refactor(chat): remove guest history synchronization

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
    */