feat: redesign relation type configuration with improved UX

Updates the relation type configuration to match the new actor type UX
with a modern two-column layout and streamlined workflows.

Changes to relation type configuration:
- Two-column layout: quick add (left) + management list (right)
- Inline editing replaces the right column when editing
- Single-row layout for name, color, and line style fields
- Line style preview with visual feedback
- White background cards with click-to-edit interaction
- Always-visible duplicate and delete buttons
- Full-width edit mode for better focus
- Toast notifications for all actions
- Keyboard shortcuts (Cmd/Ctrl+Enter to add/save, Esc to cancel)
- Removed old EdgeTypeForm in favor of modular components

Changes to actor type configuration:
- Updated TypeManagementList to match EdgeTypeManagementList styling
- White background cards with click-to-edit
- Always-visible action buttons (no hover-to-reveal)
- Simplified implementation (removed complex menu states)
- Consistent appearance across both type configurations

New components:
- EdgeTypeFormFields: Reusable form with compact layout
- EditEdgeTypeInline: Inline editing component
- QuickAddEdgeTypeForm: Quick add interface
- EdgeTypeManagementList: Scrollable list with actions

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

src/components/Config/EdgeTypeConfig.tsx

@@ -1,17 +1,21 @@
 import { useState } from 'react';
 import { useGraphWithHistory } from '../../hooks/useGraphWithHistory';
-import EdgeTypeForm from './EdgeTypeForm';
 import { useConfirm } from '../../hooks/useConfirm';
+import { useToastStore } from '../../stores/toastStore';
+import QuickAddEdgeTypeForm from './QuickAddEdgeTypeForm';
+import EdgeTypeManagementList from './EdgeTypeManagementList';
+import EditEdgeTypeInline from './EditEdgeTypeInline';
 import type { EdgeTypeConfig, EdgeDirectionality } from '../../types';
 
 /**
  * EdgeTypeConfig - Modal for managing relation/edge types
  *
  * Features:
- * - Add new edge types with custom name, color, and style
- * - Edit existing edge types
- * - Delete edge types
- * - Style selector (solid, dashed, dotted)
+ * - Two-column layout: quick add (left) + management/edit (right)
+ * - Inline editing replaces right column
+ * - Compact card-based management list
+ * - Toast notifications for actions
+ * - Full keyboard accessibility
  */
 
 interface Props {
@@ -22,51 +26,38 @@ interface Props {
 const EdgeTypeConfigModal = ({ isOpen, onClose }: Props) => {
   const { edgeTypes, addEdgeType, updateEdgeType, deleteEdgeType } = useGraphWithHistory();
   const { confirm, ConfirmDialogComponent } = useConfirm();
+  const { showToast } = useToastStore();
 
-  const [newTypeName, setNewTypeName] = useState('');
-  const [newTypeColor, setNewTypeColor] = useState('#6366f1');
-  const [newTypeStyle, setNewTypeStyle] = useState<'solid' | 'dashed' | 'dotted'>('solid');
-  const [newTypeDirectionality, setNewTypeDirectionality] = useState<EdgeDirectionality>('directed');
+  const [editingType, setEditingType] = useState<EdgeTypeConfig | null>(null);
 
-  // Editing state
-  const [editingId, setEditingId] = useState<string | null>(null);
-  const [editLabel, setEditLabel] = useState('');
-  const [editColor, setEditColor] = useState('');
-  const [editStyle, setEditStyle] = useState<'solid' | 'dashed' | 'dotted'>('solid');
-  const [editDirectionality, setEditDirectionality] = useState<EdgeDirectionality>('directed');
-
-  const handleAddType = () => {
-    if (!newTypeName.trim()) {
-      alert('Please enter a name for the relation type');
-      return;
-    }
-
-    const id = newTypeName.toLowerCase().replace(/\s+/g, '-');
+  const handleAddType = (type: {
+    label: string;
+    color: string;
+    style: 'solid' | 'dashed' | 'dotted';
+    defaultDirectionality: EdgeDirectionality;
+  }) => {
+    const id = type.label.toLowerCase().replace(/\s+/g, '-');
 
     // Check if ID already exists
     if (edgeTypes.some(et => et.id === id)) {
-      alert('A relation type with this name already exists');
+      showToast('A relation type with this name already exists', 'error');
       return;
     }
 
     const newType: EdgeTypeConfig = {
       id,
-      label: newTypeName.trim(),
-      color: newTypeColor,
-      style: newTypeStyle,
-      defaultDirectionality: newTypeDirectionality,
+      label: type.label,
+      color: type.color,
+      style: type.style,
+      defaultDirectionality: type.defaultDirectionality,
     };
 
     addEdgeType(newType);
-
-    // Reset form
-    setNewTypeName('');
-    setNewTypeColor('#6366f1');
-    setNewTypeStyle('solid');
-    setNewTypeDirectionality('directed');
+    showToast(`Relation type "${type.label}" created`, 'success');
   };
 
   const handleDeleteType = async (id: string) => {
+    const type = edgeTypes.find(t => t.id === id);
     const confirmed = await confirm({
       title: 'Delete Relation Type',
       message: 'Are you sure you want to delete this relation type? This action cannot be undone.',
@@ -75,176 +66,144 @@ const EdgeTypeConfigModal = ({ isOpen, onClose }: Props) => {
     });
     if (confirmed) {
       deleteEdgeType(id);
+      showToast(`Relation type "${type?.label}" deleted`, 'success');
     }
   };
 
   const handleEditType = (type: EdgeTypeConfig) => {
-    setEditingId(type.id);
-    setEditLabel(type.label);
-    setEditColor(type.color);
-    setEditStyle(type.style || 'solid');
-    setEditDirectionality(type.defaultDirectionality || 'directed');
+    setEditingType(type);
   };
 
-  const handleSaveEdit = () => {
-    if (!editingId || !editLabel.trim()) return;
-
-    updateEdgeType(editingId, {
-      label: editLabel.trim(),
-      color: editColor,
-      style: editStyle,
-      defaultDirectionality: editDirectionality,
-    });
-
-    setEditingId(null);
+  const handleSaveEdit = (
+    id: string,
+    updates: {
+      label: string;
+      color: string;
+      style: 'solid' | 'dashed' | 'dotted';
+      defaultDirectionality: EdgeDirectionality;
+    }
+  ) => {
+    updateEdgeType(id, updates);
+    setEditingType(null);
+    showToast(`Relation type "${updates.label}" updated`, 'success');
   };
 
   const handleCancelEdit = () => {
-    setEditingId(null);
+    setEditingType(null);
   };
 
-  const renderStylePreview = (style: 'solid' | 'dashed' | 'dotted', color: string) => {
-    const strokeDasharray = {
-      solid: '0',
-      dashed: '8,4',
-      dotted: '2,4',
-    }[style];
+  const handleDuplicateType = (type: EdgeTypeConfig) => {
+    // Generate a unique ID for the duplicate
+    let suffix = 2;
+    let newId = `${type.id}-copy`;
+    let newLabel = `${type.label} (Copy)`;
 
-    return (
-      <svg width="100%" height="20" className="mt-1">
-        <line
-          x1="0"
-          y1="10"
-          x2="100%"
-          y2="10"
-          stroke={color}
-          strokeWidth="3"
-          strokeDasharray={strokeDasharray}
-        />
-      </svg>
-    );
+    while (edgeTypes.some(et => et.id === newId)) {
+      newId = `${type.id}-copy-${suffix}`;
+      newLabel = `${type.label} (Copy ${suffix})`;
+      suffix++;
+    }
+
+    const duplicatedType: EdgeTypeConfig = {
+      id: newId,
+      label: newLabel,
+      color: type.color,
+      style: type.style,
+      defaultDirectionality: type.defaultDirectionality,
+    };
+
+    addEdgeType(duplicatedType);
+    showToast(`Relation type duplicated as "${newLabel}"`, 'success');
   };
 
   if (!isOpen) return null;
 
   return (
+    <>
+      {/* Main Modal */}
       <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
-      <div className="bg-white rounded-lg shadow-xl w-full max-w-2xl max-h-[80vh] overflow-hidden flex flex-col">
+        <div className="bg-white rounded-lg shadow-xl w-full max-w-5xl max-h-[85vh] overflow-hidden flex flex-col">
           {/* Header */}
           <div className="px-6 py-4 border-b border-gray-200">
             <h2 className="text-xl font-bold text-gray-900">Configure Relation Types</h2>
             <p className="text-sm text-gray-600 mt-1">
-            Customize the types of relations that can connect actors
+              Quickly add and manage the types of relations that can connect actors
             </p>
           </div>
 
-        {/* Content */}
-        <div className="flex-1 overflow-y-auto p-6">
-          {/* Add New Type Form */}
-          <div className="bg-gray-50 rounded-lg p-4 mb-6">
-            <h3 className="text-sm font-semibold text-gray-700 mb-3">Add New Relation Type</h3>
-            <EdgeTypeForm
-              name={newTypeName}
-              color={newTypeColor}
-              style={newTypeStyle}
-              defaultDirectionality={newTypeDirectionality}
-              onNameChange={setNewTypeName}
-              onColorChange={setNewTypeColor}
-              onStyleChange={setNewTypeStyle}
-              onDefaultDirectionalityChange={setNewTypeDirectionality}
+          {/* Content - Two-Column or Full-Width Edit */}
+          <div className="flex-1 overflow-hidden flex">
+            {editingType ? (
+              /* Full-Width Edit Mode */
+              <div className="w-full p-6 overflow-y-auto">
+                <div className="max-w-2xl mx-auto">
+                  <EditEdgeTypeInline
+                    type={editingType}
+                    onSave={handleSaveEdit}
+                    onCancel={handleCancelEdit}
                   />
-            <button
-              onClick={handleAddType}
-              className="w-full mt-3 px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-md hover:bg-blue-700 transition-colors"
-            >
-              Add Relation Type
-            </button>
-          </div>
-
-          {/* Existing Types List */}
-          <div>
-            <h3 className="text-sm font-semibold text-gray-700 mb-3">Existing Relation Types</h3>
-            <div className="space-y-2">
-              {edgeTypes.map((type) => (
-                <div
-                  key={type.id}
-                  className="border border-gray-200 rounded-md overflow-hidden"
-                >
-                  {editingId === type.id ? (
-                    // Edit mode
-                    <div className="bg-blue-50 p-4">
-                      <EdgeTypeForm
-                        name={editLabel}
-                        color={editColor}
-                        style={editStyle}
-                        defaultDirectionality={editDirectionality}
-                        onNameChange={setEditLabel}
-                        onColorChange={setEditColor}
-                        onStyleChange={setEditStyle}
-                        onDefaultDirectionalityChange={setEditDirectionality}
-                      />
-                      <div className="flex space-x-2 mt-3">
-                        <button
-                          onClick={handleSaveEdit}
-                          className="flex-1 px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-md hover:bg-blue-700 transition-colors"
-                        >
-                          Save
-                        </button>
-                        <button
-                          onClick={handleCancelEdit}
-                          className="flex-1 px-4 py-2 bg-gray-200 text-gray-800 text-sm font-medium rounded-md hover:bg-gray-300 transition-colors"
-                        >
-                          Cancel
-                        </button>
                 </div>
               </div>
             ) : (
-                    // View mode
-                    <div className="flex items-center justify-between p-3 hover:bg-gray-50 transition-colors">
-                      <div className="flex-1">
-                        <div className="text-sm font-medium text-gray-900 mb-1">
-                          {type.label}
-                        </div>
-                        <div className="w-full max-w-xs">
-                          {renderStylePreview(type.style || 'solid', type.color)}
-                        </div>
-                      </div>
-                      <div className="flex space-x-2">
-                        <button
-                          onClick={() => handleEditType(type)}
-                          className="px-3 py-1 text-sm text-blue-600 hover:bg-blue-50 rounded transition-colors"
-                        >
-                          Edit
-                        </button>
-                        <button
-                          onClick={() => handleDeleteType(type.id)}
-                          className="px-3 py-1 text-sm text-red-600 hover:bg-red-50 rounded transition-colors"
-                        >
-                          Delete
-                        </button>
-                      </div>
-                    </div>
-                  )}
-                </div>
-              ))}
+              <>
+                {/* Left Column - Quick Add (60%) */}
+                <div className="w-3/5 border-r border-gray-200 p-6 overflow-y-auto">
+                  <div>
+                    <h3 className="text-sm font-semibold text-gray-700 mb-4">
+                      Quick Add Relation Type
+                    </h3>
+                    <QuickAddEdgeTypeForm onAdd={handleAddType} />
                   </div>
+
+                  {/* Helper Text */}
+                  <div className="mt-6 p-4 bg-blue-50 border border-blue-200 rounded-lg">
+                    <h4 className="text-sm font-semibold text-blue-900 mb-1">Pro Tips</h4>
+                    <ul className="text-xs text-blue-800 space-y-1">
+                      <li>• Press <kbd className="px-1 py-0.5 bg-white border border-blue-300 rounded text-xs">Enter</kbd> to quickly add a type</li>
+                      <li>• Choose meaningful names like "Supervises" or "Reports To"</li>
+                      <li>• Use different line styles to distinguish relation types visually</li>
+                      <li>• Click any type on the right to edit it</li>
+                    </ul>
                   </div>
                 </div>
 
-        {/* Footer */}
+                {/* Right Column - Management (40%) */}
+                <div className="w-2/5 p-6 overflow-y-auto bg-gray-50">
+                  <div>
+                    <div className="flex items-center justify-between mb-4">
+                      <h3 className="text-sm font-semibold text-gray-700">
+                        Relation Types ({edgeTypes.length})
+                      </h3>
+                    </div>
+                    <EdgeTypeManagementList
+                      types={edgeTypes}
+                      onEdit={handleEditType}
+                      onDelete={handleDeleteType}
+                      onDuplicate={handleDuplicateType}
+                    />
+                  </div>
+                </div>
+              </>
+            )}
+          </div>
+
+          {/* Footer - Hidden when editing */}
+          {!editingType && (
             <div className="px-6 py-4 border-t border-gray-200 flex justify-end">
               <button
                 onClick={onClose}
-            className="px-4 py-2 bg-gray-200 text-gray-800 text-sm font-medium rounded-md hover:bg-gray-300 transition-colors"
+                className="px-4 py-2 bg-gray-200 text-gray-800 text-sm font-medium rounded-md hover:bg-gray-300 transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
               >
-            Close
+                Done
               </button>
             </div>
+          )}
+        </div>
       </div>
 
       {/* Confirmation Dialog */}
       {ConfirmDialogComponent}
-    </div>
+    </>
   );
 };
 

src/components/Config/EdgeTypeForm.tsx

@@ -1,130 +0,0 @@
-import type { EdgeDirectionality } from '../../types';
-
-/**
- * EdgeTypeForm - Reusable form fields for creating/editing edge types
- *
- * Features:
- * - Name input
- * - Color picker (visual + text input)
- * - Line style selector (solid/dashed/dotted)
- * - Default directionality selector
- * - Visual style preview
- */
-
-interface Props {
-  name: string;
-  color: string;
-  style: 'solid' | 'dashed' | 'dotted';
-  defaultDirectionality?: EdgeDirectionality;
-  onNameChange: (value: string) => void;
-  onColorChange: (value: string) => void;
-  onStyleChange: (value: 'solid' | 'dashed' | 'dotted') => void;
-  onDefaultDirectionalityChange?: (value: EdgeDirectionality) => void;
-}
-
-const EdgeTypeForm = ({
-  name,
-  color,
-  style,
-  defaultDirectionality = 'directed',
-  onNameChange,
-  onColorChange,
-  onStyleChange,
-  onDefaultDirectionalityChange,
-}: Props) => {
-  const renderStylePreview = (lineStyle: 'solid' | 'dashed' | 'dotted', lineColor: string) => {
-    const strokeDasharray = {
-      solid: '0',
-      dashed: '8,4',
-      dotted: '2,4',
-    }[lineStyle];
-
-    return (
-      <svg width="100%" height="20" className="mt-1">
-        <line
-          x1="0"
-          y1="10"
-          x2="100%"
-          y2="10"
-          stroke={lineColor}
-          strokeWidth="3"
-          strokeDasharray={strokeDasharray}
-        />
-      </svg>
-    );
-  };
-
-  return (
-    <div className="space-y-3">
-      <div>
-        <label className="block text-xs font-medium text-gray-700 mb-1">
-          Name *
-        </label>
-        <input
-          type="text"
-          value={name}
-          onChange={(e) => onNameChange(e.target.value)}
-          placeholder="e.g., Supervises, Communicates With"
-          className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-        />
-      </div>
-
-      <div>
-        <label className="block text-xs font-medium text-gray-700 mb-1">
-          Color *
-        </label>
-        <div className="flex items-center space-x-2">
-          <input
-            type="color"
-            value={color}
-            onChange={(e) => onColorChange(e.target.value)}
-            className="h-10 w-20 rounded cursor-pointer"
-          />
-          <input
-            type="text"
-            value={color}
-            onChange={(e) => onColorChange(e.target.value)}
-            placeholder="#6366f1"
-            className="flex-1 px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-          />
-        </div>
-      </div>
-
-      <div>
-        <label className="block text-xs font-medium text-gray-700 mb-1">
-          Line Style *
-        </label>
-        <select
-          value={style}
-          onChange={(e) => onStyleChange(e.target.value as 'solid' | 'dashed' | 'dotted')}
-          className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-        >
-          <option value="solid">Solid</option>
-          <option value="dashed">Dashed</option>
-          <option value="dotted">Dotted</option>
-        </select>
-        {renderStylePreview(style, color)}
-      </div>
-
-      <div>
-        <label className="block text-xs font-medium text-gray-700 mb-1">
-          Default Directionality *
-        </label>
-        <select
-          value={defaultDirectionality}
-          onChange={(e) => onDefaultDirectionalityChange?.(e.target.value as EdgeDirectionality)}
-          className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
-        >
-          <option value="directed">Directed (→) - One-way</option>
-          <option value="bidirectional">Bidirectional (↔) - Two-way</option>
-          <option value="undirected">Undirected (—) - No direction</option>
-        </select>
-        <p className="text-xs text-gray-500 mt-1">
-          New relations of this type will use this directionality by default
-        </p>
-      </div>
-    </div>
-  );
-};
-
-export default EdgeTypeForm;

src/components/Config/EdgeTypeFormFields.tsx

@@ -0,0 +1,152 @@
+import { KeyboardEvent } from 'react';
+import type { EdgeDirectionality } from '../../types';
+
+/**
+ * EdgeTypeFormFields - Reusable form fields for add/edit relation types
+ *
+ * Features:
+ * - All fields visible
+ * - Compact single-row layout for name and color
+ * - Keyboard accessible
+ * - Consistent between add and edit modes
+ */
+
+interface Props {
+  name: string;
+  color: string;
+  style: 'solid' | 'dashed' | 'dotted';
+  defaultDirectionality: EdgeDirectionality;
+  onNameChange: (value: string) => void;
+  onColorChange: (value: string) => void;
+  onStyleChange: (value: 'solid' | 'dashed' | 'dotted') => void;
+  onDefaultDirectionalityChange: (value: EdgeDirectionality) => void;
+  onKeyDown?: (e: KeyboardEvent) => void;
+  nameInputRef?: React.RefObject<HTMLInputElement>;
+  autoFocusName?: boolean;
+}
+
+const EdgeTypeFormFields = ({
+  name,
+  color,
+  style,
+  defaultDirectionality,
+  onNameChange,
+  onColorChange,
+  onStyleChange,
+  onDefaultDirectionalityChange,
+  onKeyDown,
+  nameInputRef,
+  autoFocusName = false,
+}: Props) => {
+  const renderStylePreview = (lineStyle: 'solid' | 'dashed' | 'dotted', lineColor: string) => {
+    const strokeDasharray = {
+      solid: '0',
+      dashed: '8,4',
+      dotted: '2,4',
+    }[lineStyle];
+
+    return (
+      <svg width="100%" height="20" className="mt-1">
+        <line
+          x1="0"
+          y1="10"
+          x2="100%"
+          y2="10"
+          stroke={lineColor}
+          strokeWidth="3"
+          strokeDasharray={strokeDasharray}
+        />
+      </svg>
+    );
+  };
+
+  return (
+    <div className="space-y-3">
+      {/* Name, Color, and Line Style - Single row */}
+      <div>
+        <div className="flex items-end gap-2">
+          {/* Name */}
+          <div className="flex-1 min-w-0">
+            <label htmlFor="edge-type-name" className="block text-xs font-medium text-gray-700 mb-1">
+              Name <span className="text-red-500">*</span>
+            </label>
+            <input
+              id="edge-type-name"
+              ref={nameInputRef}
+              type="text"
+              value={name}
+              onChange={(e) => onNameChange(e.target.value)}
+              onKeyDown={onKeyDown}
+              placeholder="e.g., Supervises"
+              className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+              aria-required="true"
+              autoFocus={autoFocusName}
+            />
+          </div>
+
+          {/* Color */}
+          <div className="w-20 flex-shrink-0">
+            <label htmlFor="edge-type-color-picker" className="block text-xs font-medium text-gray-700 mb-1">
+              Color <span className="text-red-500">*</span>
+            </label>
+            <input
+              id="edge-type-color-picker"
+              type="color"
+              value={color}
+              onChange={(e) => onColorChange(e.target.value)}
+              onKeyDown={onKeyDown}
+              className="h-8 w-full rounded cursor-pointer border border-gray-300"
+              aria-label="Color picker"
+            />
+          </div>
+
+          {/* Line Style */}
+          <div className="w-32 flex-shrink-0">
+            <label htmlFor="edge-type-style" className="block text-xs font-medium text-gray-700 mb-1">
+              Style <span className="text-red-500">*</span>
+            </label>
+            <select
+              id="edge-type-style"
+              value={style}
+              onChange={(e) => onStyleChange(e.target.value as 'solid' | 'dashed' | 'dotted')}
+              onKeyDown={onKeyDown}
+              className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+            >
+              <option value="solid">Solid</option>
+              <option value="dashed">Dashed</option>
+              <option value="dotted">Dotted</option>
+            </select>
+          </div>
+        </div>
+      </div>
+
+      {/* Line Style Preview */}
+      <div>
+        {renderStylePreview(style, color)}
+      </div>
+
+      {/* Default Directionality */}
+      <div>
+        <label htmlFor="edge-type-directionality" className="block text-xs font-medium text-gray-700 mb-1">
+          Default Directionality <span className="text-red-500">*</span>
+        </label>
+        <select
+          id="edge-type-directionality"
+          value={defaultDirectionality}
+          onChange={(e) => onDefaultDirectionalityChange(e.target.value as EdgeDirectionality)}
+          onKeyDown={onKeyDown}
+          className="w-full px-3 py-2 border border-gray-300 rounded-md text-sm focus:outline-none focus:ring-2 focus:ring-blue-500"
+        >
+          <option value="directed">Directed (→) - One-way</option>
+          <option value="bidirectional">Bidirectional (↔) - Two-way</option>
+          <option value="undirected">Undirected (—) - No direction</option>
+        </select>
+        <p className="text-xs text-gray-500 mt-1">
+          New relations of this type will use this directionality by default
+        </p>
+      </div>
+    </div>
+  );
+};
+
+export default EdgeTypeFormFields;

src/components/Config/EdgeTypeManagementList.tsx

@@ -0,0 +1,119 @@
+import DeleteIcon from '@mui/icons-material/Delete';
+import ContentCopyIcon from '@mui/icons-material/ContentCopy';
+import type { EdgeTypeConfig } from '../../types';
+
+/**
+ * EdgeTypeManagementList - List view of existing relation types
+ *
+ * Features:
+ * - Scrollable list of relation types
+ * - Visual preview of line style and color
+ * - Edit, duplicate, and delete actions
+ * - Hover states for better UX
+ */
+
+interface Props {
+  types: EdgeTypeConfig[];
+  onEdit: (type: EdgeTypeConfig) => void;
+  onDelete: (id: string) => void;
+  onDuplicate: (type: EdgeTypeConfig) => void;
+}
+
+const EdgeTypeManagementList = ({ types, onEdit, onDelete, onDuplicate }: Props) => {
+  const renderStylePreview = (style: 'solid' | 'dashed' | 'dotted', color: string) => {
+    const strokeDasharray = {
+      solid: '0',
+      dashed: '8,4',
+      dotted: '2,4',
+    }[style];
+
+    return (
+      <svg width="100" height="20">
+        <line
+          x1="0"
+          y1="10"
+          x2="100"
+          y2="10"
+          stroke={color}
+          strokeWidth="3"
+          strokeDasharray={strokeDasharray}
+        />
+      </svg>
+    );
+  };
+
+  if (types.length === 0) {
+    return (
+      <div className="text-center py-12 text-gray-500">
+        <p className="text-sm">No relation types yet.</p>
+        <p className="text-xs mt-1">Add your first relation type above.</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-2">
+      {types.map((type) => (
+        <div
+          key={type.id}
+          className="group bg-white border border-gray-200 rounded-lg p-3 hover:border-blue-300 hover:shadow-sm transition-all cursor-pointer"
+          onClick={() => onEdit(type)}
+          role="button"
+          tabIndex={0}
+          onKeyDown={(e) => {
+            if (e.key === 'Enter' || e.key === ' ') {
+              e.preventDefault();
+              onEdit(type);
+            }
+          }}
+          aria-label={`Edit ${type.label}`}
+        >
+          <div className="flex items-start justify-between gap-3">
+            {/* Type Info */}
+            <div className="flex-1 min-w-0">
+              <div className="text-sm font-medium text-gray-900 mb-1">
+                {type.label}
+              </div>
+              <div className="flex items-center gap-2">
+                {renderStylePreview(type.style || 'solid', type.color)}
+                <span className="text-xs text-gray-500">
+                  {type.defaultDirectionality === 'directed' && '→'}
+                  {type.defaultDirectionality === 'bidirectional' && '↔'}
+                  {type.defaultDirectionality === 'undirected' && '—'}
+                </span>
+              </div>
+            </div>
+
+            {/* Actions */}
+            <div className="flex gap-1">
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  onDuplicate(type);
+                }}
+                className="p-1.5 text-gray-600 hover:bg-gray-100 rounded transition-colors focus:outline-none focus:ring-2 focus:ring-gray-500"
+                aria-label={`Duplicate ${type.label}`}
+                title="Duplicate"
+              >
+                <ContentCopyIcon fontSize="small" />
+              </button>
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  onDelete(type.id);
+                }}
+                className="p-1.5 text-red-600 hover:bg-red-50 rounded transition-colors focus:outline-none focus:ring-2 focus:ring-red-500"
+                aria-label={`Delete ${type.label}`}
+                title="Delete"
+              >
+                <DeleteIcon fontSize="small" />
+              </button>
+            </div>
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+};
+
+export default EdgeTypeManagementList;

src/components/Config/EditEdgeTypeInline.tsx

@@ -0,0 +1,121 @@
+import { useState, useEffect, useRef, KeyboardEvent } from 'react';
+import SaveIcon from '@mui/icons-material/Save';
+import EdgeTypeFormFields from './EdgeTypeFormFields';
+import type { EdgeTypeConfig, EdgeDirectionality } from '../../types';
+
+/**
+ * EditEdgeTypeInline - Inline edit view that replaces the right column
+ *
+ * Features:
+ * - Replaces management list in right column when editing
+ * - Reuses EdgeTypeFormFields
+ * - Save/Cancel actions
+ * - Keyboard accessible (Cmd/Ctrl+Enter to save, Escape to cancel)
+ */
+
+interface Props {
+  type: EdgeTypeConfig;
+  onSave: (
+    id: string,
+    updates: {
+      label: string;
+      color: string;
+      style: 'solid' | 'dashed' | 'dotted';
+      defaultDirectionality: EdgeDirectionality;
+    }
+  ) => void;
+  onCancel: () => void;
+}
+
+const EditEdgeTypeInline = ({ type, onSave, onCancel }: Props) => {
+  const [name, setName] = useState('');
+  const [color, setColor] = useState('#6366f1');
+  const [style, setStyle] = useState<'solid' | 'dashed' | 'dotted'>('solid');
+  const [defaultDirectionality, setDefaultDirectionality] = useState<EdgeDirectionality>('directed');
+
+  const nameInputRef = useRef<HTMLInputElement>(null);
+
+  // Sync state with type prop
+  useEffect(() => {
+    if (type) {
+      setName(type.label);
+      setColor(type.color);
+      setStyle(type.style || 'solid');
+      setDefaultDirectionality(type.defaultDirectionality || 'directed');
+    }
+  }, [type]);
+
+  const handleSave = () => {
+    if (!name.trim()) {
+      nameInputRef.current?.focus();
+      return;
+    }
+
+    onSave(type.id, {
+      label: name.trim(),
+      color,
+      style,
+      defaultDirectionality,
+    });
+  };
+
+  const handleKeyDown = (e: KeyboardEvent) => {
+    if (e.key === 'Enter' && (e.metaKey || e.ctrlKey)) {
+      e.preventDefault();
+      handleSave();
+    } else if (e.key === 'Escape') {
+      e.preventDefault();
+      onCancel();
+    }
+  };
+
+  return (
+    <div className="flex flex-col min-h-full">
+      {/* Form Fields */}
+      <div className="flex-1 mb-6">
+        <EdgeTypeFormFields
+          name={name}
+          color={color}
+          style={style}
+          defaultDirectionality={defaultDirectionality}
+          onNameChange={setName}
+          onColorChange={setColor}
+          onStyleChange={setStyle}
+          onDefaultDirectionalityChange={setDefaultDirectionality}
+          onKeyDown={handleKeyDown}
+          nameInputRef={nameInputRef}
+          autoFocusName={true}
+        />
+      </div>
+
+      {/* Actions */}
+      <div className="pt-6 space-y-3">
+        <div className="flex gap-3">
+          <button
+            onClick={onCancel}
+            className="flex-1 px-6 py-3 text-sm font-medium text-gray-700 bg-gray-100 rounded-md hover:bg-gray-200 transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500"
+          >
+            Cancel
+          </button>
+          <button
+            onClick={handleSave}
+            className="flex-1 px-6 py-3 text-sm font-medium text-white bg-blue-600 rounded-md hover:bg-blue-700 transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 flex items-center justify-center gap-2"
+          >
+            <SaveIcon fontSize="small" />
+            Save Changes
+          </button>
+        </div>
+
+        {/* Keyboard Shortcut Hint */}
+        <div className="text-xs text-gray-500 text-center">
+          <kbd className="px-1.5 py-0.5 bg-gray-100 border border-gray-300 rounded text-xs">
+            {navigator.platform.includes('Mac') ? 'Cmd' : 'Ctrl'}+Enter
+          </kbd>{' '}
+          to save, <kbd className="px-1.5 py-0.5 bg-gray-100 border border-gray-300 rounded text-xs">Esc</kbd> to cancel
+        </div>
+      </div>
+    </div>
+  );
+};
+
+export default EditEdgeTypeInline;

src/components/Config/NodeTypeConfig.tsx

@@ -1,17 +1,23 @@
 import { useState } from 'react';
 import { useGraphWithHistory } from '../../hooks/useGraphWithHistory';
-import NodeTypeForm from './NodeTypeForm';
 import { useConfirm } from '../../hooks/useConfirm';
-import type { NodeTypeConfig } from '../../types';
+import { useToastStore } from '../../stores/toastStore';
+import QuickAddTypeForm from './QuickAddTypeForm';
+import TypeManagementList from './TypeManagementList';
+import EditTypeInline from './EditTypeInline';
+import type { NodeTypeConfig, NodeShape } from '../../types';
 
 /**
  * NodeTypeConfig - Modal for managing actor/node types
  *
  * Features:
- * - Add new node types with custom name and color
- * - Edit existing node types
- * - Delete node types
- * - Color picker for visual customization
+ * - Two-column layout: quick add (left) + management/edit (right)
+ * - Progressive disclosure for advanced options
+ * - Inline editing replaces right column
+ * - Compact card-based management list
+ * - Type duplication support
+ * - Toast notifications for actions
+ * - Full keyboard accessibility
  */
 
 interface Props {
@@ -22,55 +28,34 @@ interface Props {
 const NodeTypeConfigModal = ({ isOpen, onClose }: Props) => {
   const { nodeTypes, addNodeType, updateNodeType, deleteNodeType } = useGraphWithHistory();
   const { confirm, ConfirmDialogComponent } = useConfirm();
+  const { showToast } = useToastStore();
 
-  const [newTypeName, setNewTypeName] = useState('');
-  const [newTypeColor, setNewTypeColor] = useState('#6366f1');
-  const [newTypeShape, setNewTypeShape] = useState<import('../../types').NodeShape>('rectangle');
-  const [newTypeDescription, setNewTypeDescription] = useState('');
-  const [newTypeIcon, setNewTypeIcon] = useState('');
+  const [editingType, setEditingType] = useState<NodeTypeConfig | null>(null);
 
-  // Editing state
-  const [editingId, setEditingId] = useState<string | null>(null);
-  const [editLabel, setEditLabel] = useState('');
-  const [editColor, setEditColor] = useState('');
-  const [editShape, setEditShape] = useState<import('../../types').NodeShape>('rectangle');
-  const [editIcon, setEditIcon] = useState('');
-  const [editDescription, setEditDescription] = useState('');
-
-  const handleAddType = () => {
-    if (!newTypeName.trim()) {
-      alert('Please enter a name for the node type');
-      return;
-    }
-
-    const id = newTypeName.toLowerCase().replace(/\s+/g, '-');
+  const handleAddType = (type: { name: string; color: string; shape: NodeShape; icon: string; description: string }) => {
+    const id = type.name.toLowerCase().replace(/\s+/g, '-');
 
     // Check if ID already exists
     if (nodeTypes.some(nt => nt.id === id)) {
-      alert('A node type with this name already exists');
+      showToast('A node type with this name already exists', 'error');
       return;
     }
 
     const newType: NodeTypeConfig = {
       id,
-      label: newTypeName.trim(),
-      color: newTypeColor,
-      shape: newTypeShape,
-      icon: newTypeIcon || undefined,
-      description: newTypeDescription.trim() || undefined,
+      label: type.name,
+      color: type.color,
+      shape: type.shape,
+      icon: type.icon || undefined,
+      description: type.description || undefined,
     };
 
     addNodeType(newType);
-
-    // Reset form
-    setNewTypeName('');
-    setNewTypeColor('#6366f1');
-    setNewTypeShape('rectangle');
-    setNewTypeDescription('');
-    setNewTypeIcon('');
+    showToast(`Actor type "${type.name}" created`, 'success');
   };
 
   const handleDeleteType = async (id: string) => {
+    const type = nodeTypes.find(t => t.id === id);
     const confirmed = await confirm({
       title: 'Delete Actor Type',
       message: 'Are you sure you want to delete this actor type? This action cannot be undone.',
@@ -79,166 +64,137 @@ const NodeTypeConfigModal = ({ isOpen, onClose }: Props) => {
     });
     if (confirmed) {
       deleteNodeType(id);
+      showToast(`Actor type "${type?.label}" deleted`, 'success');
     }
   };
 
   const handleEditType = (type: NodeTypeConfig) => {
-    setEditingId(type.id);
-    setEditLabel(type.label);
-    setEditColor(type.color);
-    setEditShape(type.shape || 'rectangle');
-    setEditIcon(type.icon || '');
-    setEditDescription(type.description || '');
+    setEditingType(type);
   };
 
-  const handleSaveEdit = () => {
-    if (!editingId || !editLabel.trim()) return;
-
-    updateNodeType(editingId, {
-      label: editLabel.trim(),
-      color: editColor,
-      shape: editShape,
-      icon: editIcon || undefined,
-      description: editDescription.trim() || undefined,
-    });
-
-    setEditingId(null);
+  const handleSaveEdit = (id: string, updates: { label: string; color: string; shape: NodeShape; icon?: string; description?: string }) => {
+    updateNodeType(id, updates);
+    setEditingType(null);
+    showToast(`Actor type "${updates.label}" updated`, 'success');
   };
 
   const handleCancelEdit = () => {
-    setEditingId(null);
+    setEditingType(null);
+  };
+
+  const handleDuplicateType = (type: NodeTypeConfig) => {
+    // Generate a unique ID for the duplicate
+    let suffix = 2;
+    let newId = `${type.id}-copy`;
+    let newLabel = `${type.label} (Copy)`;
+
+    while (nodeTypes.some(nt => nt.id === newId)) {
+      newId = `${type.id}-copy-${suffix}`;
+      newLabel = `${type.label} (Copy ${suffix})`;
+      suffix++;
+    }
+
+    const duplicatedType: NodeTypeConfig = {
+      id: newId,
+      label: newLabel,
+      color: type.color,
+      shape: type.shape,
+      icon: type.icon,
+      description: type.description,
+    };
+
+    addNodeType(duplicatedType);
+    showToast(`Actor type duplicated as "${newLabel}"`, 'success');
   };
 
   if (!isOpen) return null;
 
   return (
+    <>
+      {/* Main Modal */}
       <div className="fixed inset-0 bg-black bg-opacity-50 flex items-center justify-center z-50">
-      <div className="bg-white rounded-lg shadow-xl w-full max-w-2xl max-h-[80vh] overflow-hidden flex flex-col">
+        <div className="bg-white rounded-lg shadow-xl w-full max-w-5xl max-h-[85vh] overflow-hidden flex flex-col">
           {/* Header */}
           <div className="px-6 py-4 border-b border-gray-200">
             <h2 className="text-xl font-bold text-gray-900">Configure Actor Types</h2>
             <p className="text-sm text-gray-600 mt-1">
-            Customize the types of actors that can be added to your constellation
+              Quickly add and manage the types of actors in your constellation
             </p>
           </div>
 
-        {/* Content */}
-        <div className="flex-1 overflow-y-auto p-6">
-          {/* Add New Type Form */}
-          <div className="bg-gray-50 rounded-lg p-4 mb-6">
-            <h3 className="text-sm font-semibold text-gray-700 mb-3">Add New Actor Type</h3>
-            <NodeTypeForm
-              name={newTypeName}
-              color={newTypeColor}
-              shape={newTypeShape}
-              icon={newTypeIcon}
-              description={newTypeDescription}
-              onNameChange={setNewTypeName}
-              onColorChange={setNewTypeColor}
-              onShapeChange={setNewTypeShape}
-              onIconChange={setNewTypeIcon}
-              onDescriptionChange={setNewTypeDescription}
+          {/* Content - Two-Column or Full-Width Edit */}
+          <div className="flex-1 overflow-hidden flex">
+            {editingType ? (
+              /* Full-Width Edit Mode */
+              <div className="w-full p-6 overflow-y-auto">
+                <div className="max-w-2xl mx-auto">
+                  <EditTypeInline
+                    type={editingType}
+                    onSave={handleSaveEdit}
+                    onCancel={handleCancelEdit}
                   />
-            <button
-              onClick={handleAddType}
-              className="w-full mt-3 px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-md hover:bg-blue-700 transition-colors"
-            >
-              Add Actor Type
-            </button>
-          </div>
-
-          {/* Existing Types List */}
-          <div>
-            <h3 className="text-sm font-semibold text-gray-700 mb-3">Existing Actor Types</h3>
-            <div className="space-y-2">
-              {nodeTypes.map((type) => (
-                <div
-                  key={type.id}
-                  className="border border-gray-200 rounded-md overflow-hidden"
-                >
-                  {editingId === type.id ? (
-                    // Edit mode
-                    <div className="bg-blue-50 p-4">
-                      <NodeTypeForm
-                        name={editLabel}
-                        color={editColor}
-                        shape={editShape}
-                        icon={editIcon}
-                        description={editDescription}
-                        onNameChange={setEditLabel}
-                        onColorChange={setEditColor}
-                        onShapeChange={setEditShape}
-                        onIconChange={setEditIcon}
-                        onDescriptionChange={setEditDescription}
-                      />
-                      <div className="flex space-x-2 mt-3">
-                        <button
-                          onClick={handleSaveEdit}
-                          className="flex-1 px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-md hover:bg-blue-700 transition-colors"
-                        >
-                          Save
-                        </button>
-                        <button
-                          onClick={handleCancelEdit}
-                          className="flex-1 px-4 py-2 bg-gray-200 text-gray-800 text-sm font-medium rounded-md hover:bg-gray-300 transition-colors"
-                        >
-                          Cancel
-                        </button>
                 </div>
               </div>
             ) : (
-                    // View mode
-                    <div className="flex items-center justify-between p-3 hover:bg-gray-50 transition-colors">
-                      <div className="flex items-center space-x-3 flex-1">
-                        <div
-                          className="w-8 h-8 rounded"
-                          style={{ backgroundColor: type.color }}
-                        />
-                        <div className="flex-1">
-                          <div className="text-sm font-medium text-gray-900">
-                            {type.label}
-                          </div>
-                          {type.description && (
-                            <div className="text-xs text-gray-500">{type.description}</div>
-                          )}
-                        </div>
-                      </div>
-                      <div className="flex space-x-2">
-                        <button
-                          onClick={() => handleEditType(type)}
-                          className="px-3 py-1 text-sm text-blue-600 hover:bg-blue-50 rounded transition-colors"
-                        >
-                          Edit
-                        </button>
-                        <button
-                          onClick={() => handleDeleteType(type.id)}
-                          className="px-3 py-1 text-sm text-red-600 hover:bg-red-50 rounded transition-colors"
-                        >
-                          Delete
-                        </button>
-                      </div>
-                    </div>
-                  )}
-                </div>
-              ))}
+              <>
+                {/* Left Column - Quick Add (60%) */}
+                <div className="w-3/5 border-r border-gray-200 p-6 overflow-y-auto">
+                  <div>
+                    <h3 className="text-sm font-semibold text-gray-700 mb-4">
+                      Quick Add Actor Type
+                    </h3>
+                    <QuickAddTypeForm onAdd={handleAddType} />
                   </div>
+
+                  {/* Helper Text */}
+                  <div className="mt-6 p-4 bg-blue-50 border border-blue-200 rounded-lg">
+                    <h4 className="text-sm font-semibold text-blue-900 mb-1">Pro Tips</h4>
+                    <ul className="text-xs text-blue-800 space-y-1">
+                      <li>• Press <kbd className="px-1 py-0.5 bg-white border border-blue-300 rounded text-xs">Enter</kbd> to quickly add a type</li>
+                      <li>• Shape and icon are optional - focus on name and color first</li>
+                      <li>• Click any type on the right to edit it</li>
+                      <li>• Use duplicate to create variations quickly</li>
+                    </ul>
                   </div>
                 </div>
 
-        {/* Footer */}
+                {/* Right Column - Management (40%) */}
+                <div className="w-2/5 p-6 overflow-y-auto bg-gray-50">
+                  <div>
+                    <div className="flex items-center justify-between mb-4">
+                      <h3 className="text-sm font-semibold text-gray-700">
+                        Actor Types ({nodeTypes.length})
+                      </h3>
+                    </div>
+                    <TypeManagementList
+                      types={nodeTypes}
+                      onEdit={handleEditType}
+                      onDelete={handleDeleteType}
+                      onDuplicate={handleDuplicateType}
+                    />
+                  </div>
+                </div>
+              </>
+            )}
+          </div>
+
+          {/* Footer - Hidden when editing */}
+          {!editingType && (
             <div className="px-6 py-4 border-t border-gray-200 flex justify-end">
               <button
                 onClick={onClose}
-            className="px-4 py-2 bg-gray-200 text-gray-800 text-sm font-medium rounded-md hover:bg-gray-300 transition-colors"
+                className="px-4 py-2 bg-gray-200 text-gray-800 text-sm font-medium rounded-md hover:bg-gray-300 transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
               >
-            Close
+                Done
               </button>
             </div>
+          )}
+        </div>
       </div>
 
       {/* Confirmation Dialog */}
       {ConfirmDialogComponent}
-    </div>
+    </>
   );
 };
 

src/components/Config/QuickAddEdgeTypeForm.tsx

@@ -0,0 +1,97 @@
+import { useState, useRef, KeyboardEvent } from 'react';
+import AddIcon from '@mui/icons-material/Add';
+import EdgeTypeFormFields from './EdgeTypeFormFields';
+import type { EdgeDirectionality } from '../../types';
+
+/**
+ * QuickAddEdgeTypeForm - Quick add form for new relation types
+ *
+ * Features:
+ * - Compact form using EdgeTypeFormFields
+ * - Keyboard accessible (Cmd/Ctrl+Enter to add)
+ * - Auto-clears after successful add
+ * - Focus management
+ */
+
+interface Props {
+  onAdd: (data: {
+    label: string;
+    color: string;
+    style: 'solid' | 'dashed' | 'dotted';
+    defaultDirectionality: EdgeDirectionality;
+  }) => void;
+}
+
+const QuickAddEdgeTypeForm = ({ onAdd }: Props) => {
+  const [name, setName] = useState('');
+  const [color, setColor] = useState('#6366f1');
+  const [style, setStyle] = useState<'solid' | 'dashed' | 'dotted'>('solid');
+  const [defaultDirectionality, setDefaultDirectionality] = useState<EdgeDirectionality>('directed');
+
+  const nameInputRef = useRef<HTMLInputElement>(null);
+
+  const handleAdd = () => {
+    if (!name.trim()) {
+      nameInputRef.current?.focus();
+      return;
+    }
+
+    onAdd({
+      label: name.trim(),
+      color,
+      style,
+      defaultDirectionality,
+    });
+
+    // Reset form
+    setName('');
+    setColor('#6366f1');
+    setStyle('solid');
+    setDefaultDirectionality('directed');
+    nameInputRef.current?.focus();
+  };
+
+  const handleKeyDown = (e: KeyboardEvent) => {
+    if (e.key === 'Enter' && (e.metaKey || e.ctrlKey)) {
+      e.preventDefault();
+      handleAdd();
+    }
+  };
+
+  return (
+    <div className="bg-gray-50 rounded-lg p-4">
+      <h3 className="text-sm font-semibold text-gray-700 mb-3">Add New Relation Type</h3>
+
+      <EdgeTypeFormFields
+        name={name}
+        color={color}
+        style={style}
+        defaultDirectionality={defaultDirectionality}
+        onNameChange={setName}
+        onColorChange={setColor}
+        onStyleChange={setStyle}
+        onDefaultDirectionalityChange={setDefaultDirectionality}
+        onKeyDown={handleKeyDown}
+        nameInputRef={nameInputRef}
+        autoFocusName={false}
+      />
+
+      <button
+        onClick={handleAdd}
+        className="w-full mt-4 px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-md hover:bg-blue-700 transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2 flex items-center justify-center gap-2"
+      >
+        <AddIcon fontSize="small" />
+        Add Relation Type
+      </button>
+
+      <div className="text-xs text-gray-500 text-center mt-2">
+        <kbd className="px-1.5 py-0.5 bg-gray-100 border border-gray-300 rounded text-xs">
+          {navigator.platform.includes('Mac') ? 'Cmd' : 'Ctrl'}+Enter
+        </kbd>{' '}
+        to add
+      </div>
+    </div>
+  );
+};
+
+export default QuickAddEdgeTypeForm;

src/components/Config/QuickAddTypeForm.tsx

@@ -0,0 +1,106 @@
+import { useState, useRef, KeyboardEvent } from 'react';
+import TypeFormFields from './TypeFormFields';
+import type { NodeShape } from '../../types';
+
+/**
+ * QuickAddTypeForm - Streamlined form for quickly adding new actor types
+ *
+ * Features:
+ * - One-line quick add (name + color + button)
+ * - Progressive disclosure for advanced options
+ * - Keyboard accessible (Enter to submit, Escape to cancel)
+ * - Focus management
+ */
+
+interface Props {
+  onAdd: (type: {
+    name: string;
+    color: string;
+    shape: NodeShape;
+    icon: string;
+    description: string;
+  }) => void;
+}
+
+const QuickAddTypeForm = ({ onAdd }: Props) => {
+  const [name, setName] = useState('');
+  const [color, setColor] = useState('#6366f1');
+  const [shape, setShape] = useState<NodeShape>('rectangle');
+  const [icon, setIcon] = useState('');
+  const [description, setDescription] = useState('');
+
+  const nameInputRef = useRef<HTMLInputElement>(null);
+
+  const handleSubmit = () => {
+    if (!name.trim()) {
+      nameInputRef.current?.focus();
+      return;
+    }
+
+    onAdd({ name: name.trim(), color, shape, icon, description });
+
+    // Reset form
+    setName('');
+    setColor('#6366f1');
+    setShape('rectangle');
+    setIcon('');
+    setDescription('');
+
+    // Focus back to name input for quick subsequent additions
+    nameInputRef.current?.focus();
+  };
+
+  const handleKeyDown = (e: KeyboardEvent) => {
+    if (e.key === 'Enter' && !e.shiftKey) {
+      e.preventDefault();
+      handleSubmit();
+    } else if (e.key === 'Escape') {
+      e.preventDefault();
+      // Reset form
+      setName('');
+      setColor('#6366f1');
+      setShape('rectangle');
+      setIcon('');
+      setDescription('');
+      nameInputRef.current?.blur();
+    }
+  };
+
+  return (
+    <div className="space-y-3">
+      <TypeFormFields
+        name={name}
+        color={color}
+        shape={shape}
+        icon={icon}
+        description={description}
+        onNameChange={setName}
+        onColorChange={setColor}
+        onShapeChange={setShape}
+        onIconChange={setIcon}
+        onDescriptionChange={setDescription}
+        onKeyDown={handleKeyDown}
+        nameInputRef={nameInputRef}
+        autoFocusName={false}
+        showAdvancedByDefault={false}
+      />
+
+      <button
+        onClick={handleSubmit}
+        className="w-full px-4 py-2 bg-blue-600 text-white text-sm font-medium rounded-md hover:bg-blue-700 transition-colors focus:outline-none focus:ring-2 focus:ring-blue-500 focus:ring-offset-2"
+        aria-label="Add actor type"
+      >
+        Add Type
+      </button>
+
+      {/* Keyboard Shortcuts Hint */}
+      {name && (
+        <div className="text-xs text-gray-500 italic">
+          Press Enter to add, Escape to cancel
+        </div>
+      )}
+    </div>
+  );
+};
+
+export default QuickAddTypeForm;

src/components/Config/ShapeSelector.tsx

@@ -49,10 +49,10 @@ const SHAPE_OPTIONS: ShapeOption[] = [
 const ShapeSelector = ({ value, onChange, color = '#3b82f6' }: ShapeSelectorProps) => {
   return (
     <div className="space-y-2">
-      <label className="block text-sm font-medium text-gray-700">
-        Shape
+      <label className="block text-xs font-medium text-gray-700">
+        Shape (optional)
       </label>
-      <div className="grid grid-cols-3 gap-3">
+      <div className="grid grid-cols-5 gap-2">
         {SHAPE_OPTIONS.map((option) => {
           const isSelected = value === option.id;
           return (
@@ -61,27 +61,30 @@ const ShapeSelector = ({ value, onChange, color = '#3b82f6' }: ShapeSelectorProp
               type="button"
               onClick={() => onChange(option.id)}
               className={`
-                relative p-3 rounded-lg border-2 transition-all
+                relative p-2 rounded-md border-2 transition-all
                 hover:border-blue-400 hover:bg-blue-50
+                focus:outline-none focus:ring-2 focus:ring-blue-500
                 ${isSelected ? 'border-blue-500 bg-blue-50' : 'border-gray-300 bg-white'}
               `}
               title={option.description}
+              aria-label={option.label}
+              aria-pressed={isSelected}
             >
               {/* Shape Preview */}
-              <div className="flex justify-center items-center h-12 mb-2">
-                <ShapePreview shape={option.id} color={color} size={40} />
+              <div className="flex justify-center items-center h-8">
+                <ShapePreview shape={option.id} color={color} size={28} />
               </div>
 
               {/* Shape Label */}
-              <div className="text-xs text-center text-gray-700 font-medium">
-                {option.label}
+              <div className="text-xs text-center text-gray-700 font-medium mt-1 truncate">
+                {option.label.split(' ')[0]}
               </div>
 
               {/* Selected Indicator */}
               {isSelected && (
-                <div className="absolute top-1 right-1 w-4 h-4 bg-blue-500 rounded-full flex items-center justify-center">
+                <div className="absolute top-0.5 right-0.5 w-3 h-3 bg-blue-500 rounded-full flex items-center justify-center">
                   <svg
-                    className="w-3 h-3 text-white"
+                    className="w-2 h-2 text-white"
                     fill="none"
                     viewBox="0 0 24 24"
                     stroke="currentColor"

src/components/Config/TypeManagementList.tsx

@@ -0,0 +1,106 @@
+import DeleteIcon from '@mui/icons-material/Delete';
+import ContentCopyIcon from '@mui/icons-material/ContentCopy';
+import type { NodeTypeConfig } from '../../types';
+
+/**
+ * TypeManagementList - Compact list view for managing existing actor types
+ *
+ * Features:
+ * - White background cards with click to edit
+ * - Color badge + name + description preview
+ * - Always visible duplicate and delete buttons
+ * - Keyboard accessible
+ * - ARIA compliant
+ */
+
+interface Props {
+  types: NodeTypeConfig[];
+  onEdit: (type: NodeTypeConfig) => void;
+  onDelete: (id: string) => void;
+  onDuplicate: (type: NodeTypeConfig) => void;
+}
+
+const TypeManagementList = ({ types, onEdit, onDelete, onDuplicate }: Props) => {
+
+  if (types.length === 0) {
+    return (
+      <div className="text-center py-12 text-gray-500">
+        <p className="text-sm">No actor types yet.</p>
+        <p className="text-xs mt-1">Add your first actor type above.</p>
+      </div>
+    );
+  }
+
+  return (
+    <div className="space-y-2">
+      {types.map((type) => (
+        <div
+          key={type.id}
+          className="group bg-white border border-gray-200 rounded-lg p-3 hover:border-blue-300 hover:shadow-sm transition-all cursor-pointer"
+          onClick={() => onEdit(type)}
+          role="button"
+          tabIndex={0}
+          onKeyDown={(e) => {
+            if (e.key === 'Enter' || e.key === ' ') {
+              e.preventDefault();
+              onEdit(type);
+            }
+          }}
+          aria-label={`Edit ${type.label}`}
+        >
+          <div className="flex items-start justify-between gap-3">
+            {/* Type Info */}
+            <div className="flex items-center gap-3 flex-1 min-w-0">
+              {/* Color Badge */}
+              <div
+                className="w-10 h-10 rounded flex-shrink-0"
+                style={{ backgroundColor: type.color }}
+                aria-hidden="true"
+              />
+
+              {/* Name & Description */}
+              <div className="flex-1 min-w-0">
+                <div className="text-sm font-medium text-gray-900">
+                  {type.label}
+                </div>
+                {type.description && (
+                  <div className="text-xs text-gray-500 truncate mt-0.5">
+                    {type.description}
+                  </div>
+                )}
+              </div>
+            </div>
+
+            {/* Actions */}
+            <div className="flex gap-1">
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  onDuplicate(type);
+                }}
+                className="p-1.5 text-gray-600 hover:bg-gray-100 rounded transition-colors focus:outline-none focus:ring-2 focus:ring-gray-500"
+                aria-label={`Duplicate ${type.label}`}
+                title="Duplicate"
+              >
+                <ContentCopyIcon fontSize="small" />
+              </button>
+              <button
+                onClick={(e) => {
+                  e.stopPropagation();
+                  onDelete(type.id);
+                }}
+                className="p-1.5 text-red-600 hover:bg-red-50 rounded transition-colors focus:outline-none focus:ring-2 focus:ring-red-500"
+                aria-label={`Delete ${type.label}`}
+                title="Delete"
+              >
+                <DeleteIcon fontSize="small" />
+              </button>
+            </div>
+          </div>
+        </div>
+      ))}
+    </div>
+  );
+};
+
+export default TypeManagementList;

src/styles/index.css

@@ -48,3 +48,19 @@ code {
 button {
   transition: all 0.2s ease-in-out;
 }
+
+/* Slide-in animation for edit panel */
+@keyframes slideInLeft {
+  from {
+    transform: translateX(-100%);
+    opacity: 0;
+  }
+  to {
+    transform: translateX(0);
+    opacity: 1;
+  }
+}
+
+.animate-slide-in-left {
+  animation: slideInLeft 0.3s ease-out forwards;
+}