feat: 集成 AI 对话与只读查询工具

apps/server/src/ai-chat/dto/ai-chat.dto.ts

@@ -0,0 +1,38 @@
+import { Type } from 'class-transformer';
+import { IsInt, IsNotEmpty, IsOptional, IsString, Max, MaxLength, Min } from 'class-validator';
+
+export class CreateConversationDto {
+  @IsOptional()
+  @IsString()
+  @MaxLength(100)
+  title?: string;
+}
+
+export class RenameConversationDto {
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(100)
+  title: string;
+}
+
+export class SendMessageDto {
+  @IsString()
+  @IsNotEmpty()
+  @MaxLength(16000)
+  message: string;
+}
+
+export class MessagePageQueryDto {
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  page?: number;
+
+  @IsOptional()
+  @Type(() => Number)
+  @IsInt()
+  @Min(1)
+  @Max(100)
+  limit?: number;
+}