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shared-kernel/src/commonMain/kotlin/at/mocode/dto/base/BaseDto.kt

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+package at.mocode.dto.base
+
+import at.mocode.serializers.KotlinInstantSerializer
+import at.mocode.serializers.UuidSerializer
+import com.benasher44.uuid.Uuid
+import kotlinx.datetime.Instant
+import kotlinx.serialization.Serializable
+
+/**
+ * Base DTO interface for all data transfer objects
+ */
+interface BaseDto
+
+/**
+ * Base DTO for entities with ID and timestamps
+ */
+@Serializable
+abstract class EntityDto : BaseDto {
+    @Serializable(with = UuidSerializer::class)
+    abstract val id: Uuid
+
+    @Serializable(with = KotlinInstantSerializer::class)
+    abstract val createdAt: Instant
+
+    @Serializable(with = KotlinInstantSerializer::class)
+    abstract val updatedAt: Instant
+}
+
+/**
+ * Standard API response wrapper
+ */
+@Serializable
+data class ApiResponse<T>(
+    val success: Boolean,
+    val data: T? = null,
+    val error: ErrorDto? = null,
+    val message: String? = null
+) : BaseDto
+
+/**
+ * Error information DTO
+ */
+@Serializable
+data class ErrorDto(
+    val code: String,
+    val message: String,
+    val details: Map<String, String>? = null
+) : BaseDto
+
+/**
+ * Pagination information
+ */
+@Serializable
+data class PaginationDto(
+    val page: Int,
+    val size: Int,
+    val total: Long,
+    val totalPages: Int
+) : BaseDto
+
+/**
+ * Paginated response wrapper
+ */
+@Serializable
+data class PagedResponse<T>(
+    val data: List<T>,
+    val pagination: PaginationDto
+) : BaseDto