feat: Enhanced Email Customization - Logo, Social, Hero Text! 🎨

## Frontend Improvements (1-3, 5)

### 1. Logo URL with WP Media Library ✅
- Added "Select" button next to logo URL input
- Opens WordPress Media Library
- Logo preview below input
- Easier for users to select from existing media

### 2. Footer Text with {current_year} Variable ✅
- Updated placeholder to show {current_year} usage
- Help text explains dynamic year variable
- Backend will replace with actual year

### 3. Social Links in Footer ✅
**Platforms Supported:**
- Facebook
- Twitter
- Instagram
- LinkedIn
- YouTube
- Website

**Features:**
- Add/remove social links
- Platform dropdown with icons
- URL input for each link
- Visual icons in UI
- Will render as icons in email footer

### 5. Hero Card Text Color ✅
- Added hero_text_color field
- Color picker + hex input
- Applied to preview
- Separate control for heading/text color
- Usually white for dark gradients

**Updated Interface:**
```typescript
interface EmailSettings {
  // ... existing
  hero_text_color: string;
  social_links: SocialLink[];
}

interface SocialLink {
  platform: string;
  url: string;
}
```

**File:**
- `routes/Settings/Notifications/EmailCustomization.tsx`

Next: Wire to backend (task 4)!

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

@@ -8,18 +8,27 @@ import { Button } from '@/components/ui/button';
 import { Input } from '@/components/ui/input';
 import { Label } from '@/components/ui/label';
 import { __ } from '@/lib/i18n';
-import { ArrowLeft, RefreshCw } from 'lucide-react';
+import { ArrowLeft, RefreshCw, Upload, Plus, Trash2, Facebook, Twitter, Instagram, Linkedin, Youtube, Globe } from 'lucide-react';
 import { toast } from 'sonner';
+import { openWPMediaLogo } from '@/lib/wp-media';
+import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from '@/components/ui/select';
+
+interface SocialLink {
+  platform: string;
+  url: string;
+}
 
 interface EmailSettings {
   primary_color: string;
   secondary_color: string;
   hero_gradient_start: string;
   hero_gradient_end: string;
+  hero_text_color: string;
   button_text_color: string;
   logo_url: string;
   header_text: string;
   footer_text: string;
+  social_links: SocialLink[];
 }
 
 export default function EmailCustomization() {
@@ -35,10 +44,12 @@ export default function EmailCustomization() {
       secondary_color: '#7f54b3',
       hero_gradient_start: '#667eea',
       hero_gradient_end: '#764ba2',
+      hero_text_color: '#ffffff',
       button_text_color: '#ffffff',
       logo_url: '',
       header_text: '',
       footer_text: '',
+      social_links: [],
     },
   });
 
@@ -47,10 +58,12 @@ export default function EmailCustomization() {
     secondary_color: '#7f54b3',
     hero_gradient_start: '#667eea',
     hero_gradient_end: '#764ba2',
+    hero_text_color: '#ffffff',
     button_text_color: '#ffffff',
     logo_url: '',
     header_text: '',
     footer_text: '',
+    social_links: [],
   });
 
   // Update form when settings load
@@ -104,6 +117,50 @@ export default function EmailCustomization() {
     setFormData(prev => ({ ...prev, [field]: value }));
   };
 
+  const handleLogoSelect = () => {
+    openWPMediaLogo((media) => {
+      if (media && media.url) {
+        handleChange('logo_url', media.url);
+      }
+    });
+  };
+
+  const addSocialLink = () => {
+    setFormData(prev => ({
+      ...prev,
+      social_links: [...prev.social_links, { platform: 'facebook', url: '' }],
+    }));
+  };
+
+  const removeSocialLink = (index: number) => {
+    setFormData(prev => ({
+      ...prev,
+      social_links: prev.social_links.filter((_, i) => i !== index),
+    }));
+  };
+
+  const updateSocialLink = (index: number, field: 'platform' | 'url', value: string) => {
+    setFormData(prev => ({
+      ...prev,
+      social_links: prev.social_links.map((link, i) =>
+        i === index ? { ...link, [field]: value } : link
+      ),
+    }));
+  };
+
+  const getSocialIcon = (platform: string) => {
+    const icons: Record<string, any> = {
+      facebook: Facebook,
+      twitter: Twitter,
+      instagram: Instagram,
+      linkedin: Linkedin,
+      youtube: Youtube,
+      website: Globe,
+    };
+    const Icon = icons[platform] || Globe;
+    return <Icon className="h-4 w-4" />;
+  };
+
   if (isLoading) {
     return (
       <SettingsLayout
@@ -252,9 +309,33 @@ export default function EmailCustomization() {
             </div>
           </div>
 
+          <div className="space-y-2">
+            <Label htmlFor="hero_text_color">{__('Text Color')}</Label>
+            <div className="flex gap-2">
+              <Input
+                id="hero_text_color"
+                type="color"
+                value={formData.hero_text_color}
+                onChange={(e) => handleChange('hero_text_color', e.target.value)}
+                className="w-20 h-10 p-1 cursor-pointer"
+              />
+              <Input
+                type="text"
+                value={formData.hero_text_color}
+                onChange={(e) => handleChange('hero_text_color', e.target.value)}
+                placeholder="#ffffff"
+                className="flex-1"
+              />
+            </div>
+            <p className="text-xs text-muted-foreground">
+              {__('Text and heading color for hero cards (usually white)')}
+            </p>
+          </div>
+
           {/* Preview */}
-          <div className="mt-4 p-6 rounded-lg text-white text-center" style={{
+          <div className="mt-4 p-6 rounded-lg text-center" style={{
-            background: `linear-gradient(135deg, ${formData.hero_gradient_start} 0%, ${formData.hero_gradient_end} 100%)`
+            background: `linear-gradient(135deg, ${formData.hero_gradient_start} 0%, ${formData.hero_gradient_end} 100%)`,
+            color: formData.hero_text_color
           }}>
             <h3 className="text-xl font-bold mb-2">{__('Preview')}</h3>
             <p className="text-sm opacity-90">{__('This is how your hero cards will look')}</p>
@@ -323,16 +404,37 @@ export default function EmailCustomization() {
           <div className="space-y-4">
             <div className="space-y-2">
               <Label htmlFor="logo_url">{__('Logo URL')}</Label>
+              <div className="flex gap-2">
                 <Input
                   id="logo_url"
                   type="url"
                   value={formData.logo_url}
                   onChange={(e) => handleChange('logo_url', e.target.value)}
                   placeholder="https://example.com/logo.png"
+                  className="flex-1"
                 />
+                <Button
+                  type="button"
+                  variant="outline"
+                  onClick={handleLogoSelect}
+                  className="gap-2"
+                >
+                  <Upload className="h-4 w-4" />
+                  {__('Select')}
+                </Button>
+              </div>
               <p className="text-xs text-muted-foreground">
                 {__('Full URL to your logo image (recommended: 200x60px)')}
               </p>
+              {formData.logo_url && (
+                <div className="mt-2 p-4 border rounded-lg bg-muted/30">
+                  <img
+                    src={formData.logo_url}
+                    alt="Logo preview"
+                    className="max-h-16 object-contain"
+                  />
+                </div>
+              )}
             </div>
 
             <div className="space-y-2">
@@ -356,10 +458,112 @@ export default function EmailCustomization() {
                 type="text"
                 value={formData.footer_text}
                 onChange={(e) => handleChange('footer_text', e.target.value)}
-                placeholder={__('© 2024 Your Store. All rights reserved.')}
+                placeholder={__('© {current_year} Your Store. All rights reserved.')}
               />
               <p className="text-xs text-muted-foreground">
-                {__('Text shown in email footer (copyright, address, etc.)')}
+                {__('Text shown in email footer. Use {current_year} for dynamic year.')}
+              </p>
+            </div>
+
+            {/* Social Links */}
+            <div className="space-y-3">
+              <div className="flex items-center justify-between">
+                <Label>{__('Social Links')}</Label>
+                <Button
+                  type="button"
+                  variant="outline"
+                  size="sm"
+                  onClick={addSocialLink}
+                  className="gap-2"
+                >
+                  <Plus className="h-4 w-4" />
+                  {__('Add Social Link')}
+                </Button>
+              </div>
+              
+              {formData.social_links.length === 0 ? (
+                <p className="text-sm text-muted-foreground">
+                  {__('No social links added. Click "Add Social Link" to get started.')}
+                </p>
+              ) : (
+                <div className="space-y-2">
+                  {formData.social_links.map((link, index) => (
+                    <div key={index} className="flex gap-2 items-start p-3 border rounded-lg">
+                      <div className="flex-1 grid grid-cols-2 gap-2">
+                        <div>
+                          <Select
+                            value={link.platform}
+                            onValueChange={(value) => updateSocialLink(index, 'platform', value)}
+                          >
+                            <SelectTrigger className="h-9">
+                              <div className="flex items-center gap-2">
+                                {getSocialIcon(link.platform)}
+                                <SelectValue />
+                              </div>
+                            </SelectTrigger>
+                            <SelectContent>
+                              <SelectItem value="facebook">
+                                <div className="flex items-center gap-2">
+                                  <Facebook className="h-4 w-4" />
+                                  Facebook
+                                </div>
+                              </SelectItem>
+                              <SelectItem value="twitter">
+                                <div className="flex items-center gap-2">
+                                  <Twitter className="h-4 w-4" />
+                                  Twitter
+                                </div>
+                              </SelectItem>
+                              <SelectItem value="instagram">
+                                <div className="flex items-center gap-2">
+                                  <Instagram className="h-4 w-4" />
+                                  Instagram
+                                </div>
+                              </SelectItem>
+                              <SelectItem value="linkedin">
+                                <div className="flex items-center gap-2">
+                                  <Linkedin className="h-4 w-4" />
+                                  LinkedIn
+                                </div>
+                              </SelectItem>
+                              <SelectItem value="youtube">
+                                <div className="flex items-center gap-2">
+                                  <Youtube className="h-4 w-4" />
+                                  YouTube
+                                </div>
+                              </SelectItem>
+                              <SelectItem value="website">
+                                <div className="flex items-center gap-2">
+                                  <Globe className="h-4 w-4" />
+                                  Website
+                                </div>
+                              </SelectItem>
+                            </SelectContent>
+                          </Select>
+                        </div>
+                        <Input
+                          type="url"
+                          value={link.url}
+                          onChange={(e) => updateSocialLink(index, 'url', e.target.value)}
+                          placeholder="https://..."
+                          className="h-9"
+                        />
+                      </div>
+                      <Button
+                        type="button"
+                        variant="ghost"
+                        size="sm"
+                        onClick={() => removeSocialLink(index)}
+                        className="h-9 w-9 p-0 text-destructive hover:text-destructive"
+                      >
+                        <Trash2 className="h-4 w-4" />
+                      </Button>
+                    </div>
+                  ))}
+                </div>
+              )}
+              <p className="text-xs text-muted-foreground">
+                {__('Social links will appear as icons in the email footer')}
               </p>
             </div>
           </div>