♻️ Refactor watchOS content view

ios/WatchRunner Watch App/Views/ActivityListView.swift

@@ -0,0 +1,63 @@
+//
+//  ActivityListView.swift
+//  WatchRunner Watch App
+//
+//  Created by LittleSheep on 2025/10/29.
+//
+
+import SwiftUI
+
+// MARK: - Views
+
+struct ActivityListView: View {
+    @StateObject private var viewModel: ActivityViewModel
+    @EnvironmentObject var appState: AppState
+
+    init(filter: String, mockActivities: [SnActivity]? = nil) {
+        _viewModel = StateObject(wrappedValue: ActivityViewModel(filter: filter, mockActivities: mockActivities))
+    }
+
+    var body: some View {
+        Group {
+            if viewModel.isLoading {
+                ProgressView()
+            } else if let errorMessage = viewModel.errorMessage {
+                VStack {
+                    Text("Error fetching data")
+                        .font(.headline)
+                    Text(errorMessage)
+                        .font(.caption)
+                        .lineLimit(nil)
+                }
+                .padding()
+            } else if viewModel.activities.isEmpty {
+                Text("No activities found.")
+            } else {
+                List(viewModel.activities) { activity in
+                    switch activity.type {
+                    case "posts.new", "posts.new.replies":
+                        if case .post(let post) = activity.data {
+                            NavigationLink(destination: PostDetailView(post: post)) {
+                                PostRowView(post: post)
+                            }
+                        }
+                    case "discovery":
+                         if case .discovery(let discoveryData) = activity.data {
+                             DiscoveryView(discoveryData: discoveryData)
+                         }
+                    default:
+                        Text("Unknown activity type: \(activity.type)")
+                    }
+                }
+            }
+        }
+        .task {
+            // Only fetch if appState is ready and token/serverUrl are available
+            if appState.isReady, let token = appState.token, let serverUrl = appState.serverUrl {
+                await viewModel.fetchActivities(token: token, serverUrl: serverUrl)
+            }
+        }
+        .navigationTitle(viewModel.filter)
+        .navigationBarTitleDisplayMode(.inline)
+    }
+}