refactor(chat): remove private unlock machine flow

src/app/chat/components/chat-area.tsx

@@ -26,8 +26,7 @@ export interface ChatAreaProps {
   messages: readonly UiMessage[];
   isReplyingAI: boolean;
   isGuest: boolean;
-  unlockingPrivateMessageId?: string | null;
-  onUnlockPrivateMessage?: (messageId: string) => void;
+  onUnlockPrivateMessage?: () => void;
   onUnlockImagePaywall?: () => void;
   onUnlockVoiceMessage?: () => void;
 }
@@ -35,7 +34,6 @@ export interface ChatAreaProps {
 export function ChatArea({
   messages,
   isReplyingAI,
-  unlockingPrivateMessageId,
   onUnlockPrivateMessage,
   onUnlockImagePaywall,
   onUnlockVoiceMessage,
@@ -60,7 +58,6 @@ export function ChatArea({
 
       {renderMessagesWithDateHeaders(
         messages,
-        unlockingPrivateMessageId,
         onUnlockPrivateMessage,
         onUnlockImagePaywall,
         onUnlockVoiceMessage,
@@ -74,8 +71,7 @@ export function ChatArea({
 /** 渲染消息列表（按日期分组插入分隔条） */
 function renderMessagesWithDateHeaders(
   messages: readonly UiMessage[],
-  unlockingPrivateMessageId?: string | null,
-  onUnlockPrivateMessage?: (messageId: string) => void,
+  onUnlockPrivateMessage?: () => void,
   onUnlockImagePaywall?: () => void,
   onUnlockVoiceMessage?: () => void,
 ) {
@@ -94,7 +90,6 @@ function renderMessagesWithDateHeaders(
     ) : (
       <MessageBubble
         key={item.key}
-        id={item.message.id}
         content={item.message.content}
         imageUrl={item.message.imageUrl}
         imagePaywalled={item.message.imagePaywalled}
@@ -104,10 +99,6 @@ function renderMessagesWithDateHeaders(
         lockReason={item.message.lockReason}
         lockedPrivate={item.message.lockedPrivate}
         privateMessageHint={item.message.privateMessageHint}
-        isUnlockingPrivate={
-          item.message.id != null &&
-          item.message.id === unlockingPrivateMessageId
-        }
         onUnlockPrivateMessage={onUnlockPrivateMessage}
         onUnlockImagePaywall={onUnlockImagePaywall}
         onUnlockVoiceMessage={onUnlockVoiceMessage}