feat(card): Added saved,get saved cards api and db schema (#695)

Author: Harxhit

apps/backend/prisma/migrations/20260715065009_extended_save_card/migration.sql

@@ -0,0 +1,27 @@
+-- CreateTable
+CREATE TABLE "saved_cards" (
+    "id" TEXT NOT NULL,
+    "user_id" TEXT NOT NULL,
+    "card_id" TEXT NOT NULL,
+    "saved_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "saved_cards_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "saved_cards_user_id_idx" ON "saved_cards"("user_id");
+
+-- CreateIndex
+CREATE INDEX "saved_cards_card_id_idx" ON "saved_cards"("card_id");
+
+-- CreateIndex
+CREATE INDEX "saved_cards_user_id_saved_at_idx" ON "saved_cards"("user_id", "saved_at");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "saved_cards_user_id_card_id_key" ON "saved_cards"("user_id", "card_id");
+
+-- AddForeignKey
+ALTER TABLE "saved_cards" ADD CONSTRAINT "saved_cards_user_id_fkey" FOREIGN KEY ("user_id") REFERENCES "users"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "saved_cards" ADD CONSTRAINT "saved_cards_card_id_fkey" FOREIGN KEY ("card_id") REFERENCES "cards"("id") ON DELETE CASCADE ON UPDATE CASCADE;

apps/backend/prisma/schema.prisma

@@ -45,6 +45,7 @@ model User {
   ownedTeams       Team[]            @relation("TeamOwner")
   teamMemberships  TeamMember[]      @relation("TeamMember")
   webhookEndpoints WebhookEndpoint[]
+  savedCards        SavedCard[]
 
   @@map("users")
 }
@@ -127,13 +128,33 @@ model Card {
   
   cardLinks CardLink[]
   views     CardView[]
+  savedBy   SavedCard[]
   
 
   @@map("cards")
   @@index([userId])
   @@index([viewCount])
 }
 
+model SavedCard {
+  id        String   @id @default(uuid())
+
+  userId    String   @map("user_id")
+  cardId    String   @map("card_id")
+
+  savedAt DateTime @default(now()) @map("saved_at")
+
+  user User @relation(fields: [userId], references: [id], onDelete: Cascade)
+  card Card @relation(fields: [cardId], references: [id], onDelete: Cascade)
+
+  @@unique([userId, cardId], name: "saved_card_unique")
+  @@index([userId])
+  @@index([cardId])
+  @@index([userId, savedAt])
+
+  @@map("saved_cards")
+}
+
 model CardLink {
   id             String @id @default(uuid())
   cardId         String @map("card_id")
@@ -301,4 +322,5 @@ model TeamMember {
   @@unique([userId, teamId])
   @@index([userId])
   @@map("team_members")
-}
+}
+