Address code review feedback: remove duplication, improve type safety, and harden error handling#122

nielsdrost7 merged 4 commits intocopilot/add-report-templates-diskInvoicePlane/InvoicePlane-v2:copilot/add-report-templates-diskfrom

copilot/remove-duplicate-color-methodInvoicePlane/InvoicePlane-v2:copilot/remove-duplicate-color-methodCopy head branch name to clipboard