feat: Complete markdown syntax refinement and variable protection

✅ New cleaner syntax implemented:
- [card:type] instead of [card type='type']
- [button:style](url)Text[/button] instead of [button url='...' style='...']
- Standard markdown images: ![alt](url)

✅ Variable protection from markdown parsing:
- Variables with underscores (e.g., {order_items_table}) now protected
- HTML comment placeholders prevent italic/bold parsing
- All variables render correctly in preview

✅ Button rendering fixes:
- Buttons work in Visual mode inside cards
- Buttons work in Preview mode
- Button clicks prevented in visual editor
- Proper styling for solid and outline buttons

✅ Backward compatibility:
- Old syntax still supported
- No breaking changes

✅ Bug fixes:
- Fixed order_item_table → order_items_table naming
- Fixed button regex to match across newlines
- Added button/image parsing to parseMarkdownBasics
- Prevented button clicks on .button and .button-outline classes

📚 Documentation:
- NEW_MARKDOWN_SYNTAX.md - Complete user guide
- MARKDOWN_SYNTAX_AND_VARIABLES.md - Technical analysis

admin-spa/src/components/ui/markdown-toolbar.tsx

@@ -0,0 +1,232 @@
+import React, { useState } from 'react';
+import { Button } from './button';
+import { Bold, Italic, Heading1, Heading2, Link, List, ListOrdered, Quote, Code, Square, Plus, Image, MousePointer } from 'lucide-react';
+import {
+  Dialog,
+  DialogContent,
+  DialogDescription,
+  DialogHeader,
+  DialogTitle,
+  DialogTrigger,
+} from './dialog';
+import {
+  Select,
+  SelectContent,
+  SelectItem,
+  SelectTrigger,
+  SelectValue,
+} from './select';
+
+interface MarkdownToolbarProps {
+  onInsert: (before: string, after?: string) => void;
+}
+
+export function MarkdownToolbar({ onInsert }: MarkdownToolbarProps) {
+  const [showCardDialog, setShowCardDialog] = useState(false);
+  const [selectedCardType, setSelectedCardType] = useState('default');
+  const [showButtonDialog, setShowButtonDialog] = useState(false);
+  const [buttonStyle, setButtonStyle] = useState('solid');
+  const [showImageDialog, setShowImageDialog] = useState(false);
+
+  const tools = [
+    { icon: Bold, label: 'Bold', before: '**', after: '**' },
+    { icon: Italic, label: 'Italic', before: '*', after: '*' },
+    { icon: Heading1, label: 'Heading 1', before: '# ', after: '' },
+    { icon: Heading2, label: 'Heading 2', before: '## ', after: '' },
+    { icon: Link, label: 'Link', before: '[', after: '](url)' },
+    { icon: List, label: 'Bullet List', before: '- ', after: '' },
+    { icon: ListOrdered, label: 'Numbered List', before: '1. ', after: '' },
+    { icon: Quote, label: 'Quote', before: '> ', after: '' },
+    { icon: Code, label: 'Code', before: '`', after: '`' },
+  ];
+
+  const cardTypes = [
+    { value: 'default', label: 'Default', description: 'Standard white card' },
+    { value: 'hero', label: 'Hero', description: 'Large header card with gradient' },
+    { value: 'success', label: 'Success', description: 'Green success message' },
+    { value: 'warning', label: 'Warning', description: 'Yellow warning message' },
+    { value: 'info', label: 'Info', description: 'Blue information card' },
+    { value: 'basic', label: 'Basic', description: 'Minimal styling' },
+  ];
+
+  const handleInsertCard = () => {
+    const cardTemplate = selectedCardType === 'default'
+      ? '[card]\n\n## Your heading here\n\nYour content here...\n\n[/card]'
+      : `[card:${selectedCardType}]\n\n## Your heading here\n\nYour content here...\n\n[/card]`;
+    
+    onInsert(cardTemplate, '');
+    setShowCardDialog(false);
+  };
+
+  const handleInsertButton = () => {
+    const buttonTemplate = `[button:${buttonStyle}](https://example.com)Click me[/button]`;
+    onInsert(buttonTemplate, '');
+    setShowButtonDialog(false);
+  };
+
+  const handleInsertImage = () => {
+    const imageTemplate = `![Image description](https://example.com/image.jpg)`;
+    onInsert(imageTemplate, '');
+    setShowImageDialog(false);
+  };
+
+  return (
+    <div className="flex flex-wrap gap-1 p-2 border-b bg-muted/30">
+      {/* Card Insert Button with Dialog */}
+      <Dialog open={showCardDialog} onOpenChange={setShowCardDialog}>
+        <DialogTrigger asChild>
+          <Button
+            type="button"
+            variant="ghost"
+            size="sm"
+            className="h-8 px-2 gap-1"
+            title="Insert Card"
+          >
+            <Square className="h-4 w-4" />
+            <Plus className="h-3 w-3" />
+          </Button>
+        </DialogTrigger>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Insert Card</DialogTitle>
+            <DialogDescription>
+              Choose a card type to insert into your template
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4 py-4">
+            <div className="space-y-2">
+              <label className="text-sm font-medium">Card Type</label>
+              <Select value={selectedCardType} onValueChange={setSelectedCardType}>
+                <SelectTrigger>
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  {cardTypes.map((type) => (
+                    <SelectItem key={type.value} value={type.value}>
+                      <div>
+                        <div className="font-medium">{type.label}</div>
+                        <div className="text-xs text-muted-foreground">{type.description}</div>
+                      </div>
+                    </SelectItem>
+                  ))}
+                </SelectContent>
+              </Select>
+            </div>
+            <Button onClick={handleInsertCard} className="w-full">
+              Insert Card
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
+
+      {/* Button Insert Dialog */}
+      <Dialog open={showButtonDialog} onOpenChange={setShowButtonDialog}>
+        <DialogTrigger asChild>
+          <Button
+            type="button"
+            variant="ghost"
+            size="sm"
+            className="h-8 px-2 gap-1"
+            title="Insert Button"
+          >
+            <MousePointer className="h-4 w-4" />
+            <Plus className="h-3 w-3" />
+          </Button>
+        </DialogTrigger>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Insert Button</DialogTitle>
+            <DialogDescription>
+              Choose a button style to insert
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4 py-4">
+            <div className="space-y-2">
+              <label className="text-sm font-medium">Button Style</label>
+              <Select value={buttonStyle} onValueChange={setButtonStyle}>
+                <SelectTrigger>
+                  <SelectValue />
+                </SelectTrigger>
+                <SelectContent>
+                  <SelectItem value="solid">
+                    <div>
+                      <div className="font-medium">Solid</div>
+                      <div className="text-xs text-muted-foreground">Filled background</div>
+                    </div>
+                  </SelectItem>
+                  <SelectItem value="outline">
+                    <div>
+                      <div className="font-medium">Outline</div>
+                      <div className="text-xs text-muted-foreground">Border only</div>
+                    </div>
+                  </SelectItem>
+                </SelectContent>
+              </Select>
+            </div>
+            <Button onClick={handleInsertButton} className="w-full">
+              Insert Button
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
+
+      {/* Image Insert Dialog */}
+      <Dialog open={showImageDialog} onOpenChange={setShowImageDialog}>
+        <DialogTrigger asChild>
+          <Button
+            type="button"
+            variant="ghost"
+            size="sm"
+            className="h-8 px-2 gap-1"
+            title="Insert Image"
+          >
+            <Image className="h-4 w-4" />
+            <Plus className="h-3 w-3" />
+          </Button>
+        </DialogTrigger>
+        <DialogContent>
+          <DialogHeader>
+            <DialogTitle>Insert Image</DialogTitle>
+            <DialogDescription>
+              Insert an image using standard Markdown syntax
+            </DialogDescription>
+          </DialogHeader>
+          <div className="space-y-4 py-4">
+            <div className="text-sm text-muted-foreground">
+              <p>Syntax: <code className="px-1 py-0.5 bg-muted rounded">![Alt text](image-url)</code></p>
+              <p className="mt-2">Example: <code className="px-1 py-0.5 bg-muted rounded">![Logo](https://example.com/logo.png)</code></p>
+            </div>
+            <Button onClick={handleInsertImage} className="w-full">
+              Insert Image Template
+            </Button>
+          </div>
+        </DialogContent>
+      </Dialog>
+
+      {/* Separator */}
+      <div className="w-px h-8 bg-border" />
+
+      {/* Other formatting tools */}
+      {tools.map((tool) => (
+        <Button
+          key={tool.label}
+          type="button"
+          variant="ghost"
+          size="sm"
+          onClick={() => onInsert(tool.before, tool.after)}
+          className="h-8 w-8 p-0"
+          title={tool.label}
+        >
+          <tool.icon className="h-4 w-4" />
+        </Button>
+      ))}
+      
+      <div className="flex-1" />
+      <div className="flex items-center gap-2 text-xs text-muted-foreground">
+        <span className="hidden sm:inline">Quick formatting:</span>
+        <code className="px-1 py-0.5 bg-muted rounded">**bold**</code>
+        <code className="px-1 py-0.5 bg-muted rounded">## heading</code>
+      </div>
+    </div>
+  );
+}