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/request/send_message_request.ts

@@ -0,0 +1,26 @@
+/**
+ * 发送消息请求
+ * 
+ */
+import { z } from "zod";
+
+import {
+  booleanOrFalse,
+  numberOrZero,
+  stringOrEmpty,
+} from "../../nullable-defaults";
+
+export const SendMessageRequestSchema = z.object({
+  message: stringOrEmpty,
+  image: stringOrEmpty,
+  imageId: stringOrEmpty,
+  imageThumbUrl: stringOrEmpty,
+  imageMediumUrl: stringOrEmpty,
+  imageOriginalUrl: stringOrEmpty,
+  imageWidth: numberOrZero,
+  imageHeight: numberOrZero,
+  useWebSocket: booleanOrFalse,
+});
+
+export type SendMessageRequestInput = z.input<typeof SendMessageRequestSchema>;
+export type SendMessageRequestData = z.output<typeof SendMessageRequestSchema>;