontWeight: 600, color: '#999', letterSpacing: '0.5px', textTransform: 'uppercase' }}>
+        <span style={{ fontSize: '10px', fontWeight: 600, color: '#555', letterSpacing: '0.8px', textTransform: 'uppercase' }}>
           Layers
         </span>
         <div style={{ display: 'flex', gap: '2px' }}>
-          <SmallBtn title="Group (Ctrl+G)" disabled={!hasSelection} onClick={onGroup}>
-            <svg width="12" height="12" viewBox="0 0 12 12" fill="none" stroke="currentColor" strokeWidth="1.2">
-              <rect x="1" y="1" width="4" height="4" rx="0.5" /><rect x="7" y="7" width="4" height="4" rx="0.5" />
-              <path d="M5 6h2M6 5v2" strokeLinecap="round" />
-            </svg>
-          </SmallBtn>
-          <SmallBtn title="Ungroup (Ctrl+Shift+G)" disabled={!hasGroupSelection} onClick={onUngroup}>
-            <svg width="12" height="12" viewBox="0 0 12 12" fill="none" stroke="currentColor" strokeWidth="1.2">
-              <rect x="1" y="1" width="4" height="4" rx="0.5" /><rect x="7" y="7" width="4" height="4" rx="0.5" />
-              <path d="M4 6h4" strokeLinecap="round" />
-            </svg>
-          </SmallBtn>
+          <SmallBtn title="Group (Ctrl+G)" disabled={!hasSelection} onClick={onGroup}>G+</SmallBtn>
+          <SmallBtn title="Ungroup (Ctrl+Shift+G)" disabled={!hasGroupSelection} onClick={onUngroup}>G-</SmallBtn>
           <SmallBtn title="Collapse panel" onClick={() => setCollapsed(true)}>
-            <svg width="12" height="12" viewBox="0 0 12 12" fill="none" stroke="currentColor" strokeWidth="1.5">
+            <svg width="10" height="10" viewBox="0 0 12 12" fill="none" stroke="currentColor" strokeWidth="1.5">
               <path d="M5 2l5 5-5 5" strokeLinecap="round" strokeLinejoin="round" />
             </svg>
           </SmallBtn>
@@ -96,79 +237,10 @@ export default function LayerPanel({
       <div style={{ flex: 1, overflowY: 'auto', overflowX: 'hidden' }}>
         {[...layers].reverse().map((layer, i) => {
           const realIdx = layers.length - 1 - i;
-          const selected = selectedIds.includes(layer.id);
-          return (
-            <div
-              key={layer.id}
-              draggable
-              onDragStart={() => onDragStart(realIdx)}
-              onDragOver={onDragOver}
-              onDrop={() => onDrop(realIdx)}
-              onClick={() => onSelect(layer.id)}
-              style={{
-                display: 'flex', alignItems: 'center', gap: '4px',
-                padding: '3px 6px', cursor: 'pointer',
-                background: selected ? '#2a3a50' : dragIdx === realIdx ? '#2a2a2a' : 'transparent',
-                borderBottom: '1px solid #222',
-                opacity: layer.visible ? 1 : 0.4,
-              }}
-              onMouseEnter={(e) => { if (!selected) (e.currentTarget as HTMLDivElement).style.background = '#252525'; }}
-              onMouseLeave={(e) => { if (!selected) (e.currentTarget as HTMLDivElement).style.background = 'transparent'; }}
-            >
-              {/* Visibility toggle */}
-              <button onClick={(e) => { e.stopPropagation(); onToggleVisible(layer.id); }}
-                title={layer.visible ? 'Hide' : 'Show'}
-                style={{ background: 'none', border: 'none', padding: '2px', cursor: 'pointer', color: layer.visible ? '#888' : '#444', flexShrink: 0 }}>
-                <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.2">
-                  {layer.visible ? (
-                    <><ellipse cx="5" cy="5" rx="4" ry="2.5" /><circle cx="5" cy="5" r="1" fill="currentColor" /></>
-                  ) : (
-                    <><line x1="1" y1="1" x2="9" y2="9" /><ellipse cx="5" cy="5" rx="4" ry="2.5" /></>
-                  )}
-                </svg>
-              </button>
-
-              {/* Lock toggle */}
-              <button onClick={(e) => { e.stopPropagation(); onToggleLock(layer.id); }}
-                title={layer.locked ? 'Unlock' : 'Lock'}
-                style={{ background: 'none', border: 'none', padding: '2px', cursor: 'pointer', color: layer.locked ? '#e8a946' : '#444', flexShrink: 0 }}>
-                <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.2">
-                  {layer.locked ? (
-                    <><rect x="2" y="5" width="6" height="4" rx="0.5" /><path d="M3.5 5V3.5a1.5 1.5 0 013 0V5" /></>
-                  ) : (
-                    <><rect x="2" y="5" width="6" height="4" rx="0.5" /><path d="M3.5 5V3.5a1.5 1.5 0 013 0" /></>
-                  )}
-                </svg>
-              </button>
-
-              {/* Type icon */}
-              <span style={{ fontSize: '9px', color: '#555', flexShrink: 0, width: '12px', textAlign: 'center' }}>
-                {layer.isGroup ? '📁' : layer.type === 'image' ? '🖼' : layer.type === 'i-text' ? 'T' : layer.type === 'path' ? '✏' : '◇'}
-              </span>
-
-              {/* Name */}
-              <span style={{
-                flex: 1, fontSize: '11px', color: selected ? '#ccc' : '#999',
-                overflow: 'hidden', textOverflow: 'ellipsis', whiteSpace: 'nowrap',
-              }}>
-                {layer.name}
-              </span>
-
-              {/* Delete */}
-              <button onClick={(e) => { e.stopPropagation(); onDelete(layer.id); }}
-                title="Delete"
-                style={{ background: 'none', border: 'none', padding: '2px', cursor: 'pointer', color: '#444', flexShrink: 0, opacity: 0.5 }}
-                onMouseEnter={(e) => { e.currentTarget.style.opacity = '1'; e.currentTarget.style.color = '#ff6b6b'; }}
-                onMouseLeave={(e) => { e.currentTarget.style.opacity = '0.5'; e.currentTarget.style.color = '#444'; }}>
-                <svg width="10" height="10" viewBox="0 0 10 10" fill="none" stroke="currentColor" strokeWidth="1.3">
-                  <line x1="2" y1="2" x2="8" y2="8" /><line x1="8" y1="2" x2="2" y2="8" />
-                </svg>
-              </button>
-            </div>
-          );
+          return renderLayer(layer, realIdx);
         })}
         {layers.length === 0 && (
-          <div style={{ padding: '12px', textAlign: 'center', color: '#444', fontSize: '11px' }}>
+          <div style={{ padding: '16px', textAlign: 'center', color: '#333', fontSize: '11px' }}>
             No objects
           </div>
         )}
@@ -183,10 +255,10 @@ function SmallBtn({ onClick, title, disabled, children }: {
   return (
     <button onClick={onClick} title={title} disabled={disabled}
       style={{
-        background: 'none', border: 'none', padding: '3px', cursor: disabled ? 'default' : 'pointer',
-        color: disabled ? '#333' : '#888', borderRadius: '3px',
+        background: 'none', border: 'none', padding: '2px 4px', cursor: disabled ? 'default' : 'pointer',
+        color: disabled ? '#222' : '#666', borderRadius: '3px', fontSize: '9px', fontWeight: 600,
       }}
-      onMouseEnter={(e) => { if (!disabled) e.currentTarget.style.background = '#333'; }}
+      onMouseEnter={(e) => { if (!disabled) e.currentTarget.style.background = '#1a1a1a'; }}
       onMouseLeave={(e) => { e.currentTarget.style.background = 'none'; }}>
       {children}
     </button>

frontend/src/pages/Editor.tsx

@@ -296,30 +296,49 @@ export default function Editor({ isPublicView }: EditorProps) {
   }, []);
 
   // Refresh layer list from canvas
+  // Auto-name counters
+  const nameCounters = useRef<Record<string, number>>({});
+
+  function autoName(obj: any, i: number): string {
+    if (obj.name) return obj.name;
+    const type = obj.type || 'object';
+    if (type === 'image') {
+      nameCounters.current.image = (nameCounters.current.image || 0) + 1;
+      return `Image ${nameCounters.current.image}`;
+    }
+    if (type === 'i-text') return (obj.text || 'Text').slice(0, 20);
+    if (type === 'path') {
+      nameCounters.current.path = (nameCounters.current.path || 0) + 1;
+      return `Drawing ${nameCounters.current.path}`;
+    }
+    if (type === 'group') return `Group (${obj._objects?.length || 0})`;
+    return `${type} ${i + 1}`;
+  }
+
+  function buildLayerItem(obj: any, i: number): any {
+    const id = obj.id || `layer-${i}`;
+    const isGroup = obj.type === 'group';
+    let children: any[] | undefined;
+    if (isGroup && obj._objects) {
+      children = obj._objects.map((child: any, ci: number) => buildLayerItem(child, ci));
+    }
+    return {
+      id,
+      name: autoName(obj, i),
+      type: obj.type || 'object',
+      visible: obj.visible !== false,
+      locked: !obj.selectable,
+      isGroup,
+      children,
+    };
+  }
+
   const refreshLayers = useCallback(() => {
     const canvas = canvasRef.current?.getCanvas();
     if (!canvas) return;
+    nameCounters.current = {};
     const objects = canvas.getObjects();
-    const layers = objects.map((obj: any, i: number) => {
-      const id = obj.id || `layer-${i}`;
-      const isGroup = obj.type === 'group';
-      let name = obj.name || '';
-      if (!name) {
-        if (obj.type === 'image') name = 'Image';
-        else if (obj.type === 'i-text') name = (obj.text || 'Text').slice(0, 20);
-        else if (obj.type === 'path') name = 'Drawing';
-        else if (isGroup) name = `Group (${obj._objects?.length || 0})`;
-        else name = obj.type || 'Object';
-      }
-      return {
-        id,
-        name: `${name}`,
-        type: obj.type || 'object',
-        visible: obj.visible !== false,
-        locked: !obj.selectable,
-        isGroup,
-      };
-    });
+    const layers = objects.map((obj: any, i: number) => buildLayerItem(obj, i));
     setLayerList(layers);
     const activeIds = canvas.getActiveObjects().map((o: any) => o.id).filter(Boolean);
     setSelectedLayerIds(activeIds);
@@ -938,6 +957,15 @@ export default function Editor({ isPublicView }: EditorProps) {
                 refreshLayers();
               }
             }}
+            onRename={(id, name) => {
+              const canvas = canvasRef.current?.getCanvas();
+              if (!canvas) return;
+              const obj = canvas.getObjects().find((o: any) => o.id === id);
+              if (obj) {
+                (obj as any).name = name;
+                refreshLayers();
+              }
+            }}
             onGroup={handleGroup}
             onUngroup={handleUngroup}
             hasSelection={canvasRef.current?.getCanvas()?.getActiveObjects()?.length! > 1}