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.

prisma/migrations/20260324162325_add_zahlungsart_steuersatz/migration.sql

@@ -0,0 +1,7 @@
+-- AlterTable
+ALTER TABLE `betriebsausgaben` ADD COLUMN `steuersatz` DECIMAL(5, 2) NOT NULL DEFAULT 0,
+    ADD COLUMN `zahlungsart` ENUM('KASSE', 'BANK') NOT NULL DEFAULT 'BANK';
+
+-- AlterTable
+ALTER TABLE `betriebseinnahmen` ADD COLUMN `steuersatz` DECIMAL(5, 2) NOT NULL DEFAULT 0,
+    ADD COLUMN `zahlungsart` ENUM('KASSE', 'BANK') NOT NULL DEFAULT 'BANK';

prisma/migrations/20260324172641_add_money_field/migration.sql

@@ -0,0 +1,2 @@
+-- AlterTable
+ALTER TABLE `companies` ADD COLUMN `money` JSON NULL;

prisma/migrations/20260324175608_add_buchungen_model/migration.sql

@@ -0,0 +1,28 @@
+/*
+  Warnings:
+
+  - You are about to drop the column `money` on the `companies` table. All the data in the column will be lost.
+
+*/
+-- AlterTable
+ALTER TABLE `companies` DROP COLUMN `money`;
+
+-- CreateTable
+CREATE TABLE `buchungen` (
+    `id` VARCHAR(191) NOT NULL,
+    `companyId` VARCHAR(191) NOT NULL,
+    `date` DATETIME(3) NOT NULL,
+    `account` ENUM('KASSE', 'BANK') NOT NULL,
+    `type` ENUM('EINLAGE', 'ENTNAHME') NOT NULL,
+    `amount` DECIMAL(10, 2) NOT NULL,
+    `description` TEXT NULL,
+    `createdAt` DATETIME(3) NOT NULL DEFAULT CURRENT_TIMESTAMP(3),
+    `updatedAt` DATETIME(3) NOT NULL,
+
+    INDEX `buchungen_companyId_idx`(`companyId`),
+    INDEX `buchungen_date_idx`(`date`),
+    PRIMARY KEY (`id`)
+) DEFAULT CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;
+
+-- AddForeignKey
+ALTER TABLE `buchungen` ADD CONSTRAINT `buchungen_companyId_fkey` FOREIGN KEY (`companyId`) REFERENCES `companies`(`id`) ON DELETE CASCADE ON UPDATE CASCADE;

prisma/schema.prisma

@@ -73,12 +73,40 @@ model Company {
   betriebsausgaben  Betriebsausgabe[]
   betriebseinnahmen Betriebseinnahme[]
   anlagegueter      Anlagegut[]
+  buchungen         Buchung[]
   createdAt       DateTime   @default(now())
   updatedAt       DateTime   @updatedAt
 
   @@map("companies")
 }
 
+enum TransactionAccount {
+  KASSE
+  BANK
+}
+
+enum TransactionType {
+  EINLAGE
+  ENTNAHME
+}
+
+model Buchung {
+  id          String             @id @default(cuid())
+  companyId   String
+  company     Company            @relation(fields: [companyId], references: [id], onDelete: Cascade)
+  date        DateTime
+  account     TransactionAccount
+  type        TransactionType
+  amount      Decimal            @db.Decimal(10, 2)
+  description String?            @db.Text
+  createdAt   DateTime           @default(now())
+  updatedAt   DateTime           @updatedAt
+
+  @@index([companyId])
+  @@index([date])
+  @@map("buchungen")
+}
+
 model Service {
   id          String   @id @default(cuid())
   companyId   String
@@ -146,6 +174,11 @@ enum InvoiceStatus {
   DELETED
 }
 
+enum Zahlungsart {
+  KASSE
+  BANK
+}
+
 enum EinnahmeKategorie {
   FUSSPFLEGE
   PRIVATEINLAGEN
@@ -165,6 +198,8 @@ model Betriebseinnahme {
   company      Company           @relation(fields: [companyId], references: [id], onDelete: Cascade)
   kategorie    EinnahmeKategorie
   betrag       Decimal           @db.Decimal(10, 2)
+  steuersatz   Decimal           @db.Decimal(5, 2) @default(0)
+  zahlungsart  Zahlungsart       @default(BANK)
   datum        DateTime
   beschreibung String?           @db.Text
   createdAt    DateTime          @default(now())
@@ -219,6 +254,8 @@ model Betriebsausgabe {
   company      Company          @relation(fields: [companyId], references: [id], onDelete: Cascade)
   kategorie    AusgabeKategorie
   betrag       Decimal          @db.Decimal(10, 2)
+  steuersatz   Decimal          @db.Decimal(5, 2) @default(0)
+  zahlungsart  Zahlungsart      @default(BANK)
   datum        DateTime
   beschreibung String?          @db.Text
   createdAt    DateTime         @default(now())