Add total price to label and location pages

[JackBailey]

What type of PR is this?

• feature

What this PR does / why we need it:

It adds an indicator to the /label and /location pages to show the overall purchase price.

This is a modified version of #638, where calculation is performed on the backend, instead of the frontend, as requested by @hay-kot.

For locations it includes child locations.

Location

Label

Changed files:

• backend/app/api/handlers/v1/v1_ctrl_items.go
  • Add totalPrice field which sums the purchasePrice of all items returned
• backend/app/api/handlers/v1/v1_ctrl_locations.go
  • Add totalPrice field which sums the purchasePrice of the current location's items, as well as any child locations.
• frontend/pages/label/[id].vue
  • Add totalPrice indicator
• frontend/pages/location/[id].vue
  • Add totalPrice indicator
• backend/internal/data/repo/pagination.go
  • Add type (float64) for totalPrice
• backend/internal/data/repo/repo_locations.go
  • Add type (float64) for totalPrice

Special notes for your reviewer:

I haven't used golang before, there's no errors and it works but it might not be done to the best way.

Testing

Labels

• Tested with lots, some and no items

Locations

• Location with/without items
• With/without child locations
• With child locations, and without own items

Release Notes

Added a chip-style indicator to show the total price for labels and locations.

[JackBailey]

A way to build onto this could be adding the price directly on the item cards, and taking into consideration if the item is sold or not. However, especially for having the price on the cards, some people might not want these additions. So it might be a good idea to add them, but as an option - although this would probably be a fair bit larger of a change so more than I could personally cobble together in a language I've hardly touched.

[JackBailey]

Any thoughts @hay-kot?

[hay-kot]

Hey! I do want to merge this. I still need to work through your approach, I think there may be some better ways to do this. I will try to get through the PR this week or next.