feat: add ability to share chats (#594)

lib/db/queries.ts

@@ -309,3 +309,18 @@ export async function deleteMessagesByChatIdAfterTimestamp({
     throw error;
   }
 }
+
+export async function updateChatVisiblityById({
+  chatId,
+  visibility,
+}: {
+  chatId: string;
+  visibility: 'private' | 'public';
+}) {
+  try {
+    return await db.update(chat).set({ visibility }).where(eq(chat.id, chatId));
+  } catch (error) {
+    console.error('Failed to update chat visibility in database');
+    throw error;
+  }
+}