chore(ios): 添加LoginView并修复TokenStore类型与线程调度问题

- 在Xcode项目中添加LoginView.swift文件引用
- 修复TokenStore中Keychain查询字典类型为CFString
- 将DispatchQueue.main.async替换为MainActor.run，避免弱引用丢失
- 修复绑定设备信息时的线程安全与变量命名

webrtc_controller_ios/web_rtc_controller_ios/Utils/TokenStore.swift

@@ -42,7 +42,7 @@ enum TokenStore {
 
     static func clear() {
         for k in [accessKey, refreshKey, userKey] {
-            let query: [String: Any] = [
+            let query: [CFString: Any] = [
                 kSecClass: kSecClassGenericPassword,
                 kSecAttrService: service,
                 kSecAttrAccount: k
@@ -55,7 +55,7 @@ enum TokenStore {
 
     private static func save(key: String, value: String) {
         // 先删后存，避免重复条目。
-        let query: [String: Any] = [
+        let query: [CFString: Any] = [
             kSecClass: kSecClassGenericPassword,
             kSecAttrService: service,
             kSecAttrAccount: key,
@@ -66,7 +66,7 @@ enum TokenStore {
     }
 
     private static func load(key: String) -> String? {
-        let query: [String: Any] = [
+        let query: [CFString: Any] = [
             kSecClass: kSecClassGenericPassword,
             kSecAttrService: service,
             kSecAttrAccount: key,