[FEAT] Show my country currency for one expense #760

Description

I have two feature suggestions that I think would make the app better.

1. Showing spending in both currencies

I travel quite a lot, and I use multiple currency accounts, such as EUR, USD, Thai baht, Indonesian rupiah, etc. I keep these currencies separated into different accounts.

However, when I make payments, the transactions always appear only in the local currency, which makes it difficult for me to understand how much I actually spent on each item.

For example, if I buy a coffee in Portugal, the transaction might show €13. I would also like to see how much that amount represents in my selected home currency.

It would be really useful to display both amounts — for example, “€13 / R$25” — based on the local currency I have selected in my settings.

This would make it much easier to keep track of my spending and understand the actual cost of each purchase in my own currency. Other apps already offer this automatically.

2. Setting a default time period

It would also be great to have the option to set a default time period for the data displayed in the app.

For example, when I open the app, I would like to always see my data for All Time, instead of having it automatically set to one month or one week.

I really like the “All Time” option, but currently I have to select it manually every time. Having a setting where I can choose my preferred default period — such as All Time — would make the experience much more convenient.

Thank you very much this app is so nice!!!

Additional Context

No response