feat: add financial transactions management for companies

- Implemented a new route for managing financial transactions (money) for companies, including creating, editing, and deleting transactions.
- Added a new model `Buchung` to represent transactions with fields for date, account type, transaction type, amount, and description.
- Updated the `companies` model to include a relation to the new `Buchung` model.
- Enhanced the company overview page to link to the new financial transactions page.
- Added migration scripts to create the necessary database tables and fields for the new functionality.
- Created utility scripts for resetting the admin password and setting up the initial admin user.

app/routes/api.anlagevermoegen.$id.ts

@@ -0,0 +1,52 @@
+import { getApiUser } from "@/session.server";
+import prisma from "@/lib/prisma.server";
+import { z } from "zod";
+
+const updateSchema = z.object({
+  bezeichnung: z.string().min(1),
+  anschaffungsdatum: z.string().min(1),
+  anschaffungskosten: z.number().positive(),
+  nutzungsdauerJahre: z.number().int().min(1),
+  restwert: z.number().min(0),
+  beschreibung: z.string().optional(),
+  aktiv: z.boolean(),
+});
+
+export async function action({ request, params }: { request: Request; params: { id: string } }) {
+  const user = await getApiUser(request);
+  if (!user) return Response.json({ error: "Unauthorized" }, { status: 401 });
+
+  const asset = await prisma.anlagegut.findFirst({
+    where: { id: params.id, company: { userId: user.id } },
+  });
+  if (!asset) return Response.json({ error: "Not found" }, { status: 404 });
+
+  if (request.method === "DELETE") {
+    await prisma.anlagegut.delete({ where: { id: params.id } });
+    return Response.json({ ok: true });
+  }
+
+  const body = await request.json();
+  const parsed = updateSchema.safeParse(body);
+  if (!parsed.success) return Response.json({ error: parsed.error.issues }, { status: 400 });
+
+  const updated = await prisma.anlagegut.update({
+    where: { id: params.id },
+    data: {
+      bezeichnung: parsed.data.bezeichnung,
+      anschaffungsdatum: new Date(parsed.data.anschaffungsdatum),
+      anschaffungskosten: parsed.data.anschaffungskosten,
+      nutzungsdauerJahre: parsed.data.nutzungsdauerJahre,
+      restwert: parsed.data.restwert,
+      beschreibung: parsed.data.beschreibung,
+      aktiv: parsed.data.aktiv,
+    },
+  });
+
+  return Response.json({
+    ...updated,
+    anschaffungskosten: Number(updated.anschaffungskosten),
+    restwert: Number(updated.restwert),
+    anschaffungsdatum: updated.anschaffungsdatum.toISOString(),
+  });
+}