demo app + SDK updates:\n- Add direct ANI transfer (prepare -> transfer)\n- Add firmware update flow (fetch latest w/ x-api-key, OTA transfer)\n- Extract x-api-key to NetworkConstants\n- Rename example app to demo; move folder and entry to DemoApp\n- Switch from SPM package dependency to local framework target\n- Enable automatic Info.plist generation for framework target\n- Add placeholder test to satisfy SwiftPM test target\n- Regenerate XcodeGen project (demo.xcodeproj)

Sources/DuooomiBleSDK/Models/VersionInfo.swift

@@ -0,0 +1,27 @@
+import Foundation
+
+public struct VersionInfo: Sendable, Equatable {
+    public let version: String
+    /// 命令类型标识，设备可能返回 Int (如 7) 或 String (如 "0x07")
+    public let type: String
+}
+
+extension VersionInfo: Codable {
+    enum CodingKeys: String, CodingKey {
+        case version, type
+    }
+
+    public init(from decoder: Decoder) throws {
+        let container = try decoder.container(keyedBy: CodingKeys.self)
+        version = try container.decode(String.self, forKey: .version)
+
+        // type may come as Int or String from different firmware versions
+        if let str = try? container.decode(String.self, forKey: .type) {
+            type = str
+        } else if let num = try? container.decode(Int.self, forKey: .type) {
+            type = "\(num)"
+        } else {
+            type = ""
+        }
+    }
+}