chore(chat): refactor chat init into separate quota and history actors

Split `chatInitActor` into `loadQuotaActor` (guest quota fetch) and `loadHistoryActor` (local → network → save sync), and add `quotaLoaded` / `historyLoaded` state flags so the UI can display loading status during the new local-first history hydration flow. Also drop the now-unused `ChatInit` event and pipe Next.js stdout/stderr to a persistent log file in the post-receive hook for easier troubleshooting.

src/stores/chat/chat-machine.actors.ts

@@ -2,9 +2,10 @@
  * Chat 状态机：4 个 XState actor
  *
  * 从 `chat-machine.ts` 抽出的"Actors"段：
- *   - `chatInitActor`（fromPromise，**仅**游客有意义）
+ *   - `loadQuotaActor`（fromPromise，**仅**游客有意义 —— 拉**日**配 + 总**配**）
+ *   - `loadHistoryActor`（fromPromise —— local → network → save network to local 3 **步**）
  *   - `sendMessageHttpActor`（fromPromise，**已** wire —— "一次发送 = 一次返回"）
- *   - `loadMoreHistoryActor`（fromPromise）
+ *   - `loadMoreHistoryActor`（fromPromise —— 翻**页**，**不**走 local-first）
  *   - `chatWebSocketActor`（fromCallback，长生命周期 —— **仅** userSession 期间 invoke）
  *
  * 设计：
@@ -23,17 +24,62 @@ import {
   PAGE_SIZE,
   chatRepo,
   localMessagesToUi,
-  readInitData,
+  readAndSyncHistory,
+  readGuestQuota,
   sendResponseToUiMessage,
-  type InitResult,
 } from "./chat-machine.helpers";
 import type { ChatEvent } from "./chat-events";
 
-// ============================================================// HTTP: one-shot Promise
 // ============================================================
-/** 拉初始数据（**仅**游客有意义） */
-export const chatInitActor = fromPromise<InitResult>(async () => readInitData());
+// Init 任务 1：拉游客配额（fromPromise，**纯** local）
+// ============================================================
+/**
+ * 拉游客**日**配 + 总**配**（**仅** guestSession 期间 invoke）
+ * - 失**败**返 `{ remaining: 0, total: 0 }`（**不**抛，**让** UI **还**是**能**进** ready）
+ * - onDone 在 state machine **里**赋 guestRemainingQuota + guestTotalQuota + 设 quotaLoaded: true
+ */
+export const loadQuotaActor = fromPromise<{
+  remaining: number;
+  total: number;
+}>(async () => {
+  console.log("[chat-machine] loadQuotaActor ENTRY");
+  const result = await readGuestQuota();
+  console.log("[chat-machine] loadQuotaActor DONE", result);
+  return result;
+});
 
+// ============================================================
+// Init 任务 2：拉 history 3 步流（fromPromise，**返**回**最**终**结**果**）
+// ============================================================
+/**
+ * local → network → save network to local 3 步流（**返**回** network **最**终** messages**）
+ * - 选**方**案 A（fromPromise）：UI **不**会**看**到** local 中**间**态**，**直**接**显**示** network **结**果**
+ * - 内部 3 步**走** helper `readAndSyncHistory`（**日**志**全**在** helper **里**）
+ * - 失**败**返 local（**退**而**求**其**次**）
+ */
+export const loadHistoryActor = fromPromise<{
+  messages: UiMessage[];
+  hasMore: boolean;
+  newOffset: number;
+  localOverwritten: boolean;
+  localCount: number;
+  networkCount: number;
+}>(async () => {
+  console.log("[chat-machine] loadHistoryActor ENTRY");
+  const result = await readAndSyncHistory();
+  console.log("[chat-machine] loadHistoryActor DONE", {
+    finalCount: result.messages.length,
+    localCount: result.localCount,
+    networkCount: result.networkCount,
+    hasMore: result.hasMore,
+    localOverwritten: result.localOverwritten,
+  });
+  return result;
+});
+
+// ============================================================
+// HTTP: one-shot Promise
+// ============================================================
 /**
  * HTTP 发送消息（**一次发送 = 一次返回**）
  * - 后端响应**就**是 AI 回复（`ChatSendResponse.reply: string`）
@@ -76,7 +122,7 @@ export const sendMessageHttpActor = fromPromise<
   return { reply };
 });
 
-/** 翻历史（pagination） */
+/** 翻历史（pagination）—— **不**走 local-first，**纯** server fetch */
 export const loadMoreHistoryActor = fromPromise<
   { messages: UiMessage[]; hasMore: boolean; newOffset: number },
   { offset: number }
@@ -123,7 +169,8 @@ export const loadMoreHistoryActor = fromPromise<
   };
 });
 
-// ============================================================// WebSocket: long-lived callback
+// ============================================================
+// WebSocket: long-lived callback
 // ============================================================
 /**
  * 长生命周期 WebSocket（**仅** `userSession` 期间 invoke）