feat: Add card insert buttons toolbar

## ✨ New Feature: Card Insert Buttons!

### What's Added:

**Card Insert Toolbar** above the rich text editor with 6 quick-insert buttons:

1. **Basic Card** - Plain card with default content
2. **Success Card** - Green checkmark, success message
3. **Info Card** - Blue info icon, informational content
4. **Warning Card** - Orange alert icon, warning message
5. **Hero Card** - Large text, background image support
6. **Button** - Call-to-action button with link

### Features:

**Visual Toolbar:**
```
Insert Card: [Basic] [✓ Success] [ℹ Info] [⚠ Warning] [🖼 Hero] | [+ Button]
```

**One-Click Insert:**
- Click button → Card inserted at end of content
- Pre-filled with sample content
- Proper [card] syntax
- Toast notification confirms insertion

**Smart Behavior:**
- Only shows in Visual Editor mode (hidden in Code Mode)
- Styled toolbar with icons and colors
- Responsive layout (wraps on mobile)
- Separator between cards and button

### Card Types:

**Basic:**
```html
[card]
<h2>Card Title</h2>
<p>Card content goes here...</p>
[/card]
```

**Success:**
```html
[card type="success"]
<h2>✅ Success!</h2>
<p>Your action was successful.</p>
[/card]
```

**Info, Warning, Hero** - Similar structure with different types

**Button:**
```html
<p style="text-align: center;">
  <a href="{order_url}" class="button">Button Text</a>
</p>
```

### Benefits:

- ✅ **No manual typing** of [card] tags
- ✅ **Consistent formatting** every time
- ✅ **Visual feedback** with toast notifications
- ✅ **Beginner-friendly** - just click and edit
- ✅ **Professional templates** with pre-filled content

### Next: Email Appearance Settings 🎨

admin-spa/src/routes/Settings/Notifications/EditTemplate.tsx

@@ -9,7 +9,7 @@ import { Input } from '@/components/ui/input';
 import { RichTextEditor } from '@/components/ui/rich-text-editor';
 import { Label } from '@/components/ui/label';
 import { Tabs, TabsContent, TabsList, TabsTrigger } from '@/components/ui/tabs';
-import { ArrowLeft, Eye, Edit, RotateCcw } from 'lucide-react';
+import { ArrowLeft, Eye, Edit, RotateCcw, Plus, CheckCircle, Info, AlertCircle, Image } from 'lucide-react';
 import { toast } from 'sonner';
 import { __ } from '@/lib/i18n';
 
@@ -125,6 +125,30 @@ export default function EditTemplate() {
     }
   };
 
+  // Insert card helpers
+  const insertCard = (type?: string, content?: string) => {
+    let cardText = '';
+    
+    if (type) {
+      cardText = `[card type="${type}"]
+${content || '<h2>Card Title</h2>\n<p>Card content goes here...</p>'}
+[/card]\n\n`;
+    } else {
+      cardText = `[card]
+${content || '<h2>Card Title</h2>\n<p>Card content goes here...</p>'}
+[/card]\n\n`;
+    }
+    
+    setBody(body + cardText);
+    toast.success(__('Card inserted'));
+  };
+
+  const insertButton = () => {
+    const buttonHtml = `<p style="text-align: center;"><a href="{order_url}" class="button">Button Text</a></p>`;
+    setBody(body + buttonHtml + '\n');
+    toast.success(__('Button inserted'));
+  };
+
   // Get variable keys for the rich text editor
   const variableKeys = Object.keys(variables);
   
@@ -343,6 +367,76 @@ export default function EditTemplate() {
                 </Button>
               </div>
               
+              {/* Card Insert Buttons */}
+              {!codeMode && (
+                <div className="flex flex-wrap gap-2 p-3 bg-muted/50 rounded-md border">
+                  <span className="text-xs font-medium text-muted-foreground flex items-center">
+                    {__('Insert Card:')}
+                  </span>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={() => insertCard()}
+                    className="h-7 text-xs gap-1"
+                  >
+                    <Plus className="h-3 w-3" />
+                    {__('Basic')}
+                  </Button>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={() => insertCard('success', '<h2>✅ Success!</h2>\n<p>Your action was successful.</p>')}
+                    className="h-7 text-xs gap-1"
+                  >
+                    <CheckCircle className="h-3 w-3 text-green-600" />
+                    {__('Success')}
+                  </Button>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={() => insertCard('info', '<h2>ℹ️ Information</h2>\n<p>Important information here.</p>')}
+                    className="h-7 text-xs gap-1"
+                  >
+                    <Info className="h-3 w-3 text-blue-600" />
+                    {__('Info')}
+                  </Button>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={() => insertCard('warning', '<h2>⚠️ Warning</h2>\n<p>Please pay attention to this.</p>')}
+                    className="h-7 text-xs gap-1"
+                  >
+                    <AlertCircle className="h-3 w-3 text-orange-600" />
+                    {__('Warning')}
+                  </Button>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={() => insertCard('hero', '<h1>Big Announcement</h1>\n<p>Hero card with large text.</p>', 'https://example.com/bg.jpg')}
+                    className="h-7 text-xs gap-1"
+                  >
+                    <Image className="h-3 w-3 text-purple-600" />
+                    {__('Hero')}
+                  </Button>
+                  <div className="border-l mx-1"></div>
+                  <Button
+                    type="button"
+                    variant="outline"
+                    size="sm"
+                    onClick={insertButton}
+                    className="h-7 text-xs gap-1"
+                  >
+                    <Plus className="h-3 w-3" />
+                    {__('Button')}
+                  </Button>
+                </div>
+              )}
+              
               {codeMode ? (
                 <textarea
                   value={body}