fix(e2e): stabilize authenticated unlock flows

src/stores/chat/__tests__/chat-helpers.test.ts

@@ -55,6 +55,7 @@ function makeChatState(overrides: Partial<ChatState> = {}): ChatState {
     requiredCredits: 0,
     shortfallCredits: 0,
     historyLoaded: true,
+    networkHistoryLoaded: true,
     historyTotal: 0,
     historyLimit: 50,
     nextHistoryOffset: 0,
@@ -267,6 +268,8 @@ describe("chat history pagination helpers", () => {
       limit: 0,
     });
 
+    expect(nextState.networkHistoryLoaded).toBe(true);
+
     expect(nextState.historyLimit).toBe(50);
     expect(nextState.nextHistoryOffset).toBe(50);
     expect(nextState.historyTotal).toBe(120);

src/stores/chat/chat-context.tsx

@@ -22,6 +22,8 @@ interface ChatState {
   upgradeReason: MachineContext["upgradeReason"];
   /** True as soon as a local snapshot or the first network result is renderable. */
   historyLoaded: boolean;
+  /** True after the network history request has completed or failed. */
+  networkHistoryLoaded: boolean;
   hasMoreHistory: boolean;
   isLoadingMoreHistory: boolean;
   unlockHistoryPromptVisible: boolean;
@@ -93,6 +95,7 @@ function selectChatState(state: ChatSnapshot): SelectedChatState {
     upgradePromptVisible: state.context.upgradePromptVisible,
     upgradeReason: state.context.upgradeReason,
     historyLoaded: state.context.historyLoaded,
+    networkHistoryLoaded: state.context.networkHistoryLoaded,
     hasMoreHistory:
       state.context.historyLoaded &&
       state.context.nextHistoryOffset < state.context.historyTotal,

src/stores/chat/chat-state.ts

@@ -46,6 +46,8 @@ export interface ChatState {
   shortfallCredits: number;
   /** history 首屏可展示标志（本地快照加载完成即可进入 ready）。 */
   historyLoaded: boolean;
+  /** 网络历史已返回或已明确失败；用于避免过早判定深链消息不存在。 */
+  networkHistoryLoaded: boolean;
   historyTotal: number;
   historyLimit: number;
   nextHistoryOffset: number;
@@ -80,6 +82,7 @@ export function createInitialChatState(
     requiredCredits: 0,
     shortfallCredits: 0,
     historyLoaded: false,
+    networkHistoryLoaded: false,
     historyTotal: 0,
     historyLimit: 50,
     nextHistoryOffset: 0,

src/stores/chat/helper/history.ts

@@ -29,6 +29,7 @@ export function applyNetworkHistoryLoadedOutput(
   ChatState,
   | "messages"
   | "historyLoaded"
+  | "networkHistoryLoaded"
   | "historyTotal"
   | "historyLimit"
   | "nextHistoryOffset"
@@ -47,6 +48,7 @@ export function applyNetworkHistoryLoadedOutput(
   return {
     messages: [...output.messages, ...optimisticTail],
     historyLoaded: true,
+    networkHistoryLoaded: true,
     historyTotal: Math.max(0, output.total),
     historyLimit,
     nextHistoryOffset: historyLimit,

src/stores/chat/machine/history-flow.ts

@@ -55,6 +55,7 @@ const markHistoryLoadFailedAction = baseChatMachineSetup.assign(
     const characterErrorCode = getCharacterErrorCode(event.error);
     return {
       historyLoaded: true,
+      networkHistoryLoaded: true,
       characterErrorCode,
       canSendMessage:
         characterErrorCode === "CHARACTER_DISABLED" ||