fix(iOS): SMB URL detection — show alert guiding to Files app instead of trying to play. Add import UIKit.

Sources/NetworkFileBrowser.swift

@@ -2,6 +2,8 @@ import SwiftUI
 import AVFoundation
 #if os(macOS)
 import AppKit
+#else
+import UIKit
 #endif
 
 // MARK: - 网络共享文件项
@@ -257,6 +259,20 @@ struct NetworkFileBrowserIOS: View {
     
     @State private var manualURL = ""
     @State private var showFileImporter = false
+    @State private var showSMBAlert = false
+    @State private var smbAlertURL = ""
+    
+    private func openInFiles(url: URL) {
+        smbAlertURL = url.absoluteString
+        showSMBAlert = true
+    }
+    
+    private func openFilesApp() {
+        // 打开 Files 应用
+        if let filesURL = URL(string: "shareddocuments://") {
+            UIApplication.shared.open(filesURL)
+        }
+    }
     
     var body: some View {
         NavigationView {
@@ -295,15 +311,22 @@ struct NetworkFileBrowserIOS: View {
                         .font(.headline)
                     
                     HStack {
-                        TextField("https://...  or  smb://...", text: $manualURL)
+                        TextField("https://...  播放流地址", text: $manualURL)
                             .textFieldStyle(.roundedBorder)
                             .keyboardType(.URL)
                             .autocapitalization(.none)
                             .disableAutocorrection(true)
                         
                         Button("Open") {
-                            guard let url = URL(string: manualURL.trimmingCharacters(in: .whitespaces)),
-                                  !manualURL.trimmingCharacters(in: .whitespaces).isEmpty else { return }
+                            let trimmed = manualURL.trimmingCharacters(in: .whitespaces)
+                            guard !trimmed.isEmpty, let url = URL(string: trimmed) else { return }
+                            
+                            // SMB/NFS 地址不能直接播放，引导去 Files 连接
+                            if url.scheme == "smb" || url.scheme == "nfs" {
+                                openInFiles(url: url)
+                                return
+                            }
+                            
                             let name = url.lastPathComponent.isEmpty ? (url.host ?? "Stream") : url.lastPathComponent
                             bridge.addURL(manualURL)
                             isPresented = false
@@ -327,6 +350,12 @@ struct NetworkFileBrowserIOS: View {
                     Button("Close") { isPresented = false }
                 }
             }
+            .alert("SMB/NFS Share", isPresented: $showSMBAlert) {
+                Button("Open Files App") { openFilesApp() }
+                Button("Cancel", role: .cancel) {}
+            } message: {
+                Text("To access SMB/NFS shares on iPhone:\n\n1. Open the Files app\n2. Tap ⋯ → Connect to Server\n3. Enter: \(smbAlertURL)\n4. Login with your credentials\n\nThen come back and use 'Browse Files'.")
+            }
             .fileImporter(
                 isPresented: $showFileImporter,
                 allowedContentTypes: [.movie, .video, .audio, .mpeg4Movie, .quickTimeMovie, .mp3, .wav, .mpeg4Audio],