auto-claude: subtask-3-2 - Enhance metadata generation across all pages

Added missing OpenGraph and Twitter card metadata to about, contact, and portfolio pages:
- Added siteName to OpenGraph metadata
- Added OpenGraph images with proper dimensions (1200x630)
- Added Twitter card metadata (summary_large_image)

All pages now follow the home page metadata pattern for consistent SEO.

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

src/app/[locale]/about/page.tsx

@@ -74,9 +74,24 @@ export async function generateMetadata({ params }: Props): Promise<Metadata> {
       title: t('title'),
       description: t('description'),
       url: `${BASE_URL}${localePath}`,
+      siteName: 'Damjan Savić',
       type: 'profile',
       locale: locale === 'de' ? 'de_DE' : locale === 'sr' ? 'sr_RS' : 'en_US',
       alternateLocale: ['de_DE', 'en_US', 'sr_RS'].filter(l => l !== (locale === 'de' ? 'de_DE' : locale === 'sr' ? 'sr_RS' : 'en_US')),
+      images: [
+        {
+          url: `${BASE_URL}/images/og-image.jpg`,
+          width: 1200,
+          height: 630,
+          alt: 'Damjan Savić - AI & Automation Specialist',
+        },
+      ],
+    },
+    twitter: {
+      card: 'summary_large_image',
+      title: t('title'),
+      description: t('description'),
+      images: [`${BASE_URL}/images/og-image.jpg`],
     },
   };
 }

src/app/[locale]/contact/page.tsx

@@ -52,9 +52,24 @@ export async function generateMetadata({ params }: Props): Promise<Metadata> {
       title: titles[locale] || titles.de,
       description: descriptions[locale] || descriptions.de,
       url: `${BASE_URL}${localePath}`,
+      siteName: 'Damjan Savić',
       type: 'website',
       locale: locale === 'de' ? 'de_DE' : locale === 'sr' ? 'sr_RS' : 'en_US',
       alternateLocale: ['de_DE', 'en_US', 'sr_RS'].filter(l => l !== (locale === 'de' ? 'de_DE' : locale === 'sr' ? 'sr_RS' : 'en_US')),
+      images: [
+        {
+          url: `${BASE_URL}/images/og-image.jpg`,
+          width: 1200,
+          height: 630,
+          alt: 'Damjan Savić - AI & Automation Specialist',
+        },
+      ],
+    },
+    twitter: {
+      card: 'summary_large_image',
+      title: titles[locale] || titles.de,
+      description: descriptions[locale] || descriptions.de,
+      images: [`${BASE_URL}/images/og-image.jpg`],
     },
   };
 }

src/app/[locale]/portfolio/page.tsx

@@ -70,9 +70,24 @@ export async function generateMetadata({ params }: Props): Promise<Metadata> {
       title: t('title'),
       description: t('description'),
       url: `${BASE_URL}${localePath}`,
+      siteName: 'Damjan Savić',
       type: 'website',
       locale: locale === 'de' ? 'de_DE' : locale === 'sr' ? 'sr_RS' : 'en_US',
       alternateLocale: ['de_DE', 'en_US', 'sr_RS'].filter(l => l !== (locale === 'de' ? 'de_DE' : locale === 'sr' ? 'sr_RS' : 'en_US')),
+      images: [
+        {
+          url: `${BASE_URL}/images/og-image.jpg`,
+          width: 1200,
+          height: 630,
+          alt: 'Damjan Savić - AI & Automation Specialist',
+        },
+      ],
+    },
+    twitter: {
+      card: 'summary_large_image',
+      title: t('title'),
+      description: t('description'),
+      images: [`${BASE_URL}/images/og-image.jpg`],
     },
   };
 }