fix(whatsapp): keep QR login state in sync

Keep WhatsApp QR login state synced across gateway, macOS, and UI wait flows.

- Preserve the latest QR data URL/version while login polling rotates codes.
- Keep the wait-result protocol bounded to current QR metadata.
- Stabilize QR rendering and media fixture coverage after rebasing on main.

Validation:
- pnpm test extensions/whatsapp/src/login-qr.test.ts extensions/whatsapp/src/media.test.ts extensions/whatsapp/src/agent-tools-login.test.ts src/gateway/protocol/channels.schema.test.ts src/gateway/server-methods/web.start.test.ts ui/src/ui/controllers/channels.test.ts
- pnpm test:extension whatsapp
- cd apps/macos && swift test --filter ChannelsSettingsSmokeTests
- GitHub PR checks: 62 success, 5 skipped

apps/shared/OpenClawKit/Sources/OpenClawProtocol/GatewayModels.swift

@@ -2610,18 +2610,22 @@ public struct WebLoginStartParams: Codable, Sendable {
 public struct WebLoginWaitParams: Codable, Sendable {
     public let timeoutms: Int?
     public let accountid: String?
+    public let currentqrdataurl: String?
 
     public init(
         timeoutms: Int?,
-        accountid: String?)
+        accountid: String?,
+        currentqrdataurl: String?)
     {
         self.timeoutms = timeoutms
         self.accountid = accountid
+        self.currentqrdataurl = currentqrdataurl
     }
 
     private enum CodingKeys: String, CodingKey {
         case timeoutms = "timeoutMs"
         case accountid = "accountId"
+        case currentqrdataurl = "currentQrDataUrl"
     }
 }