feat: add social media fields to cms, improve gallery video thumbnails and add navigation buttons

src/app/dashboard/cms/content/page.tsx

@@ -10,9 +10,23 @@ export default async function ContentPage() {
         .select('*')
         .order('key')
 
-    // CMS migration script creates default keys.
-    // If table is empty, we might want to seed it or just show empty.
-    // Assuming migration ran, we have data.
+    // Define default contents that should exist
+    const DEFAULT_CONTENTS: SiteContent[] = [
+        { key: 'social_instagram', value: '', type: 'text', section: 'contact' },
+        { key: 'social_facebook', value: '', type: 'text', section: 'contact' },
+        { key: 'social_twitter', value: '', type: 'text', section: 'contact' },
+        { key: 'contact_map_embed', value: '', type: 'html', section: 'contact' },
+    ]
+
+    // Merge default contents with existing contents
+    const mergedContents = [...(contents as SiteContent[] || [])]
+    const existingKeys = new Set(mergedContents.map(c => c.key))
+
+    DEFAULT_CONTENTS.forEach(item => {
+        if (!existingKeys.has(item.key)) {
+            mergedContents.push(item)
+        }
+    })
 
     return (
         <div className="space-y-6">
@@ -22,7 +36,7 @@ export default async function ContentPage() {
                     Site başlığı, sloganlar, iletişim bilgileri ve logoları buradan yönetebilirsiniz.
                 </p>
             </div>
-            <ContentForm initialContent={(contents as SiteContent[]) || []} />
+            <ContentForm initialContent={mergedContents} />
         </div>
     )
 }

src/app/dashboard/layout.tsx

@@ -3,6 +3,7 @@ import { UserNav } from "@/components/user-nav"
 import { Building } from "lucide-react"
 import { MobileSidebar } from "@/components/mobile-sidebar"
 import { createClient } from "@/lib/supabase/server"
+import { NavigationButtons } from "@/components/navigation-buttons"
 
 export default async function DashboardLayout({
     children,
@@ -28,6 +29,7 @@ export default async function DashboardLayout({
             <div className="flex-1 md:ml-72 flex flex-col min-h-screen">
                 {/* Header */}
                 <header className="sticky top-0 z-40 h-16 glass border-b px-4 md:px-6 flex items-center justify-between">
+                    <div className="flex items-center gap-4">
                         <div className="flex items-center gap-2 md:hidden">
                             <MobileSidebar user={userData} />
                             <div className="flex items-center font-bold text-lg">
@@ -35,6 +37,8 @@ export default async function DashboardLayout({
                                 WeddingOS
                             </div>
                         </div>
+                        <NavigationButtons />
+                    </div>
 
                     <div className="ml-auto flex items-center space-x-4">
                         <UserNav />

src/components/navigation-buttons.tsx

@@ -0,0 +1,32 @@
+"use client"
+
+import { Button } from "@/components/ui/button"
+import { ChevronLeft, ChevronRight } from "lucide-react"
+import { useRouter } from "next/navigation"
+
+export function NavigationButtons() {
+    const router = useRouter()
+
+    return (
+        <div className="flex items-center gap-1 h-8">
+            <Button
+                variant="ghost"
+                size="icon"
+                className="h-8 w-8 text-muted-foreground hover:text-primary"
+                onClick={() => router.back()}
+                title="Geri"
+            >
+                <ChevronLeft className="h-5 w-5" />
+            </Button>
+            <Button
+                variant="ghost"
+                size="icon"
+                className="h-8 w-8 text-muted-foreground hover:text-primary"
+                onClick={() => router.forward()}
+                title="İleri"
+            >
+                <ChevronRight className="h-5 w-5" />
+            </Button>
+        </div>
+    )
+}

src/components/public/gallery-grid.tsx

@@ -51,7 +51,7 @@ export function GalleryGrid({ items }: GalleryGridProps) {
                                 }
                             }}
                         >
-                            {displayImage && (
+                            {displayImage ? (
                                 <Image
                                     src={displayImage}
                                     alt={item.caption || 'Gallery Image'}
@@ -59,6 +59,10 @@ export function GalleryGrid({ items }: GalleryGridProps) {
                                     className="object-cover transition-transform duration-700 group-hover:scale-110"
                                     sizes="(max-width: 768px) 50vw, 25vw"
                                 />
+                            ) : (
+                                <div className="w-full h-full bg-slate-800 flex items-center justify-center bg-gradient-to-br from-slate-800 to-slate-900 group-hover:from-slate-700 group-hover:to-slate-800 transition-colors">
+                                    {/* Fallback for video without generic thumbnail */}
+                                </div>
                             )}
                             <div className="absolute inset-0 bg-black/40 opacity-0 group-hover:opacity-100 transition-opacity duration-300 flex flex-col items-center justify-center space-y-2">
                                 {item.video_url && (