[Issue]: Show the running patrol on the iOS lock screen

[anis022]

Branch Name

feature/ios-live-activity

Description

This is a stretch goal, do not start until the other issues are done.

A patroller locks their phone and puts it in a pocket. Today there is no way to check the patrol without unlocking. A Live Activity puts the elapsed time and distance straight on the lock screen and in the Dynamic Island.

Scope

• Add a widget extension target to the Xcode project
• Build the card in SwiftUI. Lock screen, compact, expanded and minimal are all required by Apple
• Feed it from the native tracking service so the numbers keep moving with the app closed
• Start it when a patrol starts and end it when the patrol ends
• iOS 16.1 and up only, skip it below that

Acceptance Criteria

• The card appears on the lock screen when a patrol starts
• Time and distance keep updating with the app closed
• It disappears when the patrol ends
• Nothing breaks on an older iPhone

Notes

iOS only. Android shows the same numbers in its notification instead, which is far cheaper. Depends on the native point buffer. A Mac is required for all of it.

Checklist

• I have checked for duplicate issues.
• I have assigned the issue to the correct project board.
• I have tagged the issue properly.

Code of Conduct

• I agree to follow this project's Code of Conduct