Enhance ESLint configuration and improve code consistency

- Added '@typescript-eslint/no-unused-vars' rule to ESLint configuration for better variable management in TypeScript files.
- Updated database.ts to ensure consistent logging format.
- Refactored AuthController and CashflowController to improve variable naming and maintainability.
- Added spacing for better readability in multiple controller methods.
- Adjusted error handling in middleware and repository files for improved clarity.
- Enhanced various service and repository methods to ensure consistent return types and error handling.
- Made minor formatting adjustments across frontend components for improved user experience.

backend-api/src/controllers/DebtPaymentController.ts

@@ -42,15 +42,18 @@ export class DebtPaymentController {
 
     if (accountId) {
       const payments = await this.paymentService.getByAccount(accountId, userId);
+
       return reply.send({payments});
     }
 
     if (startDate && endDate) {
       const payments = await this.paymentService.getByDateRange(userId, new Date(startDate), new Date(endDate));
+
       return reply.send({payments});
     }
 
     const payments = await this.paymentService.getAllByUser(userId);
+
     return reply.send({payments});
   }