simplify ui for incremental features

frontend/MusicApp/ViewModels/AppState.swift

@@ -9,17 +9,8 @@ enum AppScreen {
     case main
 }
 
-enum ActiveTab: String, CaseIterable {
-    case pulse = "pulse"
-    case charts = "charts"
-    case profile = "profile"
-    case social = "social"
-    case notifications = "notifications"
-}
-
 class AppState: ObservableObject {
     @Published var currentScreen: AppScreen = .splash
-    @Published var activeTab: ActiveTab = .pulse
     @Published var hasCompletedOnboarding: Bool = false
     @Published var isAuthenticated: Bool = false
     @Published var currentUser: User?
@@ -91,11 +82,6 @@ class AppState: ObservableObject {
         KeychainHelper.clearAll()
         currentScreen = .authentication
     }
-
-    @MainActor
-    func setActiveTab(_ tab: ActiveTab) {
-        activeTab = tab
-    }
 }
 
 extension AppState {

frontend/MusicApp/ViewModels/HomeFeedViewModel.swift

@@ -2,24 +2,9 @@ import Foundation
 import Combine
 import SwiftUI
 
-enum FeedFilter: String, CaseIterable {
-    case trending = "trending"
-    case forYou = "forYou"
-    case following = "following"
-
-    var displayName: String {
-        switch self {
-        case .trending: return "Trending"
-        case .forYou: return "For You"
-        case .following: return "Following"
-        }
-    }
-}
-
 @MainActor
 class HomeFeedViewModel: ObservableObject {
     @Published var feedItems: [MusicItem] = []
-    @Published var activeFilter: FeedFilter = .trending
     @Published var isLoading: Bool = false
     @Published var errorMessage: String?
     @Published var selectedItem: MusicItem?
@@ -36,21 +21,14 @@ class HomeFeedViewModel: ObservableObject {
         errorMessage = nil
 
         do {
-            feedItems = try await musicService.getFeed(filter: activeFilter.rawValue)
+            feedItems = try await musicService.getFeed(filter: "forYou")
         } catch {
             errorMessage = error.localizedDescription
         }
 
         isLoading = false
     }
 
-    func setFilter(_ filter: FeedFilter) {
-        activeFilter = filter
-        Task {
-            await loadFeed()
-        }
-    }
-
     func selectItemForRating(_ item: MusicItem) {
         selectedItem = item
         showRatingModal = true