feat(ios): tab tabanlı navigasyon ve okuma durumu takibi ekle

ios/Bookibra/DesignSystem/Components/EmptyStateView.swift

@@ -0,0 +1,34 @@
+import SwiftUI
+
+struct EmptyStateView: View {
+    let symbol: String
+    let title: String
+    let message: String
+    let buttonTitle: String?
+    let action: (() -> Void)?
+
+    var body: some View {
+        VStack(spacing: Theme.Spacing.medium) {
+            Image(systemName: symbol)
+                .font(.system(size: 44, weight: .semibold))
+                .foregroundStyle(.secondary)
+
+            Text(title)
+                .font(.title3.weight(.semibold))
+
+            Text(message)
+                .font(.body)
+                .foregroundStyle(.secondary)
+                .multilineTextAlignment(.center)
+
+            if let buttonTitle, let action {
+                Button(buttonTitle, action: action)
+                    .buttonStyle(.borderedProminent)
+            }
+        }
+        .padding(24)
+        .frame(maxWidth: .infinity)
+        .background(.ultraThinMaterial, in: RoundedRectangle(cornerRadius: 20, style: .continuous))
+        .padding(.horizontal, 20)
+    }
+}