chore: commit previously untracked runtime files (splits, auth, participants, shared)

src/app/api/transactions/[id]/splits/route.ts

@@ -0,0 +1,79 @@
+import { NextRequest, NextResponse } from "next/server";
+import { prisma } from "@/lib/db";
+import { queryRaw } from "@/lib/db";
+
+interface SplitInput {
+  participant_id: number;
+  share_percent: number;
+}
+
+interface SplitRow {
+  id: number;
+  transaction_id: number;
+  participant_id: number;
+  name: string;
+  share_percent: number;
+  settled: boolean;
+  settled_at: string | null;
+  created_at: string;
+}
+
+export async function GET(
+  _req: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const { id } = await params;
+  const splits = await queryRaw<SplitRow>(
+    `SELECT ts.*, p.name
+     FROM transaction_splits ts
+     JOIN participants p ON p.id = ts.participant_id
+     WHERE ts.transaction_id = $1
+     ORDER BY p.name`,
+    [Number(id)]
+  );
+  return NextResponse.json(splits);
+}
+
+export async function POST(
+  req: NextRequest,
+  { params }: { params: Promise<{ id: string }> }
+) {
+  const { id } = await params;
+  const transactionId = Number(id);
+  const { splits } = (await req.json()) as { splits: SplitInput[] };
+
+  if (!splits || !Array.isArray(splits) || splits.length === 0) {
+    return NextResponse.json({ error: "splits array required" }, { status: 400 });
+  }
+
+  const total = splits.reduce((sum, s) => sum + Number(s.share_percent), 0);
+  if (Math.abs(total - 100) > 0.01) {
+    return NextResponse.json(
+      { error: `Shares must sum to 100%, got ${total}%` },
+      { status: 400 }
+    );
+  }
+
+  // Replace all splits for this transaction atomically
+  await prisma.$transaction([
+    prisma.transaction_splits.deleteMany({ where: { transaction_id: transactionId } }),
+    ...splits.map((s) =>
+      prisma.transaction_splits.create({
+        data: {
+          transaction_id: transactionId,
+          participant_id: s.participant_id,
+          share_percent: s.share_percent,
+        },
+      })
+    ),
+  ]);
+
+  const result = await queryRaw<SplitRow>(
+    `SELECT ts.*, p.name FROM transaction_splits ts
+     JOIN participants p ON p.id = ts.participant_id
+     WHERE ts.transaction_id = $1 ORDER BY p.name`,
+    [transactionId]
+  );
+
+  return NextResponse.json(result);
+}