refactor(schemas): group network schemas by direction

Move request and response schemas into matching subdirectories, extract the shared chat lock type, and update barrels and imports without changing wire formats.

src/data/schemas/chat/response/chat_send_response.ts

@@ -0,0 +1,32 @@
+/**
+ * 发送消息响应
+ * 
+ */
+import { z } from "zod";
+import {
+  booleanOrFalse,
+  booleanOrTrue,
+  numberOrLazy,
+  numberOrZero,
+  stringOrEmpty,
+} from "../../nullable-defaults";
+import { ChatImageSchema, ChatLockDetailSchema } from "../chat_payloads";
+
+export const ChatSendResponseSchema = z.object({
+  reply: stringOrEmpty,
+  audioUrl: stringOrEmpty,
+  messageId: stringOrEmpty,
+  isGuest: booleanOrFalse,
+  // 函数式 default —— 每次 parse 时重新调 Date.now()（后端不返回 timestamp 时用当下时间）
+  timestamp: numberOrLazy(() => Date.now()),
+  image: ChatImageSchema,
+  lockDetail: ChatLockDetailSchema,
+  canSendMessage: booleanOrTrue,
+  creditBalance: numberOrZero,
+  creditsCharged: numberOrZero,
+  requiredCredits: numberOrZero,
+  shortfallCredits: numberOrZero,
+});
+
+export type ChatSendResponseInput = z.input<typeof ChatSendResponseSchema>;
+export type ChatSendResponseData = z.output<typeof ChatSendResponseSchema>;