Changes before error encountered

Co-authored-by: hotlong <50353452+hotlong@users.noreply.github.com>

Author: Copilot

packages/designer/README.md

@@ -1,6 +1,14 @@
 # @object-ui/designer
 
-A professional drag-and-drop visual editor to generate Object UI schemas with advanced features including **component resizing**.
+A professional drag-and-drop visual editor to generate Object UI schemas with advanced features including **component resizing** and **specialized designers**.
+
+## 🎯 Specialized Designers
+
+Object UI Designer now includes three specialized designer modes optimized for different use cases:
+
+- **General Designer** - The original all-purpose designer with all component types
+- **Form Designer** (专用对象表单设计器) - Purpose-built for creating forms with validation and field controls
+- **Page Layout Designer** (页面布局设计器) - Optimized for building page structures with sections, headers, and grids
 
 ## Features
 
@@ -68,7 +76,9 @@ pnpm add @object-ui/designer @object-ui/react @object-ui/components
 
 ## Usage
 
-### Basic Example
+### General Designer (All Components)
+
+The default designer with access to all component types:
 
 ```tsx
 import { Designer } from '@object-ui/designer';
@@ -91,6 +101,68 @@ function App() {
 }
 ```
 
+### Form Designer (专用对象表单设计器)
+
+A specialized designer optimized for creating forms with form-specific components:
+
+```tsx
+import { FormDesigner } from '@object-ui/designer';
+import { useState } from 'react';
+import type { SchemaNode } from '@object-ui/core';
+
+function App() {
+  const [formSchema, setFormSchema] = useState<SchemaNode>({
+    type: 'form',
+    className: 'p-8 max-w-2xl mx-auto',
+    body: []
+  });
+  
+  return (
+    <FormDesigner 
+      initialSchema={formSchema} 
+      onSchemaChange={setFormSchema}
+    />
+  );
+}
+```
+
+**Features:**
+- Form-specific component palette (text inputs, email, password, number, checkboxes, selects, etc.)
+- Form validation preview
+- Quick access to common form field types
+- Form submission configuration
+
+### Page Layout Designer (页面布局设计器)
+
+A specialized designer optimized for building page layouts and structures:
+
+```tsx
+import { PageLayoutDesigner } from '@object-ui/designer';
+import { useState } from 'react';
+import type { SchemaNode } from '@object-ui/core';
+
+function App() {
+  const [pageSchema, setPageSchema] = useState<SchemaNode>({
+    type: 'div',
+    className: 'min-h-screen bg-white',
+    body: []
+  });
+  
+  return (
+    <PageLayoutDesigner 
+      initialSchema={pageSchema} 
+      onSchemaChange={setPageSchema}
+    />
+  );
+}
+```
+
+**Features:**
+- Layout-focused component palette (header, footer, main, aside, sections, grids, columns)
+- Responsive viewport preview (desktop/tablet/mobile)
+- Grid overlay toggle for precise alignment
+- Layout-specific property controls
+
 ### With Initial Schema
 
 ```tsx

packages/designer/src/components/FormComponentPalette.tsx

@@ -0,0 +1,258 @@
+import React, { useState } from 'react';
+import { ComponentRegistry } from '@object-ui/core';
+import { useDesigner } from '../context/DesignerContext';
+import { 
+  Type, 
+  CheckSquare, 
+  ToggleLeft,
+  List,
+  FileText,
+  Calendar,
+  Mail,
+  Phone,
+  Lock,
+  Hash,
+  DollarSign,
+  Link2,
+  MousePointer2,
+  Search,
+  Tag
+} from 'lucide-react';
+import { cn } from '@object-ui/components';
+import { ScrollArea } from '@object-ui/components';
+import { enableTouchDrag, isTouchDevice } from '../utils/touchDragPolyfill';
+
+interface FormComponentPaletteProps {
+  className?: string;
+}
+
+// Map form component types to Lucide icons
+const getIconForType = (type: string) => {
+  switch (type) {
+    case 'input': return Type;
+    case 'textarea': return FileText;
+    case 'checkbox': return CheckSquare;
+    case 'switch': return ToggleLeft;
+    case 'select': return List;
+    case 'button': return MousePointer2;
+    case 'label': return Tag;
+    case 'date-picker': return Calendar;
+    case 'email-input': return Mail;
+    case 'phone-input': return Phone;
+    case 'password-input': return Lock;
+    case 'number-input': return Hash;
+    case 'url-input': return Link2;
+    case 'search-input': return Search;
+    case 'currency-input': return DollarSign;
+    default: return Type;
+  }
+};
+
+// Form-specific component categories
+const FORM_CATEGORIES = {
+  'Text Fields': [
+    { type: 'input', label: 'Text Input', description: 'Single line text input' },
+    { type: 'textarea', label: 'Text Area', description: 'Multi-line text input' },
+    { type: 'email-input', label: 'Email', description: 'Email address input' },
+    { type: 'password-input', label: 'Password', description: 'Password input field' },
+    { type: 'url-input', label: 'URL', description: 'URL input field' },
+    { type: 'search-input', label: 'Search', description: 'Search input field' },
+  ],
+  'Number Fields': [
+    { type: 'number-input', label: 'Number', description: 'Numeric input' },
+    { type: 'currency-input', label: 'Currency', description: 'Money/currency input' },
+  ],
+  'Selection': [
+    { type: 'checkbox', label: 'Checkbox', description: 'Single checkbox' },
+    { type: 'switch', label: 'Switch', description: 'Toggle switch' },
+    { type: 'select', label: 'Select', description: 'Dropdown selection' },
+  ],
+  'Other': [
+    { type: 'date-picker', label: 'Date Picker', description: 'Date selection' },
+    { type: 'phone-input', label: 'Phone', description: 'Phone number input' },
+    { type: 'label', label: 'Label', description: 'Form field label' },
+    { type: 'button', label: 'Button', description: 'Action button' },
+  ]
+};
+
+// Component item with touch support
+interface ComponentItemProps {
+  type: string;
+  label: string;
+  description: string;
+  Icon: any;
+  onDragStart: (e: React.DragEvent, type: string) => void;
+  onDragEnd: () => void;
+}
+
+const ComponentItem: React.FC<ComponentItemProps> = React.memo(({ 
+  type, 
+  label,
+  description,
+  Icon, 
+  onDragStart, 
+  onDragEnd 
+}) => {
+  const itemRef = React.useRef<HTMLDivElement>(null);
+  const { setDraggingType } = useDesigner();
+
+  // Setup touch drag support
+  React.useEffect(() => {
+    if (!itemRef.current || !isTouchDevice()) return;
+
+    const cleanup = enableTouchDrag(itemRef.current, {
+      dragData: { componentType: type },
+      onDragStart: () => {
+        setDraggingType(type);
+      },
+      onDragEnd: () => {
+        setDraggingType(null);
+      }
+    });
+
+    return cleanup;
+  }, [type, setDraggingType]);
+
+  return (
+    <div
+      ref={itemRef}
+      draggable
+      onDragStart={(e) => onDragStart(e, type)}
+      onDragEnd={onDragEnd}
+      className={cn(
+        "group flex items-center gap-3 p-3 rounded-lg border-2 border-transparent hover:border-indigo-200 hover:bg-gradient-to-br hover:from-indigo-50 hover:to-purple-50 hover:shadow-md cursor-grab active:cursor-grabbing transition-all duration-200 bg-white",
+        "hover:scale-102 active:scale-95 touch-none"
+      )}
+      aria-label={`${label} - ${description}`}
+    >
+      <div className="flex-shrink-0 w-8 h-8 rounded-md bg-indigo-100 flex items-center justify-center group-hover:bg-indigo-200 transition-colors">
+        <Icon className="w-4 h-4 text-indigo-600" />
+      </div>
+      <div className="flex-1 min-w-0">
+        <div className="text-sm font-medium text-gray-900 truncate">{label}</div>
+        <div className="text-xs text-gray-500 truncate">{description}</div>
+      </div>
+    </div>
+  );
+});
+
+ComponentItem.displayName = 'ComponentItem';
+
+/**
+ * FormComponentPalette Component
+ * A specialized component palette for form fields and controls
+ */
+export const FormComponentPalette: React.FC<FormComponentPaletteProps> = ({ className }) => {
+  const { setDraggingType } = useDesigner();
+  const [searchQuery, setSearchQuery] = useState('');
+  const [expandedCategories, setExpandedCategories] = useState<Set<string>>(
+    new Set(Object.keys(FORM_CATEGORIES))
+  );
+
+  const handleDragStart = (e: React.DragEvent, type: string) => {
+    e.dataTransfer.effectAllowed = 'copy';
+    e.dataTransfer.setData('application/json', JSON.stringify({ componentType: type }));
+    setDraggingType(type);
+  };
+
+  const handleDragEnd = () => {
+    setDraggingType(null);
+  };
+
+  const toggleCategory = (category: string) => {
+    const newExpanded = new Set(expandedCategories);
+    if (newExpanded.has(category)) {
+      newExpanded.delete(category);
+    } else {
+      newExpanded.add(category);
+    }
+    setExpandedCategories(newExpanded);
+  };
+
+  // Filter components based on search
+  const filteredCategories = Object.entries(FORM_CATEGORIES).reduce((acc, [category, items]) => {
+    const filtered = items.filter(item => 
+      item.label.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      item.type.toLowerCase().includes(searchQuery.toLowerCase()) ||
+      item.description.toLowerCase().includes(searchQuery.toLowerCase())
+    );
+    if (filtered.length > 0) {
+      acc[category] = filtered;
+    }
+    return acc;
+  }, {} as Record<string, typeof FORM_CATEGORIES[keyof typeof FORM_CATEGORIES]>);
+
+  return (
+    <div className={cn("flex flex-col h-full bg-white border-r border-gray-200", className)}>
+      {/* Header */}
+      <div className="p-4 border-b border-gray-200 bg-gradient-to-r from-indigo-50 to-purple-50">
+        <h2 className="text-lg font-bold text-gray-900 mb-1">Form Components</h2>
+        <p className="text-xs text-gray-600">Drag components to canvas</p>
+      </div>
+
+      {/* Search */}
+      <div className="p-3 border-b border-gray-200">
+        <div className="relative">
+          <Search className="absolute left-3 top-1/2 -translate-y-1/2 w-4 h-4 text-gray-400" />
+          <input
+            type="text"
+            placeholder="Search components..."
+            value={searchQuery}
+            onChange={(e) => setSearchQuery(e.target.value)}
+            className="w-full pl-9 pr-3 py-2 text-sm border border-gray-300 rounded-lg focus:outline-none focus:ring-2 focus:ring-indigo-500 focus:border-transparent"
+          />
+        </div>
+      </div>
+
+      {/* Component List */}
+      <ScrollArea className="flex-1">
+        <div className="p-3 space-y-4">
+          {Object.keys(filteredCategories).length === 0 ? (
+            <div className="text-center py-8 text-gray-500 text-sm">
+              No components found
+            </div>
+          ) : (
+            Object.entries(filteredCategories).map(([category, items]) => (
+              <div key={category} className="space-y-2">
+                <button
+                  onClick={() => toggleCategory(category)}
+                  className="w-full flex items-center justify-between text-xs font-semibold text-gray-600 uppercase tracking-wider hover:text-gray-900 transition-colors"
+                >
+                  <span>{category}</span>
+                  <span className="text-gray-400">
+                    {expandedCategories.has(category) ? '▼' : '▶'}
+                  </span>
+                </button>
+                {expandedCategories.has(category) && (
+                  <div className="space-y-2">
+                    {items.map((item) => {
+                      const Icon = getIconForType(item.type);
+                      return (
+                        <ComponentItem
+                          key={item.type}
+                          type={item.type}
+                          label={item.label}
+                          description={item.description}
+                          Icon={Icon}
+                          onDragStart={handleDragStart}
+                          onDragEnd={handleDragEnd}
+                        />
+                      );
+                    })}
+                  </div>
+                )}
+              </div>
+            ))
+          )}
+        </div>
+      </ScrollArea>
+
+      {/* Footer Tip */}
+      <div className="p-3 border-t border-gray-200 bg-gray-50">
+        <p className="text-xs text-gray-600 text-center">
+          💡 Tip: Configure field validation in the property panel
+        </p>
+      </div>
+    </div>
+  );
+};