ワリカンカケイボ：レシート読取り割り勘家計簿

We have improved the usability of the invitation and bill-splitting features and fixed some bugs. - [New Feature] Added support for invitation QR codes. The inviter can display a QR code within the app, and the invitee can join the household account simply by scanning it using the app's scanner screen. This allows for in-person invitations to be completed without sharing a link. - [New Feature] You can now select "Split this expense" from the menu on the expense details screen. This allows you to immediately split a specific expense without having to navigate back to the bill-splitting tab to select it. - [Bug Fix] Fixed an issue where an error screen would sometimes appear immediately after launch—specifically during unstable network conditions or when launching the app after it had been running in the background. The app now automatically retries operations following temporary network errors. - [Bug Fix] Fixed an issue where an error could occur when tapping a new type of notification while using an outdated version of the app.