Add conversation image replacement

packages/api-contracts/src/chats.ts

@@ -147,6 +147,28 @@ export const ConversationMediaShareOptionsResponseSchema = z.strictObject({
 });
 export const ShareConversationMediaRequestSchema = z.strictObject({ assetId: z.string().uuid() });
 
+export const ConversationImageReplacementTargetSchema = z.strictObject({
+  id: z.string().min(1),
+  label: z.string().min(1),
+  urlPath: z.string().min(1),
+});
+export const ConversationImageReplacementOptionsResponseSchema = z.strictObject({
+  sources: z.array(MediaLibraryAssetSchema),
+  targets: z.array(ConversationImageReplacementTargetSchema),
+  reason: z.string().nullable(),
+});
+export const GenerateConversationImageReplacementRequestSchema = z.strictObject({
+  sourceAssetId: z.string().uuid(),
+  targetId: z.string().min(1),
+});
+export const GenerateConversationImageReplacementResponseSchema = z.strictObject({
+  imageDataUrl: z.string().startsWith('data:image/jpeg;base64,'),
+  mimeType: z.literal('image/jpeg'),
+  fileName: z.string().min(1),
+  width: z.number().int().positive(),
+  height: z.number().int().positive(),
+});
+
 export const MarkConversationReadRequestSchema = z.strictObject({
   /** Defaults to the conversation's newest message when omitted. */
   throughTimestamp: z.number().int().nonnegative().optional(),
@@ -224,3 +246,6 @@ export type SellerScanResponse = z.infer<typeof SellerScanResponseSchema>;
 export type ChatSyncStatus = z.infer<typeof ChatSyncStatusSchema>;
 export type ConversationDetailResponse = z.infer<typeof ConversationDetailResponseSchema>;
 export type ConversationMediaShareOptions = z.infer<typeof ConversationMediaShareOptionsResponseSchema>;
+export type ConversationImageReplacementTarget = z.infer<typeof ConversationImageReplacementTargetSchema>;
+export type ConversationImageReplacementOptions = z.infer<typeof ConversationImageReplacementOptionsResponseSchema>;
+export type ConversationImageReplacementResult = z.infer<typeof GenerateConversationImageReplacementResponseSchema>;