feat(chat): migrate chat protocol to lock detail

src/stores/chat/chat-state.ts

@@ -18,19 +18,15 @@ export interface ChatState {
    * - 非 VIP / 游客：固定 false，走 HTTP
    */
   wsConnected: boolean;
-  paywallTriggered: boolean;
-  paywallReason:
-    | "daily_limit"
-    | "total_limit"
-    | "photo_paywall"
-    | "private_paywall"
-    | null;
-  paywallDetail:
+  upgradePromptVisible: boolean;
+  upgradeReason: "daily_limit" | "private_message" | "image" | null;
+  upgradeHint: string | null;
+  upgradeDetail:
     | {
         type?: string;
         usedToday?: number;
         usedTotal?: number;
-        limit: number;
+        limit?: number;
       }
     | null;
   unlockingPrivateMessageId: string | null;
@@ -48,9 +44,10 @@ export const initialState: ChatState = {
   messages: [],
   isReplyingAI: false,
   wsConnected: false,
-  paywallTriggered: false,
-  paywallReason: null,
-  paywallDetail: null,
+  upgradePromptVisible: false,
+  upgradeReason: null,
+  upgradeHint: null,
+  upgradeDetail: null,
   unlockingPrivateMessageId: null,
   isLoadingMore: false,
   hasMore: true,