refactor(chat): remove guest history synchronization

src/data/mock/chat/requests/sync-guest-messages.json

@@ -1,15 +0,0 @@
-{
-  "characterId": "elio",
-  "messages": [
-    {
-      "role": "user",
-      "content": "Hi Elio.",
-      "timestamp": "2026-06-23T02:10:00.000Z"
-    },
-    {
-      "role": "assistant",
-      "content": "Hi, I am right here with you.",
-      "timestamp": "2026-06-23T02:10:04.000Z"
-    }
-  ]
-}

src/data/repositories/chat_remote_data_source.ts

@@ -6,8 +6,6 @@ import type {
 import {
   ChatHistoryResponse,
   ChatPreviewsResponse,
-  ChatSyncRequest,
-  ChatSyncRequestSchema,
   ChatSendResponse,
   SendMessageRequestSchema,
   UnlockHistoryRequestSchema,
@@ -58,15 +56,6 @@ export class ChatRemoteDataSource {
     return Result.wrap(() => this.api.getPreviews(options));
   }
 
-  async syncGuestHistory(
-    request: ChatSyncRequest,
-    options?: ChatRequestOptions,
-  ): Promise<Result<void>> {
-    return Result.wrap(() =>
-      this.api.syncGuestHistory(ChatSyncRequestSchema.parse(request), options),
-    );
-  }
-
   async getHistory(
     characterId: string,
     limit = 50,

src/data/repositories/chat_repository.ts

@@ -10,7 +10,6 @@ import type {
 import type {
   ChatHistoryResponse,
   ChatPreviewsResponse,
-  ChatSyncRequest,
   ChatMessage,
   ChatSendResponse,
   UnlockHistoryResponse,
@@ -63,13 +62,6 @@ export class ChatRepository implements IChatRepository {
     return this.remote.getPreviews(options);
   }
 
-  async syncGuestHistory(
-    request: ChatSyncRequest,
-    options?: ChatRequestOptions,
-  ): Promise<Result<void>> {
-    return this.remote.syncGuestHistory(request, options);
-  }
-
   /** 解锁单条历史付费 / 私密消息。 */
   async unlockPrivateMessage(
     input: UnlockPrivateMessageInput,

src/data/repositories/interfaces/ichat_repository.ts

@@ -7,7 +7,6 @@
 import type {
   ChatHistoryResponse,
   ChatPreviewsResponse,
-  ChatSyncRequest,
   ChatImageData,
   ChatLockDetailData,
   ChatLockType,
@@ -79,12 +78,6 @@ export interface IChatRepository {
     options?: ChatRequestOptions,
   ): Promise<Result<ChatPreviewsResponse>>;
 
-  /** 把一个角色的游客历史同步到正式账号。 */
-  syncGuestHistory(
-    request: ChatSyncRequest,
-    options?: ChatRequestOptions,
-  ): Promise<Result<void>>;
-
   /** 解锁单条历史付费 / 私密消息。 */
   unlockPrivateMessage(
     input: UnlockPrivateMessageInput,

src/data/schemas/chat/__tests__/multi_role_contract.test.ts

@@ -2,7 +2,6 @@ import { describe, expect, it } from "vitest";
 
 import {
   ChatPreviewsResponseSchema,
-  ChatSyncRequestSchema,
   SendMessageRequestSchema,
 } from "@/data/schemas/chat";
 
@@ -26,23 +25,12 @@ describe("multi-role chat schemas", () => {
     ).toThrow();
   });
 
-  it("parses nullable previews and immutable sync messages", () => {
+  it("parses nullable immutable previews", () => {
     const previews = ChatPreviewsResponseSchema.parse({
       items: [{ characterId: "elio", message: null }],
     });
-    const sync = ChatSyncRequestSchema.parse({
-      characterId: "elio",
-      messages: [
-        {
-          role: "assistant",
-          content: "Welcome back",
-          timestamp: "2026-07-20T00:00:00.000Z",
-        },
-      ],
-    });
 
     expect(previews.items[0]?.message).toBeNull();
     expect(Object.isFrozen(previews.items)).toBe(true);
-    expect(Object.isFrozen(sync.messages)).toBe(true);
   });
 });

src/data/schemas/chat/index.ts

@@ -7,7 +7,6 @@ export * from "./chat_media";
 export * from "./chat_message";
 export * from "./chat_payloads";
 export * from "./request/send_message_request";
-export * from "./request/chat_sync_request";
 export * from "./request/unlock_history_request";
 export * from "./request/unlock_private_request";
 export * from "./response/chat_history_response";

src/data/schemas/chat/request/chat_sync_request.ts

@@ -1,19 +0,0 @@
-import { z } from "zod";
-
-export const ChatSyncMessageSchema = z
-  .object({
-    role: z.enum(["user", "assistant"]),
-    content: z.string(),
-    timestamp: z.string().min(1),
-  })
-  .readonly();
-
-export const ChatSyncRequestSchema = z
-  .object({
-    characterId: z.string().min(1),
-    messages: z.array(ChatSyncMessageSchema).min(1).readonly(),
-  })
-  .readonly();
-
-export type ChatSyncRequestInput = z.input<typeof ChatSyncRequestSchema>;
-export type ChatSyncRequest = z.output<typeof ChatSyncRequestSchema>;

src/data/schemas/chat/request/index.ts

@@ -3,6 +3,5 @@
  */
 
 export * from "./send_message_request";
-export * from "./chat_sync_request";
 export * from "./unlock_private_request";
 export * from "./unlock_history_request";

src/data/services/api/__tests__/multi_character_api.test.ts

@@ -1,7 +1,6 @@
 import { beforeEach, describe, expect, it, vi } from "vitest";
 
 import {
-  ChatSyncRequestSchema,
   SendMessageRequestSchema,
   UnlockHistoryRequestSchema,
   UnlockPrivateRequestSchema,
@@ -74,30 +73,16 @@ describe("multi-character API contract", () => {
     });
   });
 
-  it("loads previews and syncs guest history", async () => {
+  it("loads chat previews", async () => {
     const api = new ChatApi();
-    httpClientMock
-      .mockResolvedValueOnce({ success: true, data: { items: [] } })
-      .mockResolvedValueOnce({ success: true, data: {} });
+    httpClientMock.mockResolvedValueOnce({
+      success: true,
+      data: { items: [] },
+    });
 
     await api.getPreviews();
-    const request = ChatSyncRequestSchema.parse({
-      characterId: CHARACTER_ID,
-      messages: [
-        {
-          role: "user",
-          content: "Hello",
-          timestamp: "2026-07-20T00:00:00.000Z",
-        },
-      ],
-    });
-    await api.syncGuestHistory(request);
 
-    expect(httpClientMock).toHaveBeenNthCalledWith(1, "/api/chat/previews", {});
-    expect(httpClientMock).toHaveBeenNthCalledWith(2, "/api/chat/sync", {
-      method: "POST",
-      body: request,
-    });
+    expect(httpClientMock).toHaveBeenCalledWith("/api/chat/previews", {});
   });
 
   it("forwards request cancellation to the HTTP client", async () => {

src/data/services/api/api_contract.json

@@ -26,6 +26,5 @@
   "reportUserInfo": { "method": "post", "path": "/api/data/report-user-info" },
   "feedback": { "method": "post", "path": "/api/feedback" },
   "characters": { "method": "get", "path": "/api/characters" },
-  "chatPreviews": { "method": "get", "path": "/api/chat/previews" },
-  "chatSync": { "method": "post", "path": "/api/chat/sync" }
+  "chatPreviews": { "method": "get", "path": "/api/chat/previews" }
 }

src/data/services/api/api_path.ts

@@ -104,6 +104,4 @@ export class ApiPath {
 
   static readonly chatPreviews = apiContract.chatPreviews.path;
 
-  static readonly chatSync = apiContract.chatSync.path;
-
 }

src/data/services/api/chat_api.ts

@@ -11,7 +11,6 @@ import {
   ChatPreviewsResponseSchema,
   ChatSendResponse,
   ChatSendResponseSchema,
-  ChatSyncRequest,
   SendMessageRequest,
   UnlockHistoryRequest,
   UnlockHistoryResponse,
@@ -67,17 +66,6 @@ export class ChatApi {
     return ChatPreviewsResponseSchema.parse(unwrap(env));
   }
 
-  async syncGuestHistory(
-    body: ChatSyncRequest,
-    options?: { signal?: AbortSignal },
-  ): Promise<void> {
-    await httpClient<ApiEnvelope<unknown>>(ApiPath.chatSync, {
-      method: "POST",
-      body,
-      ...(options?.signal ? { signal: options.signal } : {}),
-    }).then(unwrap);
-  }
-
   /**
    * 解锁单条历史付费 / 私密消息
    */

src/data/storage/navigation/navigation_storage.ts

@@ -259,22 +259,6 @@ export class NavigationStorage {
     await SessionAsyncUtil.remove(StorageKeys.pendingChatImageReturn);
   }
 
-  static async saveGuestChatOwnerKey(ownerKey: string): Promise<void> {
-    await SessionAsyncUtil.setJson(
-      StorageKeys.guestChatOwnerKey,
-      ownerKey,
-      z.string().min(1),
-    );
-  }
-
-  static async getGuestChatOwnerKey(): Promise<string | null> {
-    const result = await SessionAsyncUtil.getJson(
-      StorageKeys.guestChatOwnerKey,
-      z.string().min(1),
-    );
-    return Result.isOk(result) ? result.data : null;
-  }
-
   private static parsePendingChatUnlock(
     value: PendingChatUnlock | null,
   ): PendingChatUnlock | null {

src/data/storage/storage_keys.ts

@@ -28,7 +28,6 @@ export const StorageKeys = {
   pendingChatImageReturn: "pending_chat_image_return",
   pendingChatUnlock: "pending_chat_unlock",
   pendingChatPromotion: "pending_chat_promotion",
-  guestChatOwnerKey: "guest_chat_owner_key",
 
   // pwa / app info
   pwaDialogShown: "pwa_dialog_shown",

src/stores/chat/__tests__/guest-history-sync.test.ts

@@ -1,84 +0,0 @@
-import { beforeEach, describe, expect, it, vi } from "vitest";
-
-import { Result } from "@/utils/result";
-
-const mocks = vi.hoisted(() => ({
-  getDeviceId: vi.fn(),
-  getLocalMessages: vi.fn(),
-  syncGuestHistory: vi.fn(),
-  clearLocalMessages: vi.fn(),
-  getGuestChatOwnerKey: vi.fn(),
-}));
-
-vi.mock("@/data/storage/auth", () => ({
-  AuthStorage: {
-    getInstance: () => ({ getDeviceId: mocks.getDeviceId }),
-  },
-}));
-
-vi.mock("@/data/repositories/chat_repository_loader", () => ({
-  loadChatRepository: async () => ({
-    getLocalMessages: mocks.getLocalMessages,
-    syncGuestHistory: mocks.syncGuestHistory,
-    clearLocalMessages: mocks.clearLocalMessages,
-  }),
-}));
-
-vi.mock("@/data/storage/navigation", () => ({
-  NavigationStorage: {
-    getGuestChatOwnerKey: mocks.getGuestChatOwnerKey,
-  },
-}));
-
-import { syncGuestHistoriesToUser } from "../guest-history-sync";
-
-describe("syncGuestHistoriesToUser", () => {
-  beforeEach(() => {
-    vi.clearAllMocks();
-    mocks.getDeviceId.mockResolvedValue(Result.ok("device-1"));
-    mocks.getGuestChatOwnerKey.mockResolvedValue(null);
-    mocks.clearLocalMessages.mockResolvedValue(Result.ok(undefined));
-  });
-
-  it("groups guest history by character and clears only successful caches", async () => {
-    mocks.getLocalMessages.mockImplementation(async (identity: string) =>
-      Result.ok([
-        {
-          id: `${identity}:message`,
-          role: "user",
-          type: "text",
-          content: identity,
-          createdAt: "2026-07-20T00:00:00.000Z",
-        },
-      ]),
-    );
-    mocks.syncGuestHistory.mockImplementation(
-      async (request: { characterId: string }) =>
-        request.characterId === "elio"
-          ? Result.ok(undefined)
-          : Result.err(new Error("offline")),
-    );
-
-    await syncGuestHistoriesToUser(["elio", "maya-tan"]);
-
-    expect(mocks.syncGuestHistory).toHaveBeenCalledTimes(2);
-    expect(mocks.syncGuestHistory).toHaveBeenCalledWith(
-      expect.objectContaining({ characterId: "elio" }),
-    );
-    expect(mocks.syncGuestHistory).toHaveBeenCalledWith(
-      expect.objectContaining({ characterId: "maya-tan" }),
-    );
-    expect(mocks.clearLocalMessages).toHaveBeenCalledOnce();
-    expect(mocks.clearLocalMessages).toHaveBeenCalledWith(
-      "device:device-1::character:elio",
-    );
-  });
-
-  it("skips characters without guest messages", async () => {
-    mocks.getLocalMessages.mockResolvedValue(Result.ok([]));
-
-    await syncGuestHistoriesToUser(["elio"]);
-
-    expect(mocks.syncGuestHistory).not.toHaveBeenCalled();
-  });
-});

src/stores/chat/guest-history-sync.ts

@@ -1,65 +0,0 @@
-import { AuthStorage } from "@/data/storage/auth";
-import { NavigationStorage } from "@/data/storage/navigation";
-import { loadChatRepository } from "@/data/repositories/chat_repository_loader";
-import { ChatSyncRequestSchema } from "@/data/schemas/chat";
-import { buildChatConversationKey } from "@/lib/chat/chat_cache_keys";
-import { Logger } from "@/utils/logger";
-import { Result } from "@/utils/result";
-
-const log = new Logger("StoresChatGuestHistorySync");
-
-export async function syncGuestHistoriesToUser(
-  characterIds: readonly string[],
-): Promise<void> {
-  const deviceResult = await AuthStorage.getInstance().getDeviceId();
-  const savedOwnerKey = await NavigationStorage.getGuestChatOwnerKey();
-  const ownerKey =
-    savedOwnerKey ??
-    (Result.isOk(deviceResult) && deviceResult.data
-      ? `device:${deviceResult.data}`
-      : null);
-  if (!ownerKey) return;
-
-  const repository = await loadChatRepository();
-  await Promise.allSettled(
-    [...new Set(characterIds)].map(async (characterId) => {
-      const cacheIdentity = buildChatConversationKey(ownerKey, characterId);
-      const messagesResult = await repository.getLocalMessages(cacheIdentity);
-      if (Result.isErr(messagesResult) || messagesResult.data.length === 0) return;
-
-      const messages = messagesResult.data.flatMap((message) => {
-        if (message.role !== "user" && message.role !== "assistant") return [];
-        return [{
-          role: message.role,
-          content: message.content,
-          timestamp: normalizeTimestamp(message.createdAt),
-        }];
-      });
-      if (messages.length === 0) return;
-
-      const request = ChatSyncRequestSchema.parse({ characterId, messages });
-      const syncResult = await repository.syncGuestHistory(request);
-      if (Result.isErr(syncResult)) {
-        log.warn("[chat-sync] guest history sync failed", {
-          characterId,
-          error: syncResult.error,
-        });
-        return;
-      }
-      const clearResult = await repository.clearLocalMessages(cacheIdentity);
-      if (Result.isErr(clearResult)) {
-        log.warn("[chat-sync] guest history cleanup failed", {
-          characterId,
-          error: clearResult.error,
-        });
-      }
-    }),
-  );
-}
-
-function normalizeTimestamp(value: string): string {
-  const parsed = new Date(value);
-  return Number.isNaN(parsed.getTime())
-    ? new Date().toISOString()
-    : parsed.toISOString();
-}

src/stores/sync/chat-auth-sync.tsx

@@ -16,11 +16,6 @@ import {
   useAuthSelector,
 } from "@/stores/auth/auth-context";
 import { useChatDispatch } from "@/stores/chat/chat-context";
-import { syncGuestHistoriesToUser } from "@/stores/chat/guest-history-sync";
-import { useCharacterCatalog } from "@/providers/character-catalog-provider";
-import { resolveChatCacheOwnerKey } from "@/data/repositories/chat_cache_identity";
-import { NavigationStorage } from "@/data/storage/navigation";
-import { Result } from "@/utils/result";
 
 export function ChatAuthSync() {
   const authState = useAuthSelector(
@@ -32,7 +27,6 @@ export function ChatAuthSync() {
     shallowEqual,
   );
   const chatDispatch = useChatDispatch();
-  const characterCatalog = useCharacterCatalog();
   const prevSessionKeyRef = useRef<string | null>(null);
 
   useEffect(() => {
@@ -48,27 +42,14 @@ export function ChatAuthSync() {
     }
 
     if (authState.loginStatus === "guest") {
-      let cancelled = false;
-      void (async () => {
-        const ownerResult = await resolveChatCacheOwnerKey();
-        if (Result.isOk(ownerResult)) {
-          await NavigationStorage.saveGuestChatOwnerKey(ownerResult.data);
-        }
-        if (!cancelled) chatDispatch({ type: "ChatGuestLogin" });
-      })();
-      return () => {
-        cancelled = true;
-      };
+      chatDispatch({ type: "ChatGuestLogin" });
+      return;
     }
 
     let cancelled = false;
     void (async () => {
       const tokenR = await AuthStorage.getInstance().getLoginToken();
       if (!cancelled && tokenR.success && tokenR.data) {
-        await syncGuestHistoriesToUser(
-          characterCatalog.characters.map((character) => character.id),
-        );
-        if (cancelled) return;
         chatDispatch({
           type: "ChatUserLogin",
           token: tokenR.data,
@@ -83,7 +64,6 @@ export function ChatAuthSync() {
     authState.hasInitialized,
     authState.isLoading,
     authState.loginStatus,
-    characterCatalog.characters,
     chatDispatch,
   ]);