feat: add conversation image previews and sharing

packages/api-contracts/src/chats.ts

@@ -2,6 +2,7 @@ import { z } from 'zod';
 import { ErrorResponseSchema, RejectedActionResponseSchema } from './common.js';
 import { MAX_CONFIGURED_AUTOMATED_CONVERSATION_TURNS } from './config.js';
 import { RedditAccountOwnerSchema } from './session.js';
+import { MediaLibraryAssetSchema, MediaLibraryTagSchema } from './media.js';
 
 export const ChatMediaSchema = z.strictObject({
   originalUrl: z.string(),
@@ -91,6 +92,12 @@ export const SuggestedReplyResponseSchema = z.strictObject({
   conversationState: z.unknown().optional(),
 });
 export const SendReplyRequestSchema = z.strictObject({ message: z.string().min(1) });
+export const ConversationMediaShareOptionsResponseSchema = z.strictObject({
+  requestKind: z.union([MediaLibraryTagSchema, z.literal('generic')]).nullable(),
+  assets: z.array(MediaLibraryAssetSchema),
+  reason: z.string().nullable(),
+});
+export const ShareConversationMediaRequestSchema = z.strictObject({ assetId: z.string().uuid() });
 export const StartConversationRequestSchema = z.strictObject({
   accountId: z.string().min(1),
   username: z.string().min(1),
@@ -113,3 +120,4 @@ export const FetchAllChatsResponseSchema = z.strictObject({
 export type ActiveChat = z.infer<typeof ActiveChatSchema>;
 export type ChatSyncStatus = z.infer<typeof ChatSyncStatusSchema>;
 export type ConversationDetailResponse = z.infer<typeof ConversationDetailResponseSchema>;
+export type ConversationMediaShareOptions = z.infer<typeof ConversationMediaShareOptionsResponseSchema>;