feat(schema): IdeaProduct junction model + relaties op Idea en Product

Voegt IdeaProduct model toe met idea_id/product_id/created_at,
unique constraint op (idea_id, product_id), cascade-deletes.
Breidt Product.idea_products en Idea.secondary_products relaties uit.
Migratie 20260506010000_add_idea_product_secondary aangemaakt en toegepast.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

prisma/migrations/20260506010000_add_idea_product_secondary/migration.sql

@@ -0,0 +1,21 @@
+-- CreateTable
+CREATE TABLE "idea_products" (
+    "id" TEXT NOT NULL,
+    "idea_id" TEXT NOT NULL,
+    "product_id" TEXT NOT NULL,
+    "created_at" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    CONSTRAINT "idea_products_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE INDEX "idea_products_product_id_idx" ON "idea_products"("product_id");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "idea_products_idea_id_product_id_key" ON "idea_products"("idea_id", "product_id");
+
+-- AddForeignKey
+ALTER TABLE "idea_products" ADD CONSTRAINT "idea_products_idea_id_fkey" FOREIGN KEY ("idea_id") REFERENCES "ideas"("id") ON DELETE CASCADE ON UPDATE CASCADE;
+
+-- AddForeignKey
+ALTER TABLE "idea_products" ADD CONSTRAINT "idea_products_product_id_fkey" FOREIGN KEY ("product_id") REFERENCES "products"("id") ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -188,6 +188,7 @@ model Product {
   claude_questions   ClaudeQuestion[]
   claude_jobs        ClaudeJob[]
   ideas              Idea[]
+  idea_products      IdeaProduct[]
 
   @@unique([user_id, name])
   @@unique([user_id, code])
@@ -416,10 +417,11 @@ model Idea {
   created_at  DateTime   @default(now())
   updated_at  DateTime   @updatedAt
 
-  questions      ClaudeQuestion[]
+  questions          ClaudeQuestion[]
-  jobs           ClaudeJob[]
+  jobs               ClaudeJob[]
-  logs           IdeaLog[]
+  logs               IdeaLog[]
-  user_questions UserQuestion[]
+  user_questions     UserQuestion[]
+  secondary_products IdeaProduct[]
 
   @@unique([user_id, code])
   @@index([user_id, archived, status])
@@ -427,6 +429,20 @@ model Idea {
   @@map("ideas")
 }
 
+model IdeaProduct {
+  id         String   @id @default(cuid())
+  idea_id    String
+  product_id String
+  created_at DateTime @default(now())
+
+  idea       Idea     @relation(fields: [idea_id], references: [id], onDelete: Cascade)
+  product    Product  @relation(fields: [product_id], references: [id], onDelete: Cascade)
+
+  @@unique([idea_id, product_id])
+  @@index([product_id])
+  @@map("idea_products")
+}
+
 model IdeaLog {
   id         String      @id @default(cuid())
   idea       Idea        @relation(fields: [idea_id], references: [id], onDelete: Cascade)