feat(chat): add promotional external entry flow

src/stores/chat/chat-events.ts

@@ -16,6 +16,8 @@
  * chat-screen 不直接读 AuthStorage（除 token 取值）。
  */
 import type { PendingChatUnlockKind } from "@/lib/navigation/chat_unlock_session";
+import type { ChatLockType } from "@/data/schemas/chat";
+import type { PendingChatPromotion } from "@/data/storage/navigation";
 
 export type ChatEvent =
   // 鉴权生命周期（登录态变化后由 ChatAuthSync 派）
@@ -35,10 +37,19 @@ export type ChatEvent =
   | { type: "ChatSendMessage"; content: string }
   | { type: "ChatSendImage"; imageBase64: string }
   | { type: "ChatLoadMoreHistory" }
+  | {
+      type: "ChatPromotionInjected";
+      promotion: PendingChatPromotion;
+      messageId?: string;
+    }
+  | { type: "ChatPromotionCleared" }
   | {
       type: "ChatUnlockMessageRequested";
       messageId: string;
+      remoteMessageId?: string;
       kind: PendingChatUnlockKind;
+      lockType?: ChatLockType;
+      clientLockId?: string;
     }
   | { type: "ChatUnlockPaywallNavigationConsumed" }
   | { type: "ChatPaymentSucceeded" }