feat(controlled): 实现设备激活与安全认证流程

- 添加API客户端、加密存储和provision/token激活逻辑
- WebSocket改用Bearer令牌认证，移除REGISTER请求
- 设备ID改为服务端下发，支持令牌刷新和强制下线处理
- 新增deviceSecret加密存储和accessToken自动刷新
- 更新设备ID获取方式为出厂SN，添加安全存储依赖

webrtc_controller_ios/web_rtc_controller_ios/Views/SetupPanelView.swift

@@ -0,0 +1,67 @@
+import SwiftUI
+
+/// 设置面板：未连接时显示，用于查看本机设备 ID、配置信令服务器与连接目标。
+struct SetupPanelView: View {
+    @ObservedObject var viewModel: ControllerViewModel
+
+    var body: some View {
+        NavigationView {
+            Form {
+                Section("本机信息") {
+                    HStack {
+                        Text("本机设备 ID")
+                        Spacer()
+                        Text(viewModel.myDeviceId)
+                            .font(.system(.body, design: .monospaced))
+                            .foregroundColor(.secondary)
+                            .textSelection(.enabled)
+                    }
+                }
+
+                Section("连接设置") {
+                    TextField("信令服务器地址 (wss://...)", text: $viewModel.serverUrl)
+                        .keyboardType(.URL)
+                        .autocapitalization(.none)
+                        .disableAutocorrection(true)
+                    TextField("目标设备 ID", text: $viewModel.targetDeviceId)
+                        .autocapitalization(.allCharacters)
+                        .disableAutocorrection(true)
+                }
+
+                Section {
+                    Button {
+                        viewModel.requestConnect()
+                    } label: {
+                        HStack {
+                            Spacer()
+                            if viewModel.isConnecting {
+                                ProgressView()
+                                    .padding(.trailing, 8)
+                            }
+                            Text(viewModel.isConnecting ? "连接中..." : "连接")
+                                .font(.system(size: 15, weight: .semibold))
+                            Spacer()
+                        }
+                    }
+                    .disabled(viewModel.isConnecting)
+
+                    if viewModel.isConnecting {
+                        Button(role: .destructive) {
+                            viewModel.disconnect()
+                        } label: {
+                            HStack {
+                                Spacer()
+                                Text("取消")
+                                Spacer()
+                            }
+                        }
+                    }
+                } footer: {
+                    Text(viewModel.statusText)
+                }
+            }
+            .navigationTitle("WebRTC 控制端")
+        }
+        .navigationViewStyle(.stack)
+    }
+}