refactor(chat): rely on server message limits

src/stores/chat/chat-machine.ts

@@ -15,36 +15,33 @@
  *   - `nonVipUserSession`（parent）：非 VIP 用户会话 —— 不 invoke WS
  *   - `vipUserSession`（parent）：VIP 用户会话 —— invoke WS（持久）
  *
- * init 双任务（核心重构）：
- *   - guestSession.initializing：loadQuota + loadHistory 并行（`invoke: [...]` 数组）
+ * init 任务：
+ *   - guestSession.initializing：loadHistory
  *   - nonVipUserSession.initializing：loadHistory
  *   - vipUserSession.initializing：loadHistory + parent-level chatWebSocket 并行
  *   - 每个任务都是独立 actor，不互相等待（除非 `always` barrier）
  *
  * 消息发送路径（业务事实）：
- *   - guestSession：走 HTTP，并先检查本地游客配额
+ *   - guestSession：走 HTTP，消息数量限制以后端 `blocked` 响应为准
  *   - nonVipUserSession：走 HTTP，让后端返回 daily_limit blocked
  *   - vipUserSession + WS 已连：走 WS，不受每日免费次数限制
  *   - `ChatWebSocketConnected` 事件 → `wsConnected = true`
  *   - `vipUserSession.exit` action → `wsConnected = false`（WS actor cleanup 时也会跑 exit）
  *
  * 配额：
- *   - 游客：保留本地配额 guard，命中后不发送消息
- *   - 注册非 VIP：以后端 `blocked=true && blockReason="daily_limit"` 为准
- *   - `appendUserMessage` 减 `context.wsConnected ? q : Math.max(0, q-1)` —— WS 已连时不递减
+ *   - 前端不再处理本地消息额度；游客 / 注册用户均以后端响应为准。
+ *   - 后端返回 `blocked=true && blockReason="daily_limit"` 时展示会员引导。
  *
  */
 
 import { setup, assign } from "xstate";
 
-import { ChatStorage } from "@/data/storage/chat/chat_storage";
 import { todayString, Logger } from "@/utils";
 
 import { ChatState, initialState } from "./chat-state";
 import type { ChatEvent } from "./chat-events";
 import { applyHttpSendOutput } from "./chat-machine.helpers";
 import {
-  loadQuotaActor,
   loadHistoryActor,
   sendMessageHttpActor,
   sendMessageWsActor,
@@ -68,7 +65,6 @@ export const chatMachine = setup({
     events: {} as ChatEvent,
   },
   actors: {
-    loadQuota: loadQuotaActor,
     loadHistory: loadHistoryActor,
     sendMessageHttp: sendMessageHttpActor,
     sendMessageWs: sendMessageWsActor,
@@ -91,25 +87,11 @@ export const chatMachine = setup({
     appendGuestUserMessage: assign(({ context, event }) => {
       if (event.type !== "ChatSendMessage") return {};
 
-      // 游客消息发送成功前先乐观扣减本地日配额 + 总配额。
-      const newRemaining = Math.max(0, context.guestRemainingQuota - 1);
-      const newTotal = Math.max(0, context.guestTotalQuota - 1);
-
-      // 持久化两个额度（ fire-and-forget，不 await —— assign 是 sync）
-      // daily quota 需要 today 字符串（让 ChatStorage 跨天判断 reset）
       const today = todayString();
-      ChatStorage.getInstance().setGuestDailyChatQuota(newRemaining, today);
-
-      ChatStorage.getInstance().setGuestTotalQuota(newTotal);
-
       log.debug("[chat-machine] appendGuestUserMessage", {
         contentLength: event.content.length,
         contentPreview: event.content.slice(0, 50),
-        quotaMode: "guest http (decrement)",
-        oldRemaining: context.guestRemainingQuota,
-        newRemaining,
-        oldTotal: context.guestTotalQuota,
-        newTotal,
+        quotaMode: "server controlled",
         isReplyingAI: true,
       });
 
@@ -123,8 +105,6 @@ export const chatMachine = setup({
           },
         ],
         isReplyingAI: true,
-        guestRemainingQuota: newRemaining,
-        guestTotalQuota: newTotal,
         paywallTriggered: false,
         paywallReason: null,
         paywallDetail: null,
@@ -160,22 +140,11 @@ export const chatMachine = setup({
 
     appendGuestUserImage: assign(({ context, event }) => {
       if (event.type !== "ChatSendImage") return {};
-      // 同 appendGuestUserMessage：游客两个额度同步减
-      const newRemaining = Math.max(0, context.guestRemainingQuota - 1);
-      const newTotal = Math.max(0, context.guestTotalQuota - 1);
-        
-      const today = todayString();
-      void ChatStorage.getInstance().setGuestDailyChatQuota(newRemaining, today);
 
-      void ChatStorage.getInstance().setGuestTotalQuota(newTotal);
-      
+      const today = todayString();
       log.debug("[chat-machine] appendGuestUserImage", {
         oldMessagesCount: context.messages.length,
-        quotaMode: "guest http (decrement)",
-        oldRemaining: context.guestRemainingQuota,
-        newRemaining,
-        oldTotal: context.guestTotalQuota,
-        newTotal,
+        quotaMode: "server controlled",
       });
       return {
         messages: [
@@ -188,8 +157,6 @@ export const chatMachine = setup({
           },
         ],
         isReplyingAI: true,
-        guestRemainingQuota: newRemaining,
-        guestTotalQuota: newTotal,
         paywallTriggered: false,
         paywallReason: null,
         paywallDetail: null,
@@ -309,10 +276,6 @@ export const chatMachine = setup({
       };
     }),
 
-    incrementQuotaExceeded: assign(({ context }) => ({
-      quotaExceededTrigger: context.quotaExceededTrigger + 1,
-    })),
-
     setWsConnected: assign({ wsConnected: true }),
     clearWsConnected: assign({ wsConnected: false }),
   },
@@ -356,94 +319,44 @@ export const chatMachine = setup({
       initial: "initializing",
       states: {
         initializing: {
-          // "always" barrier：两个任务都完成才进 ready
+          // 本地游客额度逻辑已停用：只等待历史加载完成。
           always: [
             {
               target: "ready",
-              guard: ({ context }) => context.quotaLoaded && context.historyLoaded,
+              guard: ({ context }) => context.historyLoaded,
             },
           ],
-          invoke: [
-            // 任务 1：加载配额（fromPromise，返结果 + onDone 设 flag）
-            {
-              id: "loadQuota",
-              src: "loadQuota",
-              onDone: {
-                actions: assign(({ event }) => ({
-                  guestRemainingQuota: event.output.remaining,
-                  guestTotalQuota: event.output.total,
-                  quotaLoaded: true,
-                })),
-              },
-              onError: {
-                // 失败也标 loaded，不卡 init（游客可能 quota 服务不可用，让 UI 进 ready）
-                actions: assign({
-                  quotaLoaded: true,
-                }),
-              },
+          invoke: {
+            id: "loadHistory",
+            src: "loadHistory",
+            onDone: {
+              actions: assign(({ event }) => ({
+                messages: event.output.messages,
+                hasMore: event.output.hasMore,
+                historyOffset: event.output.newOffset,
+                historyLoaded: true,
+              })),
             },
-            // 任务 2：拉 history（fromPromise，返回最终 network messages）
-            {
-              id: "loadHistory",
-              src: "loadHistory",
-              onDone: {
-                actions: assign(({ event }) => ({
-                  messages: event.output.messages,
-                  hasMore: event.output.hasMore,
-                  historyOffset: event.output.newOffset,
-                  historyLoaded: true,
-                })),
-              },
-              onError: {
-                // 失败也标 loaded，不卡 init（让 UI 还是能进 ready，屏幕可能空）
-                actions: assign({
-                  historyLoaded: true,
-                }),
-              },
+            onError: {
+              // 失败也标 loaded，不卡 init（让 UI 还是能进 ready，屏幕可能空）
+              actions: assign({
+                historyLoaded: true,
+              }),
             },
-          ],
+          },
         },
         ready: {
           on: {
-            // 配额检查 + 发送消息（3 条 guard，按顺序匹配）
-            // 1. 总配额（guestTotalQuota）不足 → 触发 quota exceeded dialog，不发送
-            // 2. 每日配额（guestRemainingQuota）不足 → 同上
-            // 3. 两个配额都 OK + 内容非空 → 发送 + 减配额
-            ChatSendMessage: [
-              // 1. 总配额 不足（guestTotalQuota <= 0） → 触发 quota exceeded dialog
-              {
-                guard: ({ context }) => context.guestTotalQuota <= 0,
-                actions: "incrementQuotaExceeded",
-              },
-              // 2. 每日配额 不足（guestRemainingQuota <= 0） → 触发 quota exceeded dialog
-              {
-                guard: ({ context }) => context.guestRemainingQuota <= 0,
-                actions: "incrementQuotaExceeded",
-              },
-              // 3. 两个配额都 OK + 内容非空 → 发送（只用 appendUserMessage 自己的日志）
-              {
-                actions: "appendGuestUserMessage",
-                guard: ({ event }) => event.content.trim().length > 0,
-                target: "sending",
-              },
-            ],
-            // 配额检查 + 发送图片（同样 3 条 guard，不检查 "内容空"）
-            ChatSendImage: [
-              {
-                guard: ({ context }) => context.guestTotalQuota <= 0,
-                actions: "incrementQuotaExceeded",
-              },
-              {
-                guard: ({ context }) => context.guestRemainingQuota <= 0,
-                actions: "incrementQuotaExceeded",
-              },
-              {
-                actions: "appendGuestUserImage",
-                target: "sending",
-              },
-            ],
+            ChatSendMessage: {
+              actions: "appendGuestUserMessage",
+              guard: ({ event }) => event.content.trim().length > 0,
+              target: "sending",
+            },
+            ChatSendImage: {
+              actions: "appendGuestUserImage",
+              target: "sending",
+            },
             // 删除 ChatLoadMoreHistory / WS handlers —— 游客无服务端 history，也不连接 WS
-            ChatQuotaExceeded: { actions: "incrementQuotaExceeded" },
           },
         },
         sending: {
@@ -524,7 +437,6 @@ export const chatMachine = setup({
             ChatLoadMoreHistory: {
               target: "loadingMore",
             },
-            ChatQuotaExceeded: { actions: "incrementQuotaExceeded" },
           },
         },
         sendingViaHttp: {
@@ -665,7 +577,6 @@ export const chatMachine = setup({
             ChatLoadMoreHistory: {
               target: "loadingMore",
             },
-            ChatQuotaExceeded: { actions: "incrementQuotaExceeded" },
             // 注：ChatAISentenceReceived / ChatWebSocketError / ChatWebSocketConnected
             //     已上提到 vipUserSession.on，子级不再声明
           },