fix(chat): clear limit prompt after payment

src/stores/chat/chat-machine.ts

@@ -218,6 +218,13 @@ export const chatMachine = setup({
       return applyHttpSendOutput(context, event.output);
     }),
 
+    clearUpgradePrompt: assign(() => ({
+      upgradePromptVisible: false,
+      upgradeReason: null,
+      upgradeHint: null,
+      upgradeDetail: null,
+    })),
+
     markPaymentUnlockPending: assign(() => ({
       paymentUnlockPending: true,
       unlockHistoryError: null,
@@ -290,7 +297,6 @@ export const chatMachine = setup({
       initial: "initializing",
       states: {
         initializing: {
-          // 本地游客额度逻辑已停用：只等待历史加载完成。
           always: [
             {
               target: "ready",
@@ -376,21 +382,21 @@ export const chatMachine = setup({
             guard: ({ context }) =>
               context.historyLoaded && shouldAutoUnlockHistory(context.messages),
             target: ".unlockingHistory",
-            actions: "markUnlockHistoryStarted",
+            actions: ["clearUpgradePrompt", "markUnlockHistoryStarted"],
           },
           {
             guard: ({ context }) =>
               context.historyLoaded &&
               shouldPromptUnlockHistory(context.messages),
-            actions: "showUnlockHistoryPrompt",
+            actions: ["clearUpgradePrompt", "showUnlockHistoryPrompt"],
           },
           {
             guard: ({ context }) => !context.historyLoaded,
-            actions: "markPaymentUnlockPending",
+            actions: ["clearUpgradePrompt", "markPaymentUnlockPending"],
           },
           {
             guard: ({ context }) => context.historyLoaded,
-            actions: "dismissUnlockHistoryPrompt",
+            actions: ["clearUpgradePrompt", "dismissUnlockHistoryPrompt"],
           },
         ],
         ChatUnlockHistoryConfirmed: {