added api logic, vitest, minimal testing ui

api/prisma/schema.prisma

@@ -1,6 +1,13 @@
-// prisma/schema.prisma 
-generator client { provider = "prisma-client-js" }
-datasource db { provider = "postgresql"; url = env("DATABASE_URL") }
+// prisma/schema.prisma
+generator client {
+  provider      = "prisma-client-js"
+  binaryTargets = ["native", "debian-openssl-3.0.x"]
+}
+
+datasource db {
+  provider = "postgresql"
+  url      = env("DATABASE_URL")
+}
 
 model User {
   id        String   @id @default(uuid())
@@ -25,63 +32,59 @@ model VariableCategory {
   balanceCents BigInt  @default(0)
 
   @@unique([userId, name])
-  @@check(percent_gte_0,  "percent >= 0")
-  @@check(percent_lte_100,"percent <= 100")
+  @@index([userId, priority])
 }
 
 model FixedPlan {
-  id          String  @id @default(uuid())
-  userId      String
-  user        User    @relation(fields: [userId], references: [id], onDelete: Cascade)
-  name        String
-  cycleStart  DateTime
-  dueOn       DateTime
-  totalCents  BigInt
-  fundedCents BigInt  @default(0)
-  priority    Int     @default(100)
-  fundingMode String  @default("auto-on-deposit") // or 'by-schedule'
+  id           String   @id @default(uuid())
+  userId       String
+  user         User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  name         String
+  cycleStart   DateTime
+  dueOn        DateTime
+  totalCents   BigInt
+  fundedCents  BigInt   @default(0)
+  priority     Int      @default(100)
+  fundingMode  String   @default("auto-on-deposit")
   scheduleJson Json?
 
   @@unique([userId, name])
-  @@check(total_nonneg,     "totalCents >= 0")
-  @@check(funded_nonneg,    "fundedCents >= 0")
+  @@index([userId, dueOn])
+  @@index([userId, priority])
 }
 
 model IncomeEvent {
-  id          String   @id @default(uuid())
+  id          String       @id @default(uuid())
   userId      String
-  user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  user        User         @relation(fields: [userId], references: [id], onDelete: Cascade)
   postedAt    DateTime
   amountCents BigInt
-
   allocations Allocation[]
 
-  @@check(pos_amount, "amountCents > 0")
+  @@index([userId, postedAt])
 }
 
 model Allocation {
-  id          String   @id @default(uuid())
+  id          String       @id @default(uuid())
   userId      String
-  user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
-  createdAt   DateTime @default(now())
-  kind        String   // 'savings' | 'variable' | 'fixed'
+  user        User         @relation(fields: [userId], references: [id], onDelete: Cascade)
+  createdAt   DateTime     @default(now())
+  kind        String
   toId        String
   amountCents BigInt
   incomeId    String?
   income      IncomeEvent? @relation(fields: [incomeId], references: [id])
-
-  @@check(pos_amount, "amountCents > 0")
 }
 
 model Transaction {
-  id           String   @id @default(uuid())
-  userId       String
-  user         User     @relation(fields: [userId], references: [id], onDelete: Cascade)
-  occurredAt   DateTime
-  kind         String   // 'variable-spend' | 'fixed-payment'
-  categoryId   String?
-  planId       String?
-  amountCents  BigInt
+  id          String   @id @default(uuid())
+  userId      String
+  user        User     @relation(fields: [userId], references: [id], onDelete: Cascade)
+  occurredAt  DateTime
+  kind        String
+  categoryId  String?
+  planId      String?
+  amountCents BigInt
 
-  @@check(pos_amount, "amountCents > 0")
+  @@index([userId, occurredAt])
 }