diff --git a/src/stores/chat/__tests__/chat-machine.helpers.test.ts b/src/stores/chat/__tests__/chat-machine.helpers.test.ts
index b9297a0f..97e308f2 100644
--- a/src/stores/chat/__tests__/chat-machine.helpers.test.ts
+++ b/src/stores/chat/__tests__/chat-machine.helpers.test.ts
@@ -38,8 +38,6 @@ function makeChatState(overrides: Partial<ChatState> = {}): ChatState {
     pendingReplyCount: 1,
     upgradePromptVisible: false,
     upgradeReason: null,
-    upgradeHint: null,
-    upgradeDetail: null,
     isLoadingMore: false,
     hasMore: true,
     historyOffset: 0,
@@ -169,12 +167,6 @@ describe("applyHttpSendOutput", () => {
     expect(nextState.isReplyingAI).toBe(false);
     expect(nextState.upgradePromptVisible).toBe(true);
     expect(nextState.upgradeReason).toBe("daily_limit");
-    expect(nextState.upgradeHint).toBeNull();
-    expect(nextState.upgradeDetail).toEqual({
-      type: "daily_msg_limit",
-      usedToday: 3,
-      limit: 3,
-    });
   });
 });
 
diff --git a/src/stores/chat/__tests__/chat-machine.transitions.test.ts b/src/stores/chat/__tests__/chat-machine.transitions.test.ts
index f60ed230..4bcabbcf 100644
--- a/src/stores/chat/__tests__/chat-machine.transitions.test.ts
+++ b/src/stores/chat/__tests__/chat-machine.transitions.test.ts
@@ -479,8 +479,6 @@ describe("chatMachine transitions", () => {
 
     expect(actor.getSnapshot().context.upgradePromptVisible).toBe(false);
     expect(actor.getSnapshot().context.upgradeReason).toBeNull();
-    expect(actor.getSnapshot().context.upgradeHint).toBeNull();
-    expect(actor.getSnapshot().context.upgradeDetail).toBeNull();
 
     actor.stop();
   });
diff --git a/src/stores/chat/chat-context.tsx b/src/stores/chat/chat-context.tsx
index 759ddfc7..a6c28024 100644
--- a/src/stores/chat/chat-context.tsx
+++ b/src/stores/chat/chat-context.tsx
@@ -23,8 +23,6 @@ interface ChatState {
   isReplyingAI: boolean;
   upgradePromptVisible: boolean;
   upgradeReason: MachineContext["upgradeReason"];
-  upgradeHint: MachineContext["upgradeHint"];
-  upgradeDetail: MachineContext["upgradeDetail"];
   isLoadingMore: boolean;
   hasMore: boolean;
   historyOffset: number;
@@ -53,8 +51,6 @@ export function ChatProvider({ children }: ChatProviderProps) {
       isReplyingAI: state.context.isReplyingAI,
       upgradePromptVisible: state.context.upgradePromptVisible,
       upgradeReason: state.context.upgradeReason,
-      upgradeHint: state.context.upgradeHint,
-      upgradeDetail: state.context.upgradeDetail,
       isLoadingMore: state.context.isLoadingMore,
       hasMore: state.context.hasMore,
       historyOffset: state.context.historyOffset,
diff --git a/src/stores/chat/chat-machine.helpers.ts b/src/stores/chat/chat-machine.helpers.ts
index 0c733099..ccba777b 100644
--- a/src/stores/chat/chat-machine.helpers.ts
+++ b/src/stores/chat/chat-machine.helpers.ts
@@ -194,8 +194,6 @@ export function applyHttpSendOutput(
       ...finishPendingReply(context),
       upgradePromptVisible: true,
       upgradeReason: "daily_limit",
-      upgradeHint: null,
-      upgradeDetail: normalizeLockDetail(lockDetail.detail),
     };
   }
 
@@ -211,8 +209,6 @@ export function applyHttpSendOutput(
       ...finishPendingReply(context),
       upgradePromptVisible: false,
       upgradeReason: null,
-      upgradeHint: null,
-      upgradeDetail: null,
     };
   }
 
@@ -221,8 +217,6 @@ export function applyHttpSendOutput(
     ...finishPendingReply(context),
     upgradePromptVisible: false,
     upgradeReason: null,
-    upgradeHint: null,
-    upgradeDetail: null,
   };
 }
 
@@ -252,22 +246,6 @@ export function shouldPromptUnlockHistory(messages: readonly UiMessage[]): boole
   return countLockedHistoryMessages(messages) > 1;
 }
 
-export function normalizeLockDetail(
-  detail: Record<string, unknown> | null,
-): ChatState["upgradeDetail"] {
-  if (!detail) return null;
-  return {
-    ...(typeof detail.type === "string" ? { type: detail.type } : {}),
-    ...(typeof detail.usedToday === "number"
-      ? { usedToday: detail.usedToday }
-      : {}),
-    ...(typeof detail.usedTotal === "number"
-      ? { usedTotal: detail.usedTotal }
-      : {}),
-    ...(typeof detail.limit === "number" ? { limit: detail.limit } : {}),
-  };
-}
-
 // ============================================================
 // Init 任务 2：history 3 步流（local → network → save）—— `loadHistoryActor` 调
 // ============================================================
diff --git a/src/stores/chat/chat-machine.ts b/src/stores/chat/chat-machine.ts
index 09946577..d9acd6c4 100644
--- a/src/stores/chat/chat-machine.ts
+++ b/src/stores/chat/chat-machine.ts
@@ -109,8 +109,6 @@ export const chatMachine = setup({
         ],
         upgradePromptVisible: false,
         upgradeReason: null,
-        upgradeHint: null,
-        upgradeDetail: null,
       };
     }),
 
@@ -135,8 +133,6 @@ export const chatMachine = setup({
         ],
         upgradePromptVisible: false,
         upgradeReason: null,
-        upgradeHint: null,
-        upgradeDetail: null,
       };
     }),
 
@@ -161,8 +157,6 @@ export const chatMachine = setup({
         ...beginPendingReply(context),
         upgradePromptVisible: false,
         upgradeReason: null,
-        upgradeHint: null,
-        upgradeDetail: null,
       };
     }),
 
@@ -187,8 +181,6 @@ export const chatMachine = setup({
         ...beginPendingReply(context),
         upgradePromptVisible: false,
         upgradeReason: null,
-        upgradeHint: null,
-        upgradeDetail: null,
       };
     }),
 
@@ -214,8 +206,6 @@ export const chatMachine = setup({
     clearUpgradePrompt: assign(() => ({
       upgradePromptVisible: false,
       upgradeReason: null,
-      upgradeHint: null,
-      upgradeDetail: null,
     })),
 
     markPaymentUnlockPending: assign(() => ({
diff --git a/src/stores/chat/chat-state.ts b/src/stores/chat/chat-state.ts
index 3d1baa78..15376a66 100644
--- a/src/stores/chat/chat-state.ts
+++ b/src/stores/chat/chat-state.ts
@@ -5,16 +5,7 @@ export interface ChatState {
   isReplyingAI: boolean;
   pendingReplyCount: number;
   upgradePromptVisible: boolean;
-  upgradeReason: "daily_limit" | "image" | null;
-  upgradeHint: string | null;
-  upgradeDetail:
-    | {
-        type?: string;
-        usedToday?: number;
-        usedTotal?: number;
-        limit?: number;
-      }
-    | null;
+  upgradeReason: "daily_limit" | null;
   isLoadingMore: boolean;
   hasMore: boolean;
   historyOffset: number;
@@ -36,8 +27,6 @@ export const initialState: ChatState = {
   pendingReplyCount: 0,
   upgradePromptVisible: false,
   upgradeReason: null,
-  upgradeHint: null,
-  upgradeDetail: null,
   isLoadingMore: false,
   hasMore: true,
   historyOffset: 0,