Yattee v2 rewrite

Yattee/Models/Navigation/AppTab.swift

@@ -0,0 +1,53 @@
+//
+//  AppTab.swift
+//  Yattee
+//
+//  Main app tab definitions.
+//
+
+import Foundation
+
+enum AppTab: String, CaseIterable, Identifiable {
+    case home
+    case subscriptions
+    case search
+    #if os(tvOS)
+    case settings
+    #endif
+
+    var id: String { rawValue }
+
+    var title: String {
+        switch self {
+        case .home: return String(localized: "tabs.home")
+        case .subscriptions: return String(localized: "tabs.subscriptions")
+        case .search: return String(localized: "tabs.search")
+        #if os(tvOS)
+        case .settings: return String(localized: "tabs.settings")
+        #endif
+        }
+    }
+
+    var systemImage: String {
+        switch self {
+        case .home: return "house.fill"
+        case .subscriptions: return "play.square.stack.fill"
+        case .search: return "magnifyingglass"
+        #if os(tvOS)
+        case .settings: return "gearshape"
+        #endif
+        }
+    }
+
+    /// SidebarItem equivalent for UnifiedTabView navigation.
+    var sidebarItem: SidebarItem {
+        switch self {
+        case .home: return .home
+        case .subscriptions: return .subscriptionsFeed
+        case .search: return .search
+        #if os(tvOS)
+        case .settings: return .settings
+        #endif
+        }
+    }
+}